Add tests for pkg/serviceaccount.

pkg/serviceaccount/BUILD

@@ -54,3 +54,14 @@ filegroup(
     srcs = [":package-srcs"],
     tags = ["automanaged"],
 )
+
+go_test(
+    name = "go_default_test",
+    srcs = ["util_test.go"],
+    embed = [":go_default_library"],
+    importpath = "k8s.io/kubernetes/pkg/serviceaccount",
+    deps = [
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+    ],
+)

pkg/serviceaccount/util_test.go

@@ -0,0 +1,103 @@
+/*
+Copyright 2018 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 serviceaccount
+
+import (
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func TestIsServiceAccountToken(t *testing.T) {
+
+	secretIns := &v1.Secret{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:            "token-secret-1",
+			Namespace:       "default",
+			UID:             "23456",
+			ResourceVersion: "1",
+			Annotations: map[string]string{
+				v1.ServiceAccountNameKey: "default",
+				v1.ServiceAccountUIDKey:  "12345",
+			},
+		},
+		Type: v1.SecretTypeServiceAccountToken,
+		Data: map[string][]byte{
+			"token":     []byte("ABC"),
+			"ca.crt":    []byte("CA Data"),
+			"namespace": []byte("default"),
+		},
+	}
+
+	saIns := &v1.ServiceAccount{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:            "default",
+			UID:             "12345",
+			Namespace:       "default",
+			ResourceVersion: "1",
+		},
+	}
+
+	saInsNameNotEqual := &v1.ServiceAccount{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:            "non-default",
+			UID:             "12345",
+			Namespace:       "default",
+			ResourceVersion: "1",
+		},
+	}
+
+	saInsUIDNotEqual := &v1.ServiceAccount{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:            "default",
+			UID:             "67890",
+			Namespace:       "default",
+			ResourceVersion: "1",
+		},
+	}
+
+	tests := map[string]struct {
+		secret *v1.Secret
+		sa     *v1.ServiceAccount
+		expect bool
+	}{
+		"correct service account": {
+			secret: secretIns,
+			sa:     saIns,
+			expect: true,
+		},
+		"service account name not equal": {
+			secret: secretIns,
+			sa:     saInsNameNotEqual,
+			expect: false,
+		},
+		"service account uid not equal": {
+			secret: secretIns,
+			sa:     saInsUIDNotEqual,
+			expect: false,
+		},
+	}
+
+	for k, v := range tests {
+		actual := IsServiceAccountToken(v.secret, v.sa)
+		if actual != v.expect {
+			t.Errorf("%s failed, expected %t but received %t", k, v.expect, actual)
+		}
+	}
+
+}