Add `response.content_type` checks for JSON to `api/v1` request specs (#31981)

spec/requests/api/oembed_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'API OEmbed' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.headers['Cache-Control'])
           .to include('private, no-store')
       end
@@ -27,6 +29,8 @@ RSpec.describe 'API OEmbed' do
 
         expect(response)
           .to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/accounts/credentials_spec.rb

@@ -20,6 +20,8 @@ RSpec.describe 'credentials API' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to include({
         source: hash_including({
           discoverable: false,
@@ -36,6 +38,8 @@ RSpec.describe 'credentials API' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body).to include({
           locked: true,
@@ -75,6 +79,8 @@ RSpec.describe 'credentials API' do
       it 'returns http success' do
         subject
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -84,6 +90,8 @@ RSpec.describe 'credentials API' do
       it 'returns http unprocessable entity' do
         subject
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -92,6 +100,8 @@ RSpec.describe 'credentials API' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body).to include({
         source: hash_including({

spec/requests/api/v1/accounts/familiar_followers_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'Accounts Familiar Followers API' do
       get '/api/v1/accounts/familiar_followers', params: { account_id: account.id, limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there are duplicate account IDs in the params' do

spec/requests/api/v1/accounts/featured_tags_spec.rb

@@ -23,6 +23,8 @@ RSpec.describe 'account featured tags API' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to contain_exactly(a_hash_including({
         name: 'bar',
         url: "https://cb6e6126.ngrok.io/@#{account.username}/tagged/bar",
@@ -37,6 +39,8 @@ RSpec.describe 'account featured tags API' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to contain_exactly(a_hash_including({
           name: 'bar',
           url: "https://cb6e6126.ngrok.io/@#{account.pretty_acct}/tagged/bar",

spec/requests/api/v1/accounts/follower_accounts_spec.rb

@@ -21,6 +21,8 @@ RSpec.describe 'API V1 Accounts FollowerAccounts' do
       get "/api/v1/accounts/#{account.id}/followers", params: { limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body.size).to eq 2
       expect([response.parsed_body[0][:id], response.parsed_body[1][:id]]).to contain_exactly(alice.id.to_s, bob.id.to_s)
     end
@@ -30,6 +32,8 @@ RSpec.describe 'API V1 Accounts FollowerAccounts' do
       get "/api/v1/accounts/#{account.id}/followers", params: { limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body.size).to eq 1
       expect(response.parsed_body[0][:id]).to eq alice.id.to_s
     end

spec/requests/api/v1/accounts/following_accounts_spec.rb

@@ -21,6 +21,8 @@ RSpec.describe 'API V1 Accounts FollowingAccounts' do
       get "/api/v1/accounts/#{account.id}/following", params: { limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body.size).to eq 2
       expect([response.parsed_body[0][:id], response.parsed_body[1][:id]]).to contain_exactly(alice.id.to_s, bob.id.to_s)
     end
@@ -30,6 +32,8 @@ RSpec.describe 'API V1 Accounts FollowingAccounts' do
       get "/api/v1/accounts/#{account.id}/following", params: { limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body.size).to eq 1
       expect(response.parsed_body[0][:id]).to eq alice.id.to_s
     end

spec/requests/api/v1/accounts/identity_proofs_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'Accounts Identity Proofs API' do
       get "/api/v1/accounts/#{account.id}/identity_proofs", params: { limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/accounts/lists_spec.rb

@@ -20,6 +20,8 @@ RSpec.describe 'Accounts Lists API' do
       get "/api/v1/accounts/#{account.id}/lists", headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/accounts/lookup_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'Accounts Lookup API' do
       get '/api/v1/accounts/lookup', params: { account_id: account.id, acct: account.acct }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/accounts/notes_spec.rb

@@ -22,6 +22,8 @@ RSpec.describe 'Accounts Notes API' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(AccountNote.find_by(account_id: user.account.id, target_account_id: account.id).comment).to eq comment
       end
     end
@@ -33,6 +35,8 @@ RSpec.describe 'Accounts Notes API' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(AccountNote.where(account_id: user.account.id, target_account_id: account.id)).to_not exist
       end
     end

spec/requests/api/v1/accounts/pins_spec.rb

@@ -21,6 +21,8 @@ RSpec.describe 'Accounts Pins API' do
         subject
       end.to change { AccountPin.where(account: user.account, target_account: kevin.account).count }.by(1)
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -36,6 +38,8 @@ RSpec.describe 'Accounts Pins API' do
         subject
       end.to change { AccountPin.where(account: user.account, target_account: kevin.account).count }.by(-1)
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/accounts/relationships_spec.rb

@@ -29,6 +29,8 @@ RSpec.describe 'GET /api/v1/accounts/relationships' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body)
         .to be_an(Enumerable)
         .and contain_exactly(
@@ -50,6 +52,8 @@ RSpec.describe 'GET /api/v1/accounts/relationships' do
 
           expect(response)
             .to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body)
             .to be_an(Enumerable)
             .and have_attributes(
@@ -70,6 +74,8 @@ RSpec.describe 'GET /api/v1/accounts/relationships' do
 
           expect(response)
             .to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body)
             .to be_an(Enumerable)
             .and have_attributes(
@@ -149,6 +155,8 @@ RSpec.describe 'GET /api/v1/accounts/relationships' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body)
         .to be_an(Enumerable)
@@ -171,6 +179,8 @@ RSpec.describe 'GET /api/v1/accounts/relationships' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body)
         .to be_an(Enumerable)

spec/requests/api/v1/accounts/search_spec.rb

@@ -13,6 +13,8 @@ RSpec.describe 'Accounts Search API' do
       get '/api/v1/accounts/search', params: { q: 'query' }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/accounts/statuses_spec.rb

@@ -19,6 +19,8 @@ RSpec.describe 'API V1 Accounts Statuses' do
           prev: api_v1_account_statuses_url(limit: 1, min_id: status.id),
           next: api_v1_account_statuses_url(limit: 1, max_id: status.id)
         )
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'with only media' do
@@ -26,6 +28,8 @@ RSpec.describe 'API V1 Accounts Statuses' do
         get "/api/v1/accounts/#{user.account.id}/statuses", params: { only_media: true }, headers: headers
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -41,6 +45,8 @@ RSpec.describe 'API V1 Accounts Statuses' do
       it 'returns posts along with self replies', :aggregate_failures do
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body)
           .to have_attributes(size: 2)
           .and contain_exactly(
@@ -61,6 +67,8 @@ RSpec.describe 'API V1 Accounts Statuses' do
         expect(response)
           .to have_http_status(200)
           .and include_pagination_headers(prev: api_v1_account_statuses_url(pinned: true, min_id: Status.first.id))
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -79,6 +87,8 @@ RSpec.describe 'API V1 Accounts Statuses' do
             prev: api_v1_account_statuses_url(pinned: true, min_id: Status.first.id),
             next: api_v1_account_statuses_url(pinned: true, max_id: Status.first.id)
           )
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -96,6 +106,8 @@ RSpec.describe 'API V1 Accounts Statuses' do
         get "/api/v1/accounts/#{account.id}/statuses", params: { pinned: true }, headers: headers
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
 
       context 'when user does not follow account' do
@@ -122,6 +134,8 @@ RSpec.describe 'API V1 Accounts Statuses' do
               a_hash_including(id: status.id.to_s),
               a_hash_including(id: private_status.id.to_s)
             )
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end

spec/requests/api/v1/accounts_spec.rb

@@ -17,6 +17,8 @@ RSpec.describe '/api/v1/accounts' do
       get '/api/v1/accounts', headers: headers, params: { id: [account.id, other_account.id, 123_123] }
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to contain_exactly(
         hash_including(id: account.id.to_s),
         hash_including(id: other_account.id.to_s)
@@ -32,6 +34,8 @@ RSpec.describe '/api/v1/accounts' do
         get "/api/v1/accounts/#{account.id}"
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:id]).to eq(account.id.to_s)
       end
     end
@@ -41,6 +45,8 @@ RSpec.describe '/api/v1/accounts' do
         get '/api/v1/accounts/1'
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:error]).to eq('Record not found')
       end
     end
@@ -57,6 +63,8 @@ RSpec.describe '/api/v1/accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:id]).to eq(account.id.to_s)
       end
 
@@ -80,6 +88,8 @@ RSpec.describe '/api/v1/accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:access_token]).to_not be_blank
 
         user = User.find_by(email: 'hello@world.tld')
@@ -93,6 +103,8 @@ RSpec.describe '/api/v1/accounts' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -113,6 +125,8 @@ RSpec.describe '/api/v1/accounts' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(response.parsed_body)
             .to include(
@@ -133,6 +147,8 @@ RSpec.describe '/api/v1/accounts' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(response.parsed_body)
             .to include(
@@ -203,6 +219,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.following?(other_account)).to be false
     end
 
@@ -225,6 +243,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.followed_by?(other_account)).to be false
     end
 
@@ -247,6 +267,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.following?(other_account)).to be false
       expect(user.account.blocking?(other_account)).to be true
     end
@@ -270,6 +292,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.blocking?(other_account)).to be false
     end
 
@@ -292,6 +316,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.following?(other_account)).to be true
       expect(user.account.muting?(other_account)).to be true
       expect(user.account.muting_notifications?(other_account)).to be true
@@ -316,6 +342,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.following?(other_account)).to be true
       expect(user.account.muting?(other_account)).to be true
       expect(user.account.muting_notifications?(other_account)).to be false
@@ -340,6 +368,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.following?(other_account)).to be true
       expect(user.account.muting?(other_account)).to be true
       expect(user.account.muting_notifications?(other_account)).to be true
@@ -364,6 +394,8 @@ RSpec.describe '/api/v1/accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.muting?(other_account)).to be false
     end
 

spec/requests/api/v1/admin/account_actions_spec.rb

@@ -61,6 +61,8 @@ RSpec.describe 'Account actions' do
       it 'disables the target account' do
         expect { subject }.to change { target_account.reload.user_disabled? }.from(false).to(true)
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -75,6 +77,8 @@ RSpec.describe 'Account actions' do
       it 'marks the target account as sensitive' do
         expect { subject }.to change { target_account.reload.sensitized? }.from(false).to(true)
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -89,6 +93,8 @@ RSpec.describe 'Account actions' do
       it 'marks the target account as silenced' do
         expect { subject }.to change { target_account.reload.silenced? }.from(false).to(true)
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -103,6 +109,8 @@ RSpec.describe 'Account actions' do
       it 'marks the target account as suspended' do
         expect { subject }.to change { target_account.reload.suspended? }.from(false).to(true)
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -115,6 +123,8 @@ RSpec.describe 'Account actions' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -125,6 +135,8 @@ RSpec.describe 'Account actions' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -135,6 +147,8 @@ RSpec.describe 'Account actions' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/accounts_spec.rb

@@ -19,6 +19,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.pluck(:id)).to match_array(expected_results.map { |a| a.id.to_s })
       end
     end
@@ -93,6 +95,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq(params[:limit])
       end
     end
@@ -112,6 +116,8 @@ RSpec.describe 'Accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match(
         a_hash_including(id: account.id.to_s, username: account.username, email: account.user.email)
       )
@@ -122,6 +128,8 @@ RSpec.describe 'Accounts' do
         get '/api/v1/admin/accounts/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -145,6 +153,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(account.reload.user_approved?).to be(true)
       end
 
@@ -166,6 +176,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -174,6 +186,8 @@ RSpec.describe 'Accounts' do
         post '/api/v1/admin/accounts/-1/approve', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -197,6 +211,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(User.where(id: account.user.id)).to_not exist
 
         expect(latest_admin_action_log)
@@ -214,6 +230,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -222,6 +240,8 @@ RSpec.describe 'Accounts' do
         post '/api/v1/admin/accounts/-1/reject', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -244,6 +264,8 @@ RSpec.describe 'Accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(account.reload.user_disabled?).to be false
     end
 
@@ -252,6 +274,8 @@ RSpec.describe 'Accounts' do
         post '/api/v1/admin/accounts/-1/enable', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -275,6 +299,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(account.reload.suspended?).to be false
       end
     end
@@ -284,6 +310,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -292,6 +320,8 @@ RSpec.describe 'Accounts' do
         post '/api/v1/admin/accounts/-1/unsuspend', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -314,6 +344,8 @@ RSpec.describe 'Accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(account.reload.sensitized?).to be false
     end
 
@@ -322,6 +354,8 @@ RSpec.describe 'Accounts' do
         post '/api/v1/admin/accounts/-1/unsensitive', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -344,6 +378,8 @@ RSpec.describe 'Accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(account.reload.silenced?).to be false
     end
 
@@ -352,6 +388,8 @@ RSpec.describe 'Accounts' do
         post '/api/v1/admin/accounts/-1/unsilence', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -376,6 +414,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(Admin::AccountDeletionWorker).to have_received(:perform_async).with(account.id).once
       end
     end
@@ -393,6 +433,8 @@ RSpec.describe 'Accounts' do
         delete '/api/v1/admin/accounts/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/canonical_email_blocks_spec.rb

@@ -24,6 +24,8 @@ RSpec.describe 'Canonical Email Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there is no canonical email block' do
@@ -96,6 +98,8 @@ RSpec.describe 'Canonical Email Blocks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body)
           .to include(
             id: eq(canonical_email_block.id.to_s),
@@ -109,6 +113,8 @@ RSpec.describe 'Canonical Email Blocks' do
         get '/api/v1/admin/canonical_email_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -131,6 +137,8 @@ RSpec.describe 'Canonical Email Blocks' do
         subject
 
         expect(response).to have_http_status(400)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -142,6 +150,8 @@ RSpec.describe 'Canonical Email Blocks' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body.first[:canonical_email_hash]).to eq(canonical_email_block.canonical_email_hash)
         end
       end
@@ -151,6 +161,8 @@ RSpec.describe 'Canonical Email Blocks' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body).to be_empty
         end
       end
@@ -173,6 +185,8 @@ RSpec.describe 'Canonical Email Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body[:canonical_email_hash]).to eq(canonical_email_block.canonical_email_hash)
     end
 
@@ -183,6 +197,8 @@ RSpec.describe 'Canonical Email Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -193,6 +209,8 @@ RSpec.describe 'Canonical Email Blocks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:canonical_email_hash]).to eq(params[:canonical_email_hash])
       end
     end
@@ -204,6 +222,8 @@ RSpec.describe 'Canonical Email Blocks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:canonical_email_hash]).to eq(canonical_email_block.canonical_email_hash)
       end
     end
@@ -217,6 +237,8 @@ RSpec.describe 'Canonical Email Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -237,6 +259,8 @@ RSpec.describe 'Canonical Email Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(CanonicalEmailBlock.find_by(id: canonical_email_block.id)).to be_nil
     end
 
@@ -245,6 +269,8 @@ RSpec.describe 'Canonical Email Blocks' do
         delete '/api/v1/admin/canonical_email_blocks/0', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/dimensions_spec.rb

@@ -15,6 +15,8 @@ RSpec.describe 'Admin Dimensions' do
 
         expect(response)
           .to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -27,6 +29,9 @@ RSpec.describe 'Admin Dimensions' do
         expect(response)
           .to have_http_status(200)
 
+        expect(response.content_type)
+          .to start_with('application/json')
+
         expect(response.parsed_body)
           .to be_an(Array)
       end

spec/requests/api/v1/admin/domain_allows_spec.rb

@@ -24,6 +24,8 @@ RSpec.describe 'Domain Allows' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there is no allowed domains' do
@@ -79,6 +81,8 @@ RSpec.describe 'Domain Allows' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body[:domain]).to eq domain_allow.domain
     end
 
@@ -87,6 +91,8 @@ RSpec.describe 'Domain Allows' do
         get '/api/v1/admin/domain_allows/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -107,6 +113,8 @@ RSpec.describe 'Domain Allows' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:domain]).to eq 'foo.bar.com'
         expect(DomainAllow.find_by(domain: 'foo.bar.com')).to be_present
       end
@@ -119,6 +127,8 @@ RSpec.describe 'Domain Allows' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -129,6 +139,8 @@ RSpec.describe 'Domain Allows' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -160,6 +172,8 @@ RSpec.describe 'Domain Allows' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(DomainAllow.find_by(id: domain_allow.id)).to be_nil
     end
 
@@ -168,6 +182,8 @@ RSpec.describe 'Domain Allows' do
         delete '/api/v1/admin/domain_allows/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/domain_blocks_spec.rb

@@ -24,6 +24,8 @@ RSpec.describe 'Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there are no domain blocks' do
@@ -94,6 +96,8 @@ RSpec.describe 'Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match(
         id: domain_block.id.to_s,
         domain: domain_block.domain,
@@ -113,6 +117,8 @@ RSpec.describe 'Domain Blocks' do
         get '/api/v1/admin/domain_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -132,6 +138,8 @@ RSpec.describe 'Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match a_hash_including(
         {
           domain: 'foo.bar.com',
@@ -153,6 +161,8 @@ RSpec.describe 'Domain Blocks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to match a_hash_including(
           {
             domain: 'foo.bar.com',
@@ -173,6 +183,8 @@ RSpec.describe 'Domain Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:existing_domain_block][:domain]).to eq('foo.bar.com')
       end
     end
@@ -186,6 +198,8 @@ RSpec.describe 'Domain Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:existing_domain_block][:domain]).to eq('bar.com')
       end
     end
@@ -197,6 +211,8 @@ RSpec.describe 'Domain Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -217,6 +233,8 @@ RSpec.describe 'Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match a_hash_including(
         {
           id: domain_block.id.to_s,
@@ -236,6 +254,8 @@ RSpec.describe 'Domain Blocks' do
         put '/api/v1/admin/domain_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -255,6 +275,8 @@ RSpec.describe 'Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(DomainBlock.find_by(id: domain_block.id)).to be_nil
     end
 
@@ -263,6 +285,8 @@ RSpec.describe 'Domain Blocks' do
         delete '/api/v1/admin/domain_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/email_domain_blocks_spec.rb

@@ -25,6 +25,8 @@ RSpec.describe 'Email Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there is no email domain block' do
@@ -97,6 +99,8 @@ RSpec.describe 'Email Domain Blocks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:domain]).to eq(email_domain_block.domain)
       end
     end
@@ -106,6 +110,8 @@ RSpec.describe 'Email Domain Blocks' do
         get '/api/v1/admin/email_domain_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -125,6 +131,8 @@ RSpec.describe 'Email Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body[:domain]).to eq(params[:domain])
     end
 
@@ -135,6 +143,8 @@ RSpec.describe 'Email Domain Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -145,6 +155,8 @@ RSpec.describe 'Email Domain Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -157,6 +169,8 @@ RSpec.describe 'Email Domain Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -176,6 +190,8 @@ RSpec.describe 'Email Domain Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to be_empty
       expect(EmailDomainBlock.find_by(id: email_domain_block.id)).to be_nil
     end
@@ -185,6 +201,8 @@ RSpec.describe 'Email Domain Blocks' do
         delete '/api/v1/admin/email_domain_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/ip_blocks_spec.rb

@@ -24,6 +24,8 @@ RSpec.describe 'IP Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there is no ip block' do
@@ -88,6 +90,8 @@ RSpec.describe 'IP Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body)
         .to include(
@@ -101,6 +105,8 @@ RSpec.describe 'IP Blocks' do
         get '/api/v1/admin/ip_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -120,6 +126,8 @@ RSpec.describe 'IP Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body)
         .to include(
           ip: eq("#{params[:ip]}/32"),
@@ -135,6 +143,8 @@ RSpec.describe 'IP Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -145,6 +155,8 @@ RSpec.describe 'IP Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -157,6 +169,8 @@ RSpec.describe 'IP Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -167,6 +181,8 @@ RSpec.describe 'IP Blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -185,6 +201,8 @@ RSpec.describe 'IP Blocks' do
         .and change_comment_value
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match(hash_including({
         ip: "#{ip_block.ip}/#{ip_block.ip.prefix}",
         severity: 'sign_up_requires_approval',
@@ -205,6 +223,8 @@ RSpec.describe 'IP Blocks' do
         put '/api/v1/admin/ip_blocks/-1', headers: headers, params: params
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -220,6 +240,8 @@ RSpec.describe 'IP Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to be_empty
       expect(IpBlock.find_by(id: ip_block.id)).to be_nil
     end
@@ -229,6 +251,8 @@ RSpec.describe 'IP Blocks' do
         delete '/api/v1/admin/ip_blocks/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/measures_spec.rb

@@ -32,6 +32,8 @@ RSpec.describe 'Admin Measures' do
 
         expect(response)
           .to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -43,6 +45,8 @@ RSpec.describe 'Admin Measures' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_an(Array)

spec/requests/api/v1/admin/reports_spec.rb

@@ -23,6 +23,8 @@ RSpec.describe 'Reports' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there are no reports' do
@@ -126,6 +128,8 @@ RSpec.describe 'Reports' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to include(
         {
           id: report.id.to_s,
@@ -156,6 +160,8 @@ RSpec.describe 'Reports' do
         .and create_an_action_log
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       report.reload
 
@@ -190,6 +196,8 @@ RSpec.describe 'Reports' do
         .to change { report.reload.unresolved? }.from(true).to(false)
         .and create_an_action_log
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -208,6 +216,8 @@ RSpec.describe 'Reports' do
         .to change { report.reload.unresolved? }.from(false).to(true)
         .and create_an_action_log
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -226,6 +236,8 @@ RSpec.describe 'Reports' do
         .to change { report.reload.assigned_account_id }.from(nil).to(user.account.id)
         .and create_an_action_log
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -244,6 +256,8 @@ RSpec.describe 'Reports' do
         .to change { report.reload.assigned_account_id }.from(user.account.id).to(nil)
         .and create_an_action_log
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 

spec/requests/api/v1/admin/retention_spec.rb

@@ -15,6 +15,8 @@ RSpec.describe 'Admin Retention' do
 
         expect(response)
           .to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -26,6 +28,8 @@ RSpec.describe 'Admin Retention' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_an(Array)

spec/requests/api/v1/admin/tags_spec.rb

@@ -24,6 +24,8 @@ RSpec.describe 'Tags' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when there are no tags' do
@@ -77,6 +79,8 @@ RSpec.describe 'Tags' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body[:id].to_i).to eq(tag.id)
       expect(response.parsed_body[:name]).to eq(tag.name)
@@ -87,6 +91,8 @@ RSpec.describe 'Tags' do
         get '/api/v1/admin/tags/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -107,6 +113,8 @@ RSpec.describe 'Tags' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body[:id].to_i).to eq(tag.id)
       expect(response.parsed_body[:name]).to eq(tag.name.upcase)
@@ -119,6 +127,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -127,6 +137,8 @@ RSpec.describe 'Tags' do
         get '/api/v1/admin/tags/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/trends/links/links_spec.rb

@@ -18,6 +18,8 @@ RSpec.describe 'Links' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -36,6 +38,8 @@ RSpec.describe 'Links' do
         .to change_link_trendable_to_true
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expects_correct_link_data
     end
 
@@ -60,6 +64,8 @@ RSpec.describe 'Links' do
         post '/api/v1/admin/trends/links/-1/approve', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -70,6 +76,8 @@ RSpec.describe 'Links' do
         subject
 
         expect(response).to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -89,6 +97,8 @@ RSpec.describe 'Links' do
         .to_not change_link_trendable
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     def change_link_trendable
@@ -114,6 +124,8 @@ RSpec.describe 'Links' do
         post '/api/v1/admin/trends/links/-1/reject', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -124,6 +136,8 @@ RSpec.describe 'Links' do
         subject
 
         expect(response).to have_http_status(403)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/admin/trends/links/preview_card_providers_spec.rb

@@ -16,6 +16,8 @@ RSpec.describe 'API V1 Admin Trends Links Preview Card Providers' do
       get '/api/v1/admin/trends/links/publishers', params: { account_id: account.id, limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -29,6 +31,8 @@ RSpec.describe 'API V1 Admin Trends Links Preview Card Providers' do
 
     it 'returns http success' do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -42,6 +46,8 @@ RSpec.describe 'API V1 Admin Trends Links Preview Card Providers' do
 
     it 'returns http success' do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/admin/trends/statuses_spec.rb

@@ -16,6 +16,8 @@ RSpec.describe 'API V1 Admin Trends Statuses' do
       get '/api/v1/admin/trends/statuses', params: { account_id: account.id, limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -29,6 +31,8 @@ RSpec.describe 'API V1 Admin Trends Statuses' do
 
     it 'returns http success' do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -42,6 +46,8 @@ RSpec.describe 'API V1 Admin Trends Statuses' do
 
     it 'returns http success' do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/admin/trends/tags_spec.rb

@@ -16,6 +16,8 @@ RSpec.describe 'API V1 Admin Trends Tags' do
       get '/api/v1/admin/trends/tags', params: { account_id: account.id, limit: 2 }, headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -29,6 +31,8 @@ RSpec.describe 'API V1 Admin Trends Tags' do
 
     it 'returns http success' do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -42,6 +46,8 @@ RSpec.describe 'API V1 Admin Trends Tags' do
 
     it 'returns http success' do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/announcements/reactions_spec.rb

@@ -15,7 +15,9 @@ RSpec.describe 'API V1 Announcements Reactions' do
       it 'returns http unauthorized' do
         put "/api/v1/announcements/#{announcement.id}/reactions/#{escaped_emoji}"
 
-        expect(response).to have_http_status 401
+        expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -26,6 +28,8 @@ RSpec.describe 'API V1 Announcements Reactions' do
 
       it 'creates reaction', :aggregate_failures do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(announcement.announcement_reactions.find_by(name: '😂', account: user.account)).to_not be_nil
       end
     end
@@ -39,7 +43,9 @@ RSpec.describe 'API V1 Announcements Reactions' do
     context 'without token' do
       it 'returns http unauthorized' do
         delete "/api/v1/announcements/#{announcement.id}/reactions/#{escaped_emoji}"
-        expect(response).to have_http_status 401
+        expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -50,6 +56,8 @@ RSpec.describe 'API V1 Announcements Reactions' do
 
       it 'creates reaction', :aggregate_failures do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(announcement.announcement_reactions.find_by(name: '😂', account: user.account)).to be_nil
       end
     end

spec/requests/api/v1/announcements_spec.rb

@@ -15,7 +15,9 @@ RSpec.describe 'API V1 Announcements' do
       it 'returns http unprocessable entity' do
         get '/api/v1/announcements'
 
-        expect(response).to have_http_status 422
+        expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -26,6 +28,8 @@ RSpec.describe 'API V1 Announcements' do
 
       it 'returns http success' do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -35,7 +39,9 @@ RSpec.describe 'API V1 Announcements' do
       it 'returns http unauthorized' do
         post "/api/v1/announcements/#{announcement.id}/dismiss"
 
-        expect(response).to have_http_status 401
+        expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -48,6 +54,8 @@ RSpec.describe 'API V1 Announcements' do
 
       it 'dismisses announcement', :aggregate_failures do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(announcement.announcement_mutes.find_by(account: user.account)).to_not be_nil
       end
     end

spec/requests/api/v1/annual_reports_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'API V1 Annual Reports' do
 
         expect(response)
           .to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -33,6 +35,8 @@ RSpec.describe 'API V1 Annual Reports' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_present
@@ -51,6 +55,8 @@ RSpec.describe 'API V1 Annual Reports' do
           .to change { annual_report.reload.viewed? }.to(true)
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/apps/credentials_spec.rb

@@ -17,6 +17,8 @@ RSpec.describe 'Credentials' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body).to match(
           a_hash_including(
@@ -36,6 +38,8 @@ RSpec.describe 'Credentials' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body[:client_id]).to_not be_present
         expect(response.parsed_body[:client_secret]).to_not be_present
@@ -51,6 +55,8 @@ RSpec.describe 'Credentials' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body).to match(
           a_hash_including(
@@ -74,6 +80,8 @@ RSpec.describe 'Credentials' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -86,6 +94,8 @@ RSpec.describe 'Credentials' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
 
       it 'returns the error in the json response' do
@@ -108,6 +118,8 @@ RSpec.describe 'Credentials' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body).to match(
           a_hash_including(

spec/requests/api/v1/apps_spec.rb

@@ -28,6 +28,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         app = Doorkeeper::Application.find_by(name: client_name)
 
@@ -59,6 +61,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(Doorkeeper::Application.find_by(name: client_name)).to be_present
 
         expect(response.parsed_body)
@@ -76,6 +80,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         app = Doorkeeper::Application.find_by(name: client_name)
 
@@ -96,6 +102,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -106,6 +114,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(Doorkeeper::Application.find_by(name: client_name).scopes.to_s).to eq 'read'
       end
     end
@@ -117,6 +127,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -127,6 +139,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -137,6 +151,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -148,6 +164,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -158,6 +176,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         app = Doorkeeper::Application.find_by(name: client_name)
 
@@ -180,6 +200,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         app = Doorkeeper::Application.find_by(name: client_name)
 
@@ -202,6 +224,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -212,6 +236,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -222,6 +248,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -232,6 +260,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -242,6 +272,8 @@ RSpec.describe 'Apps' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         app = Doorkeeper::Application.find_by(name: client_name)
 

spec/requests/api/v1/blocks_spec.rb

@@ -26,6 +26,8 @@ RSpec.describe 'Blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(expected_response)
     end
 
@@ -36,6 +38,8 @@ RSpec.describe 'Blocks' do
         subject
 
         expect(response.parsed_body.size).to eq(params[:limit])
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response)
           .to include_pagination_headers(
             prev: api_v1_blocks_url(limit: params[:limit], since_id: blocks.last.id),

spec/requests/api/v1/bookmarks_spec.rb

@@ -28,6 +28,8 @@ RSpec.describe 'Bookmarks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(expected_response)
     end
 
@@ -40,6 +42,8 @@ RSpec.describe 'Bookmarks' do
         expect(response.parsed_body.size)
           .to eq(params[:limit])
 
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response)
           .to include_pagination_headers(
             prev: api_v1_bookmarks_url(limit: params[:limit], min_id: bookmarks.last.id),
@@ -55,6 +59,8 @@ RSpec.describe 'Bookmarks' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/conversations_spec.rb

@@ -26,6 +26,8 @@ RSpec.describe 'API V1 Conversations' do
           prev: api_v1_conversations_url(limit: 1, min_id: Status.first.id),
           next: api_v1_conversations_url(limit: 1, max_id: Status.first.id)
         )
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     it 'returns conversations', :aggregate_failures do

spec/requests/api/v1/custom_emojis_spec.rb

@@ -18,6 +18,8 @@ RSpec.describe 'Custom Emojis' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_present
@@ -33,6 +35,8 @@ RSpec.describe 'Custom Emojis' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_present

spec/requests/api/v1/directories_spec.rb

@@ -82,6 +82,8 @@ RSpec.describe 'Directories API' do
         get '/api/v1/directory', headers: headers
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq(2)
         expect(response.parsed_body.pluck(:id)).to contain_exactly(eligible_remote_account.id.to_s, local_discoverable_account.id.to_s)
       end
@@ -101,6 +103,8 @@ RSpec.describe 'Directories API' do
         get '/api/v1/directory', headers: headers, params: { local: '1' }
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq(1)
         expect(response.parsed_body.first[:id]).to include(local_account.id.to_s)
         expect(response.body).to_not include(remote_account.id.to_s)
@@ -115,6 +119,8 @@ RSpec.describe 'Directories API' do
         get '/api/v1/directory', headers: headers, params: { order: 'active' }
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq(2)
         expect(response.parsed_body.first[:id]).to include(new_stat.account_id.to_s)
         expect(response.parsed_body.second[:id]).to include(old_stat.account_id.to_s)
@@ -130,6 +136,8 @@ RSpec.describe 'Directories API' do
         get '/api/v1/directory', headers: headers, params: { order: 'new' }
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq(2)
         expect(response.parsed_body.first[:id]).to include(account_new.id.to_s)
         expect(response.parsed_body.second[:id]).to include(account_old.id.to_s)

spec/requests/api/v1/domain_blocks_spec.rb

@@ -26,6 +26,8 @@ RSpec.describe 'Domain blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(blocked_domains)
     end
 
@@ -53,6 +55,8 @@ RSpec.describe 'Domain blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.domain_blocking?(params[:domain])).to be(true)
     end
 
@@ -63,6 +67,8 @@ RSpec.describe 'Domain blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -73,6 +79,8 @@ RSpec.describe 'Domain blocks' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -94,6 +102,8 @@ RSpec.describe 'Domain blocks' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(user.account.domain_blocking?('example.com')).to be(false)
     end
 
@@ -104,6 +114,8 @@ RSpec.describe 'Domain blocks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/emails/confirmations_spec.rb

@@ -26,6 +26,8 @@ RSpec.describe 'Confirmations' do
           subject
 
           expect(response).to have_http_status(403)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -41,6 +43,8 @@ RSpec.describe 'Confirmations' do
             subject
 
             expect(response).to have_http_status(403)
+            expect(response.content_type)
+              .to start_with('application/json')
           end
 
           context 'when user changed e-mail and has not confirmed it' do
@@ -52,6 +56,8 @@ RSpec.describe 'Confirmations' do
               subject
 
               expect(response).to have_http_status(200)
+              expect(response.content_type)
+                .to start_with('application/json')
             end
           end
         end
@@ -61,6 +67,8 @@ RSpec.describe 'Confirmations' do
             subject
 
             expect(response).to have_http_status(200)
+            expect(response.content_type)
+              .to start_with('application/json')
           end
         end
 
@@ -71,6 +79,8 @@ RSpec.describe 'Confirmations' do
             subject
 
             expect(response).to have_http_status(200)
+            expect(response.content_type)
+              .to start_with('application/json')
             expect(user.reload.unconfirmed_email).to eq('foo@bar.com')
           end
         end
@@ -82,6 +92,8 @@ RSpec.describe 'Confirmations' do
             subject
 
             expect(response).to have_http_status(422)
+            expect(response.content_type)
+              .to start_with('application/json')
           end
         end
       end
@@ -94,6 +106,8 @@ RSpec.describe 'Confirmations' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -111,6 +125,8 @@ RSpec.describe 'Confirmations' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body).to be false
         end
       end
@@ -122,6 +138,8 @@ RSpec.describe 'Confirmations' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body).to be true
         end
       end
@@ -139,6 +157,8 @@ RSpec.describe 'Confirmations' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body).to be false
         end
       end
@@ -150,6 +170,8 @@ RSpec.describe 'Confirmations' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body).to be true
         end
       end
@@ -162,6 +184,8 @@ RSpec.describe 'Confirmations' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/endorsements_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'Endorsements' do
 
         expect(response)
           .to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -36,6 +38,8 @@ RSpec.describe 'Endorsements' do
 
           expect(response)
             .to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(response.parsed_body)
             .to be_present
@@ -51,6 +55,8 @@ RSpec.describe 'Endorsements' do
 
           expect(response)
             .to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(response.parsed_body)
             .to_not be_present

spec/requests/api/v1/favourites_spec.rb

@@ -28,6 +28,8 @@ RSpec.describe 'Favourites' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(expected_response)
     end
 
@@ -43,6 +45,8 @@ RSpec.describe 'Favourites' do
             prev: api_v1_favourites_url(limit: params[:limit], min_id: favourites.last.id),
             next: api_v1_favourites_url(limit: params[:limit], max_id: favourites.second.id)
           )
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -53,6 +57,8 @@ RSpec.describe 'Favourites' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/featured_tags/suggestions_spec.rb

@@ -32,6 +32,8 @@ RSpec.describe 'Featured Tags Suggestions API' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body)
         .to contain_exactly(
           include(name: used_tag.name)

spec/requests/api/v1/featured_tags_spec.rb

@@ -22,6 +22,8 @@ RSpec.describe 'FeaturedTags' do
         get '/api/v1/featured_tags'
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -29,6 +31,8 @@ RSpec.describe 'FeaturedTags' do
       get '/api/v1/featured_tags', headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when the requesting user has no featured tag' do
@@ -62,6 +66,8 @@ RSpec.describe 'FeaturedTags' do
       post '/api/v1/featured_tags', headers: headers, params: params
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body)
         .to include(
           name: params[:name]
@@ -89,6 +95,8 @@ RSpec.describe 'FeaturedTags' do
         post '/api/v1/featured_tags', params: params
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -97,6 +105,8 @@ RSpec.describe 'FeaturedTags' do
         post '/api/v1/featured_tags', headers: headers
 
         expect(response).to have_http_status(400)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -107,6 +117,8 @@ RSpec.describe 'FeaturedTags' do
         post '/api/v1/featured_tags', headers: headers, params: params
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -119,6 +131,8 @@ RSpec.describe 'FeaturedTags' do
         post '/api/v1/featured_tags', headers: headers, params: params
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -131,6 +145,8 @@ RSpec.describe 'FeaturedTags' do
       delete "/api/v1/featured_tags/#{id}", headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to be_empty
 
       featured_tag = FeaturedTag.find_by(id: id)
@@ -150,6 +166,8 @@ RSpec.describe 'FeaturedTags' do
         delete "/api/v1/featured_tags/#{id}"
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -158,6 +176,8 @@ RSpec.describe 'FeaturedTags' do
         delete '/api/v1/featured_tags/0', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -169,6 +189,8 @@ RSpec.describe 'FeaturedTags' do
         delete "/api/v1/featured_tags/#{id}", headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/filters_spec.rb

@@ -15,6 +15,8 @@ RSpec.describe 'API V1 Filters' do
     it 'returns http success' do
       get '/api/v1/filters', headers: headers
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body)
         .to contain_exactly(
           include(id: custom_filter_keyword.id.to_s)
@@ -35,6 +37,8 @@ RSpec.describe 'API V1 Filters' do
       filter = user.account.custom_filters.first
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(filter).to_not be_nil
       expect(filter.keywords.pluck(:keyword, :whole_word)).to eq [['magic', whole_word]]
       expect(filter.context).to eq %w(home)
@@ -50,6 +54,8 @@ RSpec.describe 'API V1 Filters' do
         filter = user.account.custom_filters.first
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(filter).to_not be_nil
         expect(filter.keywords.pluck(:keyword, :whole_word)).to eq [['magic', whole_word]]
         expect(filter.context).to eq %w(home)
@@ -68,6 +74,8 @@ RSpec.describe 'API V1 Filters' do
       get "/api/v1/filters/#{keyword.id}", headers: headers
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -82,6 +90,8 @@ RSpec.describe 'API V1 Filters' do
 
     it 'updates the filter', :aggregate_failures do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(keyword.reload.phrase).to eq 'updated'
     end
   end
@@ -97,6 +107,8 @@ RSpec.describe 'API V1 Filters' do
 
     it 'removes the filter', :aggregate_failures do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect { keyword.reload }.to raise_error ActiveRecord::RecordNotFound
     end
   end

spec/requests/api/v1/follow_requests_spec.rb

@@ -36,6 +36,8 @@ RSpec.describe 'Follow requests' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(expected_response)
     end
 
@@ -66,6 +68,8 @@ RSpec.describe 'Follow requests' do
     it 'allows the requesting follower to follow', :aggregate_failures do
       expect { subject }.to change { follower.following?(user.account) }.from(false).to(true)
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body[:followed_by]).to be true
     end
   end
@@ -87,6 +91,8 @@ RSpec.describe 'Follow requests' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(FollowRequest.where(target_account: user.account, account: follower)).to_not exist
       expect(response.parsed_body[:followed_by]).to be false
     end

spec/requests/api/v1/followed_tags_spec.rb

@@ -32,20 +32,20 @@ RSpec.describe 'Followed tags' do
       subject
 
       expect(response).to have_http_status(:success)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(expected_response)
     end
 
     context 'with limit param' do
       let(:params) { { limit: 1 } }
 
-      it 'returns only the requested number of follow tags' do
+      it 'returns only the requested number of follow tags and sets pagination headers' do
         subject
 
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq(params[:limit])
-      end
-
-      it 'sets the correct pagination headers' do
-        subject
 
         expect(response)
           .to include_pagination_headers(

spec/requests/api/v1/instance_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'Instances' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_present
@@ -27,6 +29,8 @@ RSpec.describe 'Instances' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_present

spec/requests/api/v1/instances/activity_spec.rb

@@ -13,6 +13,9 @@ RSpec.describe 'Activity' do
         expect(response)
           .to have_http_status(200)
 
+        expect(response.content_type)
+          .to start_with('application/json')
+
         expect(response.parsed_body)
           .to be_present
           .and(be_an(Array))

spec/requests/api/v1/instances/domain_blocks_spec.rb

@@ -17,6 +17,9 @@ RSpec.describe 'Domain Blocks' do
         expect(response)
           .to have_http_status(200)
 
+        expect(response.content_type)
+          .to start_with('application/json')
+
         expect(response.parsed_body)
           .to be_present
           .and(be_an(Array))

spec/requests/api/v1/instances/extended_descriptions_spec.rb

@@ -9,6 +9,8 @@ RSpec.describe 'Extended Descriptions' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body)
         .to be_present

spec/requests/api/v1/instances/languages_spec.rb

@@ -10,6 +10,8 @@ RSpec.describe 'Languages' do
 
     it 'returns http success and includes supported languages' do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body.pluck(:code)).to match_array LanguagesHelper::SUPPORTED_LOCALES.keys.map(&:to_s)
     end
   end

spec/requests/api/v1/instances/peers_spec.rb

@@ -12,6 +12,8 @@ RSpec.describe 'Peers' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to be_an(Array)

spec/requests/api/v1/instances/privacy_policies_spec.rb

@@ -9,6 +9,8 @@ RSpec.describe 'Privacy Policy' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body)
         .to be_present

spec/requests/api/v1/instances/rules_spec.rb

@@ -9,6 +9,8 @@ RSpec.describe 'Rules' do
 
       expect(response)
         .to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(response.parsed_body)
         .to be_an(Array)

spec/requests/api/v1/instances/translation_languages_spec.rb

@@ -10,6 +10,8 @@ RSpec.describe 'Translation Languages' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to eq({})
@@ -24,6 +26,8 @@ RSpec.describe 'Translation Languages' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body)
           .to match({ und: %w(en de), en: ['de'] })

spec/requests/api/v1/lists/accounts_spec.rb

@@ -34,6 +34,8 @@ RSpec.describe 'Accounts' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(expected_response)
     end
 
@@ -68,6 +70,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(list.accounts).to include(bob)
       end
     end
@@ -81,6 +85,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(list.accounts).to include(bob)
       end
     end
@@ -90,6 +96,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(list.accounts).to_not include(bob)
       end
     end
@@ -105,6 +113,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -118,6 +128,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -143,6 +155,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(list.accounts).to_not include(bob)
         expect(list.accounts).to include(peter)
       end
@@ -154,6 +168,8 @@ RSpec.describe 'Accounts' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(list.accounts).to contain_exactly(bob, peter)
         end
       end
@@ -167,6 +183,8 @@ RSpec.describe 'Accounts' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/lists_spec.rb

@@ -43,6 +43,8 @@ RSpec.describe 'Lists' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match_array(expected_response)
     end
   end
@@ -60,6 +62,8 @@ RSpec.describe 'Lists' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match({
         id: list.id.to_s,
         title: list.title,
@@ -75,6 +79,8 @@ RSpec.describe 'Lists' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -83,6 +89,8 @@ RSpec.describe 'Lists' do
         get '/api/v1/lists/-1', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -100,6 +108,8 @@ RSpec.describe 'Lists' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match(a_hash_including(title: 'my list', replies_policy: 'none', exclusive: true))
       expect(List.where(account: user.account).count).to eq(1)
     end
@@ -111,6 +121,8 @@ RSpec.describe 'Lists' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -121,6 +133,8 @@ RSpec.describe 'Lists' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -142,6 +156,8 @@ RSpec.describe 'Lists' do
         .and change_list_exclusive
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       list.reload
 
       expect(response.parsed_body).to match({
@@ -169,6 +185,8 @@ RSpec.describe 'Lists' do
         put '/api/v1/lists/-1', headers: headers, params: params
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -179,6 +197,8 @@ RSpec.describe 'Lists' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -196,6 +216,8 @@ RSpec.describe 'Lists' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(List.where(id: list.id)).to_not exist
     end
 
@@ -214,6 +236,8 @@ RSpec.describe 'Lists' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/markers_spec.rb

@@ -18,6 +18,8 @@ RSpec.describe 'API Markers' do
 
     it 'returns markers', :aggregate_failures do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body)
         .to include(
           home: include(last_read_id: '123'),
@@ -34,6 +36,8 @@ RSpec.describe 'API Markers' do
 
       it 'creates a marker', :aggregate_failures do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.markers.first.timeline).to eq 'home'
         expect(user.markers.first.last_read_id).to eq 69_420
       end
@@ -47,6 +51,8 @@ RSpec.describe 'API Markers' do
 
       it 'updates a marker', :aggregate_failures do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.markers.first.timeline).to eq 'home'
         expect(user.markers.first.last_read_id).to eq 70_120
       end
@@ -61,6 +67,8 @@ RSpec.describe 'API Markers' do
       it 'returns error json' do
         expect(response)
           .to have_http_status(409)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body)
           .to include(error: /Conflict during update/)
       end

spec/requests/api/v1/media_spec.rb

@@ -21,6 +21,8 @@ RSpec.describe 'Media' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match(
         a_hash_including(
           id: media.id.to_s,
@@ -39,6 +41,8 @@ RSpec.describe 'Media' do
         subject
 
         expect(response).to have_http_status(206)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -49,6 +53,8 @@ RSpec.describe 'Media' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -59,6 +65,8 @@ RSpec.describe 'Media' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -75,6 +83,8 @@ RSpec.describe 'Media' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(MediaAttachment.first).to be_present
         expect(MediaAttachment.first).to have_attached_file(:file)
 
@@ -102,6 +112,8 @@ RSpec.describe 'Media' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -112,6 +124,8 @@ RSpec.describe 'Media' do
           subject
 
           expect(response).to have_http_status(500)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end
@@ -153,6 +167,8 @@ RSpec.describe 'Media' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -171,6 +187,8 @@ RSpec.describe 'Media' do
           subject
 
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end

spec/requests/api/v1/mutes_spec.rb

@@ -22,6 +22,8 @@ RSpec.describe 'Mutes' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       muted_accounts = mutes.map(&:target_account)
       expect(response.parsed_body.pluck(:id)).to match_array(muted_accounts.map { |account| account.id.to_s })
@@ -34,6 +36,8 @@ RSpec.describe 'Mutes' do
         subject
 
         expect(response.parsed_body.size).to eq(params[:limit])
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response)
           .to include_pagination_headers(
             prev: api_v1_mutes_url(limit: params[:limit], since_id: mutes.last.id),
@@ -71,6 +75,8 @@ RSpec.describe 'Mutes' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/notifications/policies_spec.rb

@@ -26,6 +26,8 @@ RSpec.describe 'Policies' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to include(
           filter_not_following: false,
           filter_not_followers: false,
@@ -54,6 +56,8 @@ RSpec.describe 'Policies' do
         .to change { NotificationPolicy.find_or_initialize_by(account: user.account).for_not_following.to_sym }.from(:accept).to(:filter)
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to include(
         filter_not_following: true,
         filter_not_followers: false,

spec/requests/api/v1/notifications/requests_spec.rb

@@ -26,6 +26,8 @@ RSpec.describe 'Requests' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -43,6 +45,8 @@ RSpec.describe 'Requests' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(NotificationPermission.find_by(account: notification_request.account, from_account: notification_request.from_account)).to_not be_nil
     end
 
@@ -53,6 +57,8 @@ RSpec.describe 'Requests' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -70,6 +76,8 @@ RSpec.describe 'Requests' do
       expect { subject }.to change(NotificationRequest, :count).by(-1)
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when notification request belongs to someone else' do
@@ -79,6 +87,8 @@ RSpec.describe 'Requests' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -97,6 +107,8 @@ RSpec.describe 'Requests' do
 
       expect(NotificationPermission.find_by(account: notification_request.account, from_account: notification_request.from_account)).to_not be_nil
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -113,6 +125,8 @@ RSpec.describe 'Requests' do
       expect { subject }.to change(NotificationRequest, :count).by(-1)
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 
@@ -128,6 +142,8 @@ RSpec.describe 'Requests' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to match({ merged: true })
       end
     end
@@ -141,6 +157,8 @@ RSpec.describe 'Requests' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to match({ merged: false })
       end
     end

spec/requests/api/v1/notifications_spec.rb

@@ -31,6 +31,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:count]).to eq 5
       end
     end
@@ -45,6 +47,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:count]).to eq 2
       end
     end
@@ -56,6 +60,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:count]).to eq 4
       end
     end
@@ -67,6 +73,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:count]).to eq 2
       end
     end
@@ -80,6 +88,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:count]).to eq Api::V1::NotificationsController::DEFAULT_NOTIFICATIONS_COUNT_LIMIT
       end
     end
@@ -111,6 +121,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq 5
         expect(body_json_types).to include('reblog', 'mention', 'favourite', 'follow')
         expect(response.parsed_body.any? { |x| x[:filtered] }).to be false
@@ -124,6 +136,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq 6
         expect(body_json_types).to include('reblog', 'mention', 'favourite', 'follow')
         expect(response.parsed_body.any? { |x| x[:filtered] }).to be true
@@ -137,6 +151,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(body_json_account_ids.uniq).to eq [tom.account.id.to_s]
       end
 
@@ -152,6 +168,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to eq 0
       end
     end
@@ -163,6 +181,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to_not eq 0
         expect(body_json_types.uniq).to_not include 'mention'
       end
@@ -175,6 +195,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(body_json_types.uniq).to eq ['mention']
       end
     end
@@ -216,6 +238,8 @@ RSpec.describe 'Notifications' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
 
     context 'when notification belongs to someone else' do
@@ -225,6 +249,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -242,6 +268,8 @@ RSpec.describe 'Notifications' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect { notification.reload }.to raise_error(ActiveRecord::RecordNotFound)
     end
 
@@ -252,6 +280,8 @@ RSpec.describe 'Notifications' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -272,6 +302,8 @@ RSpec.describe 'Notifications' do
 
       expect(user.account.reload.notifications).to be_empty
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
     end
   end
 end

spec/requests/api/v1/peers/search_spec.rb

@@ -23,6 +23,8 @@ RSpec.describe 'API Peers Search' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body)
           .to be_blank
       end
@@ -34,6 +36,8 @@ RSpec.describe 'API Peers Search' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body)
           .to be_blank
       end
@@ -49,6 +53,8 @@ RSpec.describe 'API Peers Search' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size)
           .to eq(1)
         expect(response.parsed_body.first)

spec/requests/api/v1/polls/votes_spec.rb

@@ -18,6 +18,8 @@ RSpec.describe 'API V1 Polls Votes' do
 
     it 'creates a vote', :aggregate_failures do
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
 
       expect(vote).to_not be_nil
       expect(vote.choice).to eq 1
@@ -30,6 +32,8 @@ RSpec.describe 'API V1 Polls Votes' do
 
       it 'returns http bad request' do
         expect(response).to have_http_status(400)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 

spec/requests/api/v1/polls_spec.rb

@@ -23,6 +23,8 @@ RSpec.describe 'Polls' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to match(
           a_hash_including(
             id: poll.id.to_s,
@@ -41,6 +43,8 @@ RSpec.describe 'Polls' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/preferences_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'Preferences' do
 
         expect(response)
           .to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -34,6 +36,9 @@ RSpec.describe 'Preferences' do
         expect(response)
           .to have_http_status(200)
 
+        expect(response.content_type)
+          .to start_with('application/json')
+
         expect(response.parsed_body)
           .to be_present
       end

spec/requests/api/v1/profiles_spec.rb

@@ -32,6 +32,8 @@ RSpec.describe 'Deleting profile images' do
         delete '/api/v1/profile/avatar', headers: headers
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         account.reload
         expect(account.avatar).to_not exist
@@ -53,6 +55,8 @@ RSpec.describe 'Deleting profile images' do
         delete '/api/v1/profile/header', headers: headers
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         account.reload
         expect(account.avatar).to exist

spec/requests/api/v1/push/subscriptions_spec.rb

@@ -45,6 +45,8 @@ RSpec.describe 'API V1 Push Subscriptions' do
       subject
 
       expect(response).to have_http_status(422)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(endpoint_push_subscriptions.count).to eq(0)
       expect(endpoint_push_subscription).to be_nil
     end

spec/requests/api/v1/reports_spec.rb

@@ -37,6 +37,8 @@ RSpec.describe 'Reports' do
       emails = capture_emails { subject }
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body).to match(
         a_hash_including(
           status_ids: [status.id.to_s],
@@ -65,6 +67,8 @@ RSpec.describe 'Reports' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 

spec/requests/api/v1/scheduled_status_spec.rb

@@ -14,6 +14,8 @@ RSpec.describe 'Scheduled Statuses' do
 
         expect(response)
           .to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -33,6 +35,8 @@ RSpec.describe 'Scheduled Statuses' do
 
         expect(response)
           .to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -45,6 +49,8 @@ RSpec.describe 'Scheduled Statuses' do
 
           expect(response)
             .to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(response.parsed_body)
             .to_not be_present
@@ -59,6 +65,8 @@ RSpec.describe 'Scheduled Statuses' do
 
           expect(response)
             .to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(response.parsed_body)
             .to be_present

spec/requests/api/v1/statuses/bookmarks_spec.rb

@@ -22,6 +22,8 @@ RSpec.describe 'Bookmarks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.account.bookmarked?(status)).to be true
 
         expect(response.parsed_body).to match(
@@ -37,6 +39,8 @@ RSpec.describe 'Bookmarks' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -51,6 +55,8 @@ RSpec.describe 'Bookmarks' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.account.bookmarked?(status)).to be true
       end
     end
@@ -60,6 +66,8 @@ RSpec.describe 'Bookmarks' do
         post '/api/v1/statuses/-1/bookmark', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -70,6 +78,8 @@ RSpec.describe 'Bookmarks' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -93,6 +103,8 @@ RSpec.describe 'Bookmarks' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(user.account.bookmarked?(status)).to be false
 
           expect(response.parsed_body).to match(
@@ -113,6 +125,8 @@ RSpec.describe 'Bookmarks' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(user.account.bookmarked?(status)).to be false
 
           expect(response.parsed_body).to match(
@@ -126,6 +140,8 @@ RSpec.describe 'Bookmarks' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end
@@ -137,6 +153,8 @@ RSpec.describe 'Bookmarks' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/statuses/favourited_by_accounts_spec.rb

@@ -33,6 +33,8 @@ RSpec.describe 'API V1 Statuses Favourited by Accounts' do
             prev: api_v1_status_favourited_by_index_url(limit: 2, since_id: Favourite.last.id),
             next: api_v1_status_favourited_by_index_url(limit: 2, max_id: Favourite.first.id)
           )
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body.size)
           .to eq(2)
@@ -72,6 +74,8 @@ RSpec.describe 'API V1 Statuses Favourited by Accounts' do
           subject
 
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end
@@ -88,6 +92,8 @@ RSpec.describe 'API V1 Statuses Favourited by Accounts' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end

spec/requests/api/v1/statuses/favourites_spec.rb

@@ -22,6 +22,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.account.favourited?(status)).to be true
 
         expect(response.parsed_body).to match(
@@ -37,6 +39,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -51,6 +55,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.account.favourited?(status)).to be true
       end
     end
@@ -62,6 +68,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -84,6 +92,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(user.account.favourited?(status)).to be false
 
@@ -103,6 +113,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(user.account.favourited?(status)).to be false
 
@@ -117,6 +129,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -127,6 +141,8 @@ RSpec.describe 'Favourites', :inline_jobs do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/statuses/histories_spec.rb

@@ -18,6 +18,8 @@ RSpec.describe 'API V1 Statuses Histories' do
 
       it 'returns http success' do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.size).to_not be 0
       end
     end

spec/requests/api/v1/statuses/mutes_spec.rb

@@ -18,6 +18,8 @@ RSpec.describe 'API V1 Statuses Mutes' do
 
       it 'creates a conversation mute', :aggregate_failures do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(ConversationMute.find_by(account: user.account, conversation_id: status.conversation_id)).to_not be_nil
       end
     end
@@ -32,6 +34,8 @@ RSpec.describe 'API V1 Statuses Mutes' do
 
       it 'destroys the conversation mute', :aggregate_failures do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(ConversationMute.find_by(account: user.account, conversation_id: status.conversation_id)).to be_nil
       end
     end

spec/requests/api/v1/statuses/pins_spec.rb

@@ -22,6 +22,8 @@ RSpec.describe 'Pins' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.account.pinned?(status)).to be true
 
         expect(response.parsed_body).to match(
@@ -37,6 +39,8 @@ RSpec.describe 'Pins' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.account.pinned?(status)).to be true
       end
     end
@@ -48,6 +52,8 @@ RSpec.describe 'Pins' do
         subject
 
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -56,6 +62,8 @@ RSpec.describe 'Pins' do
         post '/api/v1/statuses/-1/pin', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -66,6 +74,8 @@ RSpec.describe 'Pins' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -86,6 +96,8 @@ RSpec.describe 'Pins' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(user.account.pinned?(status)).to be false
 
         expect(response.parsed_body).to match(
@@ -99,6 +111,8 @@ RSpec.describe 'Pins' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -107,6 +121,8 @@ RSpec.describe 'Pins' do
         post '/api/v1/statuses/-1/unpin', headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -117,6 +133,8 @@ RSpec.describe 'Pins' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/statuses/reblogged_by_accounts_spec.rb

@@ -32,6 +32,8 @@ RSpec.describe 'API V1 Statuses Reblogged by Accounts' do
             prev: api_v1_status_reblogged_by_index_url(limit: 2, since_id: bob.statuses.first.id),
             next: api_v1_status_reblogged_by_index_url(limit: 2, max_id: alice.statuses.first.id)
           )
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body.size)
           .to eq(2)
@@ -71,6 +73,8 @@ RSpec.describe 'API V1 Statuses Reblogged by Accounts' do
           subject
 
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end
@@ -87,6 +91,8 @@ RSpec.describe 'API V1 Statuses Reblogged by Accounts' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end

spec/requests/api/v1/statuses/reblogs_spec.rb

@@ -19,6 +19,8 @@ RSpec.describe 'API V1 Statuses Reblogs' do
       context 'with public status' do
         it 'reblogs the status', :aggregate_failures do
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(status.reblogs.count).to eq 1
 
@@ -40,6 +42,8 @@ RSpec.describe 'API V1 Statuses Reblogs' do
 
         it 'returns http not found' do
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end
@@ -55,6 +59,8 @@ RSpec.describe 'API V1 Statuses Reblogs' do
 
         it 'destroys the reblog', :aggregate_failures do
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(status.reblogs.count).to eq 0
 
@@ -80,6 +86,8 @@ RSpec.describe 'API V1 Statuses Reblogs' do
 
         it 'destroys the reblog', :aggregate_failures do
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
 
           expect(status.reblogs.count).to eq 0
 
@@ -103,6 +111,8 @@ RSpec.describe 'API V1 Statuses Reblogs' do
 
         it 'returns http not found' do
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end

spec/requests/api/v1/statuses/sources_spec.rb

@@ -22,6 +22,8 @@ RSpec.describe 'Sources' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to match({
           id: status.id.to_s,
           text: status.text,
@@ -37,6 +39,8 @@ RSpec.describe 'Sources' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -51,6 +55,8 @@ RSpec.describe 'Sources' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to match({
           id: status.id.to_s,
           text: status.text,
@@ -66,6 +72,8 @@ RSpec.describe 'Sources' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/statuses/translations_spec.rb

@@ -20,6 +20,8 @@ RSpec.describe 'API V1 Statuses Translations' do
 
       it 'returns http unprocessable entity' do
         expect(response).to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -38,6 +40,8 @@ RSpec.describe 'API V1 Statuses Translations' do
 
       it 'returns http success' do
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/statuses_spec.rb

@@ -18,6 +18,8 @@ RSpec.describe '/api/v1/statuses' do
         get '/api/v1/statuses', headers: headers, params: { id: [status.id, other_status.id, 123_123] }
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body).to contain_exactly(
           hash_including(id: status.id.to_s),
           hash_including(id: other_status.id.to_s)
@@ -39,6 +41,8 @@ RSpec.describe '/api/v1/statuses' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
 
       context 'when post includes filtered terms' do
@@ -52,6 +56,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body[:filtered][0]).to include({
             filter: a_hash_including({
               id: user.account.custom_filters.first.id.to_s,
@@ -75,6 +81,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body[:filtered][0]).to include({
             filter: a_hash_including({
               id: user.account.custom_filters.first.id.to_s,
@@ -97,6 +105,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body[:reblog][:filtered][0]).to include({
             filter: a_hash_including({
               id: user.account.custom_filters.first.id.to_s,
@@ -121,6 +131,8 @@ RSpec.describe '/api/v1/statuses' do
         get "/api/v1/statuses/#{status.id}/context", headers: headers
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -139,6 +151,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.headers['X-RateLimit-Limit']).to eq RateLimiter::FAMILIES[:statuses][:limit].to_s
           expect(response.headers['X-RateLimit-Remaining']).to eq (RateLimiter::FAMILIES[:statuses][:limit] - 1).to_s
         end
@@ -154,6 +168,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body[:unexpected_accounts].map { |a| a.slice(:id, :acct) }).to match [{ id: bob.id.to_s, acct: bob.acct }]
         end
       end
@@ -165,6 +181,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.headers['X-RateLimit-Limit']).to eq RateLimiter::FAMILIES[:statuses][:limit].to_s
         end
       end
@@ -179,6 +197,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(429)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.headers['X-RateLimit-Limit']).to eq RateLimiter::FAMILIES[:statuses][:limit].to_s
           expect(response.headers['X-RateLimit-Remaining']).to eq '0'
         end
@@ -191,6 +211,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -202,6 +224,8 @@ RSpec.describe '/api/v1/statuses' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
 
         it 'creates a scheduled status' do
@@ -215,6 +239,8 @@ RSpec.describe '/api/v1/statuses' do
             subject
 
             expect(response).to have_http_status(422)
+            expect(response.content_type)
+              .to start_with('application/json')
             expect(account.scheduled_statuses).to be_empty
           end
         end
@@ -235,6 +261,8 @@ RSpec.describe '/api/v1/statuses' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(Status.find_by(id: status.id)).to be_nil
       end
     end
@@ -253,6 +281,8 @@ RSpec.describe '/api/v1/statuses' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(status.reload.text).to eq 'I am updated'
       end
     end
@@ -267,6 +297,8 @@ RSpec.describe '/api/v1/statuses' do
           get "/api/v1/statuses/#{status.id}"
 
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -279,6 +311,8 @@ RSpec.describe '/api/v1/statuses' do
           get "/api/v1/statuses/#{status.id}/context"
 
           expect(response).to have_http_status(404)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end
@@ -291,6 +325,8 @@ RSpec.describe '/api/v1/statuses' do
           get "/api/v1/statuses/#{status.id}"
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -303,6 +339,8 @@ RSpec.describe '/api/v1/statuses' do
           get "/api/v1/statuses/#{status.id}/context"
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end

spec/requests/api/v1/streaming_spec.rb

@@ -17,6 +17,8 @@ RSpec.describe 'API V1 Streaming' do
         get '/api/v1/streaming'
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/suggestions_spec.rb

@@ -27,6 +27,8 @@ RSpec.describe 'Suggestions' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body)
         .to contain_exactly(include(id: bob.id.to_s), include(id: jeff.id.to_s))
     end
@@ -48,6 +50,8 @@ RSpec.describe 'Suggestions' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -71,6 +75,8 @@ RSpec.describe 'Suggestions' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(FollowRecommendationMute.exists?(account: user.account, target_account: jeff)).to be true
     end
 

spec/requests/api/v1/tags_spec.rb

@@ -21,6 +21,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body[:name]).to eq(name)
       end
     end
@@ -32,6 +34,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -42,6 +46,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -61,6 +67,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(:success)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(TagFollow.where(tag: tag, account: user.account)).to exist
       end
     end
@@ -72,6 +80,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(Tag.where(name: name)).to exist
         expect(TagFollow.where(tag: Tag.find_by(name: name), account: user.account)).to exist
       end
@@ -84,6 +94,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -95,6 +107,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -117,6 +131,8 @@ RSpec.describe 'Tags' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(TagFollow.where(tag: tag, account: user.account)).to_not exist
     end
 
@@ -127,6 +143,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -138,6 +156,8 @@ RSpec.describe 'Tags' do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/timelines/home_spec.rb

@@ -35,6 +35,8 @@ RSpec.describe 'Home', :inline_jobs do
         subject
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
 
         expect(response.parsed_body.pluck(:id)).to match_array(home_statuses.map { |status| status.id.to_s })
       end
@@ -52,6 +54,8 @@ RSpec.describe 'Home', :inline_jobs do
               prev: api_v1_timelines_home_url(limit: params[:limit], min_id: ana.statuses.first.id),
               next: api_v1_timelines_home_url(limit: params[:limit], max_id: ana.statuses.first.id)
             )
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
     end
@@ -67,6 +71,8 @@ RSpec.describe 'Home', :inline_jobs do
         subject
 
         expect(response).to have_http_status(206)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -77,6 +83,8 @@ RSpec.describe 'Home', :inline_jobs do
         subject
 
         expect(response).to have_http_status(401)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -89,6 +97,8 @@ RSpec.describe 'Home', :inline_jobs do
         expect(response)
           .to have_http_status(422)
           .and not_have_http_link_header
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/timelines/link_spec.rb

@@ -13,6 +13,8 @@ RSpec.describe 'Link' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body.pluck(:id)).to match_array(expected_statuses.map { |status| status.id.to_s })
     end
   end
@@ -50,6 +52,8 @@ RSpec.describe 'Link' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -62,6 +66,8 @@ RSpec.describe 'Link' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -74,6 +80,8 @@ RSpec.describe 'Link' do
         subject
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -91,6 +99,8 @@ RSpec.describe 'Link' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -101,6 +111,8 @@ RSpec.describe 'Link' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -127,6 +139,8 @@ RSpec.describe 'Link' do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body.size).to eq(params[:limit])
 
           expect(response)

spec/requests/api/v1/timelines/list_spec.rb

@@ -23,6 +23,8 @@ RSpec.describe 'API V1 Timelines List' do
         get "/api/v1/timelines/list/#{list.id}", headers: headers
 
         expect(response).to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end
@@ -36,6 +38,8 @@ RSpec.describe 'API V1 Timelines List' do
         get "/api/v1/timelines/list/#{list.id}", headers: headers
 
         expect(response).to have_http_status(404)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
   end

spec/requests/api/v1/timelines/public_spec.rb

@@ -13,6 +13,8 @@ RSpec.describe 'Public' do
       subject
 
       expect(response).to have_http_status(200)
+      expect(response.content_type)
+        .to start_with('application/json')
       expect(response.parsed_body.pluck(:id)).to match_array(expected_statuses.map { |status| status.id.to_s })
     end
   end
@@ -77,15 +79,13 @@ RSpec.describe 'Public' do
       context 'with limit param' do
         let(:params) { { limit: 1 } }
 
-        it 'returns only the requested number of statuses', :aggregate_failures do
+        it 'returns only the requested number of statuses and sets pagination headers', :aggregate_failures do
           subject
 
           expect(response).to have_http_status(200)
+          expect(response.content_type)
+            .to start_with('application/json')
           expect(response.parsed_body.size).to eq(params[:limit])
-        end
-
-        it 'sets the correct pagination headers', :aggregate_failures do
-          subject
 
           expect(response)
             .to include_pagination_headers(
@@ -110,6 +110,8 @@ RSpec.describe 'Public' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 
@@ -120,6 +122,8 @@ RSpec.describe 'Public' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 

spec/requests/api/v1/timelines/tag_spec.rb

@@ -19,6 +19,8 @@ RSpec.describe 'Tag' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
         expect(response.parsed_body.pluck(:id))
           .to match_array(expected_statuses.map { |status| status.id.to_s })
           .and not_include(private_status.id)
@@ -81,6 +83,8 @@ RSpec.describe 'Tag' do
             prev: api_v1_timelines_tag_url(limit: params[:limit], min_id: love_status.id),
             next: api_v1_timelines_tag_url(limit: params[:limit], max_id: love_status.id)
           )
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -107,6 +111,8 @@ RSpec.describe 'Tag' do
           subject
 
           expect(response).to have_http_status(422)
+          expect(response.content_type)
+            .to start_with('application/json')
         end
       end
 

spec/requests/api/v1/trends/links_spec.rb

@@ -13,6 +13,8 @@ RSpec.describe 'API V1 Trends Links' do
         expect(response)
           .to have_http_status(200)
           .and not_have_http_link_header
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -27,6 +29,8 @@ RSpec.describe 'API V1 Trends Links' do
         expect(response)
           .to have_http_status(200)
           .and have_http_link_header(api_v1_trends_links_url(offset: 2)).for(rel: 'next')
+        expect(response.content_type)
+          .to start_with('application/json')
       end
 
       def prepare_trends

spec/requests/api/v1/trends/statuses_spec.rb

@@ -13,6 +13,8 @@ RSpec.describe 'API V1 Trends Statuses' do
         expect(response)
           .to have_http_status(200)
           .and not_have_http_link_header
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -27,6 +29,8 @@ RSpec.describe 'API V1 Trends Statuses' do
         expect(response)
           .to have_http_status(200)
           .and have_http_link_header(api_v1_trends_statuses_url(offset: 2)).for(rel: 'next')
+        expect(response.content_type)
+          .to start_with('application/json')
       end
 
       def prepare_trends

spec/requests/api/v1/trends/tags_spec.rb

@@ -13,6 +13,8 @@ RSpec.describe 'API V1 Trends Tags' do
         expect(response)
           .to have_http_status(200)
           .and not_have_http_link_header
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -27,6 +29,8 @@ RSpec.describe 'API V1 Trends Tags' do
         expect(response)
           .to have_http_status(200)
           .and have_http_link_header(api_v1_trends_tags_url(offset: 2)).for(rel: 'next')
+        expect(response.content_type)
+          .to start_with('application/json')
       end
 
       def prepare_trends

spec/requests/api/web/settings_spec.rb

@@ -17,6 +17,8 @@ RSpec.describe '/api/web/settings' do
 
         expect(response)
           .to have_http_status(200)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end
 
@@ -29,6 +31,8 @@ RSpec.describe '/api/web/settings' do
 
         expect(response)
           .to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
       end
     end