Function TestChangeCacheConcurrent

engine/filesync/change_cache_test.go:19–66

(t *testing.T)

}

func TestChangeCacheConcurrent(t *testing.T) {
	t.Parallel()

	ctx := t.Context()
	c := newChangeCache()

	var initCount atomic.Int32
	initStarted := make(chan struct{})
	initDone := make(chan struct{})

	results := make([]*cachedChange, 0, 100)
	var resultsMu sync.Mutex

	var wg sync.WaitGroup
	for range 100 {
		wg.Add(1)
		go func() {
			defer wg.Done()
			res, err := c.getOrInit(ctx, "42", func(_ context.Context) (*ChangeWithStat, error) {
				if initCount.Add(1) == 1 {
					close(initStarted)
				}
				<-initDone
				return mkChange(ChangeKindModify), nil
			})
			assert.NilError(t, err)
			assert.Equal(t, ChangeKindModify, res.result().kind)

			resultsMu.Lock()
			results = append(results, res)
			resultsMu.Unlock()
		}()
	}

	select {
	case <-initStarted:
	case <-time.After(5 * time.Second):
		t.Fatal("timed out waiting for initializer")
	}
	close(initDone)

	wg.Wait()
	assert.Equal(t, int32(1), initCount.Load())

	for _, res := range results {
		res.release()
	}
}

func TestChangeCacheErrors(t *testing.T) {
	t.Parallel()