Add unit test.

Signed-off-by: Random-Liu <lantaol@google.com>

pkg/registrar/registrar_test.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package registrar
+
+import (
+	"testing"
+
+	assertlib "github.com/stretchr/testify/assert"
+)
+
+func TestRegistrar(t *testing.T) {
+	r := NewRegistrar()
+	assert := assertlib.New(t)
+
+	t.Logf("should be able to reserve a name<->key mapping")
+	assert.NoError(r.Reserve("test-name-1", "test-id-1"))
+
+	t.Logf("should be able to reserve a new name<->key mapping")
+	assert.NoError(r.Reserve("test-name-2", "test-id-2"))
+
+	t.Logf("should be able to reserve the same name<->key mapping")
+	assert.NoError(r.Reserve("test-name-1", "test-id-1"))
+
+	t.Logf("should not be able to reserve conflict name<->key mapping")
+	assert.Error(r.Reserve("test-name-1", "test-id-conflict"))
+	assert.Error(r.Reserve("test-name-conflict", "test-id-2"))
+
+	t.Logf("should be able to release name<->key mapping by key")
+	r.ReleaseByKey("test-id-1")
+
+	t.Logf("should be able to release name<->key mapping by name")
+	r.ReleaseByName("test-name-2")
+
+	t.Logf("should be able to reserve new name<->key mapping after release")
+	assert.NoError(r.Reserve("test-name-1", "test-id-new"))
+	assert.NoError(r.Reserve("test-name-new", "test-id-2"))
+
+	t.Logf("should be able to reserve same name/key name<->key")
+	assert.NoError(r.Reserve("same-name-id", "same-name-id"))
+}