if err != nil {
		t.Fatal(err)
	}
	if exists {
		t.Fatalf("Expected version file %s not to exist after initializing non-empty data-dir", d.versionFile.path)
	}
}

func TestNonexistingDataDir(t *testing.T) {
	targetVersion := &EtcdVersionPair{&EtcdVersion{latestVersion}, storageEtcd3}
	path := newTestPath(t)
	defer os.RemoveAll(path)
	d, err := OpenOrCreateDataDirectory(filepath.Join(path, "data-dir"))