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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package ipn
import (
"bytes"
"sync"
"testing"
"tailscale.com/util/mak"
)
type memStore struct {
mu sync.Mutex
writes int
m map[StateKey][]byte
}
func (s *memStore) ReadState(k StateKey) ([]byte, error) {
s.mu.Lock()
defer s.mu.Unlock()
return bytes.Clone(s.m[k]), nil
}
func (s *memStore) WriteState(k StateKey, v []byte) error {
s.mu.Lock()
defer s.mu.Unlock()
mak.Set(&s.m, k, bytes.Clone(v))
s.writes++
return nil
}
func TestWriteState(t *testing.T) {
var ss StateStore = new(memStore)
WriteState(ss, "foo", []byte("bar"))
WriteState(ss, "foo", []byte("bar"))
got, err := ss.ReadState("foo")
if err != nil {
t.Fatal(err)
}
if want := []byte("bar"); !bytes.Equal(got, want) {
t.Errorf("got %q; want %q", got, want)
}
if got, want := ss.(*memStore).writes, 1; got != want {
t.Errorf("got %d writes; want %d", got, want)
}
}
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