donphan/spec/helpers/application_helper_spec.rb

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require 'rails_helper'
describe ApplicationHelper do
describe 'active_nav_class' do
it 'returns active when on the current page' do
allow(helper).to receive(:current_page?).and_return(true)
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result = helper.active_nav_class("/test")
expect(result).to eq "active"
end
it 'returns empty string when not on current page' do
allow(helper).to receive(:current_page?).and_return(false)
result = helper.active_nav_class("/test")
expect(result).to eq ""
end
end
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end