tailscale/ipn/store_test.go

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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ipn
import (
"io/ioutil"
"os"
"testing"
"tailscale.com/tstest"
)
func testStoreSemantics(t *testing.T, store StateStore) {
t.Helper()
tests := []struct {
// if true, data is data to write. If false, data is expected
// output of read.
write bool
id StateKey
data string
// If write=false, true if we expect a not-exist error.
notExists bool
}{
{
id: "foo",
notExists: true,
},
{
write: true,
id: "foo",
data: "bar",
},
{
id: "foo",
data: "bar",
},
{
id: "baz",
notExists: true,
},
{
write: true,
id: "baz",
data: "quux",
},
{
id: "foo",
data: "bar",
},
{
id: "baz",
data: "quux",
},
}
for _, test := range tests {
if test.write {
if err := store.WriteState(test.id, []byte(test.data)); err != nil {
t.Errorf("writing %q to %q: %v", test.data, test.id, err)
}
} else {
bs, err := store.ReadState(test.id)
if err != nil {
if test.notExists && err == ErrStateNotExist {
continue
}
t.Errorf("reading %q: %v", test.id, err)
continue
}
if string(bs) != test.data {
t.Errorf("reading %q: got %q, want %q", test.id, string(bs), test.data)
}
}
}
}
func TestMemoryStore(t *testing.T) {
tstest.PanicOnLog()
store := &MemoryStore{}
testStoreSemantics(t, store)
}
func TestFileStore(t *testing.T) {
tstest.PanicOnLog()
f, err := ioutil.TempFile("", "test_ipn_store")
if err != nil {
t.Fatal(err)
}
path := f.Name()
f.Close()
if err := os.Remove(path); err != nil {
t.Fatal(err)
}
store, err := NewFileStore(path)
if err != nil {
t.Fatalf("creating file store failed: %v", err)
}
testStoreSemantics(t, store)
// Build a brand new file store and check that both IDs written
// above are still there.
store, err = NewFileStore(path)
if err != nil {
t.Fatalf("creating second file store failed: %v", err)
}
expected := map[StateKey]string{
"foo": "bar",
"baz": "quux",
}
for id, want := range expected {
bs, err := store.ReadState(id)
if err != nil {
t.Errorf("reading %q (2nd store): %v", id, err)
}
if string(bs) != want {
t.Errorf("reading %q (2nd store): got %q, want %q", id, string(bs), want)
}
}
}