Add some more azure unit tests.

pkg/cloudprovider/providers/azure/BUILD

@@ -69,6 +69,7 @@ go_test(
         "azure_loadbalancer_test.go",
         "azure_metrics_test.go",
         "azure_standard_test.go",
+        "azure_storageaccount_test.go",
         "azure_test.go",
         "azure_vmss_test.go",
         "azure_wrap_test.go",
@@ -81,6 +82,7 @@ go_test(
         "//pkg/kubelet/apis:go_default_library",
         "//vendor/github.com/Azure/azure-sdk-for-go/arm/compute:go_default_library",
         "//vendor/github.com/Azure/azure-sdk-for-go/arm/network:go_default_library",
+        "//vendor/github.com/Azure/azure-sdk-for-go/arm/storage:go_default_library",
         "//vendor/github.com/Azure/go-autorest/autorest:go_default_library",
         "//vendor/github.com/Azure/go-autorest/autorest/to:go_default_library",
         "//vendor/github.com/stretchr/testify/assert:go_default_library",

pkg/cloudprovider/providers/azure/azure_fakes.go

@@ -930,6 +930,8 @@ func (fRTC *fakeRouteTablesClient) Get(resourceGroupName string, routeTableName
 type fakeStorageAccountClient struct {
 	mutex     *sync.Mutex
 	FakeStore map[string]map[string]storage.Account
+	Keys      storage.AccountListKeysResult
+	Err       error
 }
 
 func newFakeStorageAccountClient() *fakeStorageAccountClient {
@@ -999,7 +1001,7 @@ func (fSAC *fakeStorageAccountClient) Delete(resourceGroupName string, accountNa
 }
 
 func (fSAC *fakeStorageAccountClient) ListKeys(resourceGroupName string, accountName string) (result storage.AccountListKeysResult, err error) {
-	return storage.AccountListKeysResult{}, nil
+	return fSAC.Keys, fSAC.Err
 }
 
 func (fSAC *fakeStorageAccountClient) ListByResourceGroup(resourceGroupName string) (result storage.AccountListResult, err error) {

pkg/cloudprovider/providers/azure/azure_storageaccount_test.go

@@ -0,0 +1,80 @@
+/*
+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 azure
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/Azure/azure-sdk-for-go/arm/storage"
+)
+
+func TestGetStorageAccessKeys(t *testing.T) {
+	cloud := &Cloud{}
+	fake := newFakeStorageAccountClient()
+	cloud.StorageAccountClient = fake
+	value := "foo bar"
+
+	tests := []struct {
+		results     storage.AccountListKeysResult
+		expectedKey string
+		expectErr   bool
+		err         error
+	}{
+		{storage.AccountListKeysResult{}, "", true, nil},
+		{
+			storage.AccountListKeysResult{
+				Keys: &[]storage.AccountKey{
+					{Value: &value},
+				},
+			},
+			"bar",
+			false,
+			nil,
+		},
+		{
+			storage.AccountListKeysResult{
+				Keys: &[]storage.AccountKey{
+					{},
+					{Value: &value},
+				},
+			},
+			"bar",
+			false,
+			nil,
+		},
+		{storage.AccountListKeysResult{}, "", true, fmt.Errorf("test error")},
+	}
+
+	for _, test := range tests {
+		expectedKey := test.expectedKey
+		fake.Keys = test.results
+		fake.Err = test.err
+		key, err := cloud.getStorageAccesskey("acct")
+		if test.expectErr && err == nil {
+			t.Errorf("Unexpected non-error")
+			continue
+		}
+		if !test.expectErr && err != nil {
+			t.Errorf("Unexpected error: %v", err)
+			continue
+		}
+		if key != expectedKey {
+			t.Errorf("expected: %s, saw %s", expectedKey, key)
+		}
+	}
+}