t.Fatalf("chmod %s %#o: %s", f.Name(), fm, err)
	}
	checkMode(t, f.Name(), fm)

	fm = FileMode(0123)
	if runtime.GOOS == "windows" {
		fm = FileMode(0666) // read-write file
	}
	if err := f.Chmod(fm); err != nil {
		t.Fatalf("chmod %s %#o: %s", f.Name(), fm, err)
	}
	checkMode(t, f.Name(), fm)
}

func checkSize(t *testing.T, f *File, size int64) {
	t.Helper()

	stopCh := make(chan struct{})
	obj := config.NewFunc()
	// Give this error when it is constructed rather than when you get the
	// first watch item, because it's much easier to track down that way.
	if err := runtime.CheckCodec(config.Codec, obj); err != nil {
		return nil, fmt.Errorf("storage codec doesn't seem to match given type: %v", err)
	}

	var indexedTrigger *indexedTriggerFunc
	if config.IndexerFuncs != nil {