add another test

pkg/labels/labels_test.go

@@ -0,0 +1,43 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+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 labels
+
+import (
+	"testing"
+)
+
+func matches(t *testing.T, ls LabelSet, want string) {
+	if ls.String() != want {
+		t.Errorf("Expected '%s', but got '%s'", want, ls.String())
+	}
+}
+
+func TestLabelSetString(t *testing.T) {
+	matches(t, LabelSet{"x": "y"}, "x=y")
+	matches(t, LabelSet{"foo": "bar"}, "foo=bar")
+	matches(t, LabelSet{"foo": "bar", "baz": "qup"}, "foo=bar,baz=qup")
+
+	// TODO: Make our label representation robust enough to handel labels
+	// with ",=!" characters in their names.
+}
+
+func TestLabelGet(t *testing.T) {
+	ls := LabelSet{"x": "y"}
+	if ls.Get("x") != "y" {
+		t.Errorf("LabelSet.Get is broken")
+	}
+}