Add more unit tests

pkg/cloudprovider/providers/azure/BUILD

@@ -12,6 +12,7 @@ go_library(
         "azure.go",
         "azure_backoff.go",
         "azure_blobDiskController.go",
+        "azure_cache.go",
         "azure_client.go",
         "azure_controllerCommon.go",
         "azure_fakes.go",
@@ -21,12 +22,11 @@ go_library(
         "azure_managedDiskController.go",
         "azure_metrics.go",
         "azure_routes.go",
+        "azure_standard.go",
         "azure_storage.go",
         "azure_storageaccount.go",
-        "azure_util.go",
-        "azure_util_cache.go",
-        "azure_util_vmss.go",
         "azure_vmsets.go",
+        "azure_vmss.go",
         "azure_wrap.go",
         "azure_zones.go",
     ],
@@ -64,11 +64,11 @@ go_library(
 go_test(
     name = "go_default_test",
     srcs = [
+        "azure_cache_test.go",
         "azure_loadbalancer_test.go",
         "azure_metrics_test.go",
         "azure_test.go",
-        "azure_util_cache_test.go",
-        "azure_util_test.go",
+        "azure_vmss_test.go",
         "azure_wrap_test.go",
     ],
     embed = [":go_default_library"],

pkg/cloudprovider/providers/azure/azure_standard_test.go

@@ -1,53 +0,0 @@
-/*
-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/stretchr/testify/assert"
-)
-
-func TestGetScaleSetVMInstanceID(t *testing.T) {
-	tests := []struct {
-		msg                string
-		machineName        string
-		expectError        bool
-		expectedInstanceID string
-	}{{
-		msg:         "invalid vmss instance name",
-		machineName: "vmvm",
-		expectError: true,
-	},
-		{
-			msg:                "valid vmss instance name",
-			machineName:        "vm00000Z",
-			expectError:        false,
-			expectedInstanceID: "35",
-		},
-	}
-
-	for i, test := range tests {
-		instanceID, err := getScaleSetVMInstanceID(test.machineName)
-		if test.expectError {
-			assert.Error(t, err, fmt.Sprintf("TestCase[%d]: %s", i, test.msg))
-		} else {
-			assert.Equal(t, test.expectedInstanceID, instanceID, fmt.Sprintf("TestCase[%d]: %s", i, test.msg))
-		}
-	}
-}

pkg/cloudprovider/providers/azure/azure_vmss.go

@@ -190,10 +190,12 @@ func (ss *scaleSet) getCachedVirtualMachine(nodeName string) (scaleSetVMInfo, er
 	}
 
 	// Update cache and try again.
+	glog.V(10).Infof("vmss cache before updateCache: %v", ss.cache)
 	if err := ss.updateCache(); err != nil {
 		glog.Errorf("updateCache failed with error: %v", err)
 		return scaleSetVMInfo{}, err
 	}
+	glog.V(10).Infof("vmss cache after updateCache: %v", ss.cache)
 	vm, found = getVMFromCache(nodeName)
 	if found {
 		return vm, nil

pkg/cloudprovider/providers/azure/azure_vmss_test.go

@@ -0,0 +1,149 @@
+/*
+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 azure
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/Azure/azure-sdk-for-go/arm/compute"
+	"github.com/stretchr/testify/assert"
+)
+
+func newTestScaleSet() *scaleSet {
+	ss := newScaleSet(getTestCloud())
+	return ss.(*scaleSet)
+}
+
+func setTestVirtualMachineScaleSets(ss *scaleSet, scaleSetName string, vmList []string) {
+	virtualMachineScaleSetsClient := newFakeVirtualMachineScaleSetsClient()
+	scaleSets := make(map[string]map[string]compute.VirtualMachineScaleSet)
+	scaleSets["rg"] = map[string]compute.VirtualMachineScaleSet{
+		scaleSetName: {
+			Name: &scaleSetName,
+		},
+	}
+	virtualMachineScaleSetsClient.setFakeStore(scaleSets)
+
+	virtualMachineScaleSetVMsClient := newFakeVirtualMachineScaleSetVMsClient()
+	ssVMs := make(map[string]map[string]compute.VirtualMachineScaleSetVM)
+	ssVMs["rg"] = make(map[string]compute.VirtualMachineScaleSetVM)
+	for i := range vmList {
+		ID := fmt.Sprintf("azure:///subscriptions/script/resourceGroups/rg/providers/Microsoft.Compute/virtualMachineScaleSets/%s/virtualMachines/%d", scaleSetName, i)
+		nodeName := vmList[i]
+		instanceID := fmt.Sprintf("%d", i)
+		vmKey := fmt.Sprintf("%s-%s", scaleSetName, nodeName)
+		networkInterfaces := []compute.NetworkInterfaceReference{
+			{
+				ID: &nodeName,
+			},
+		}
+		ssVMs["rg"][vmKey] = compute.VirtualMachineScaleSetVM{
+			VirtualMachineScaleSetVMProperties: &compute.VirtualMachineScaleSetVMProperties{
+				OsProfile: &compute.OSProfile{
+					ComputerName: &nodeName,
+				},
+				NetworkProfile: &compute.NetworkProfile{
+					NetworkInterfaces: &networkInterfaces,
+				},
+			},
+			ID:         &ID,
+			InstanceID: &instanceID,
+			Location:   &ss.Cloud.Location,
+		}
+	}
+	virtualMachineScaleSetVMsClient.setFakeStore(ssVMs)
+
+	ss.Cloud.VirtualMachineScaleSetsClient = virtualMachineScaleSetsClient
+	ss.Cloud.VirtualMachineScaleSetVMsClient = virtualMachineScaleSetVMsClient
+}
+
+func TestGetScaleSetVMInstanceID(t *testing.T) {
+	tests := []struct {
+		msg                string
+		machineName        string
+		expectError        bool
+		expectedInstanceID string
+	}{{
+		msg:         "invalid vmss instance name",
+		machineName: "vmvm",
+		expectError: true,
+	},
+		{
+			msg:                "valid vmss instance name",
+			machineName:        "vm00000Z",
+			expectError:        false,
+			expectedInstanceID: "35",
+		},
+	}
+
+	for i, test := range tests {
+		instanceID, err := getScaleSetVMInstanceID(test.machineName)
+		if test.expectError {
+			assert.Error(t, err, fmt.Sprintf("TestCase[%d]: %s", i, test.msg))
+		} else {
+			assert.Equal(t, test.expectedInstanceID, instanceID, fmt.Sprintf("TestCase[%d]: %s", i, test.msg))
+		}
+	}
+}
+
+func TestGetInstanceIDByNodeName(t *testing.T) {
+	ss := newTestScaleSet()
+
+	testCases := []struct {
+		description string
+		scaleSet    string
+		vmList      []string
+		nodeName    string
+		expected    string
+		expectError bool
+	}{
+		{
+			description: "scaleSet should get instance by node name",
+			scaleSet:    "ss",
+			vmList:      []string{"vm1", "vm2"},
+			nodeName:    "vm1",
+			expected:    "azure:///subscriptions/script/resourceGroups/rg/providers/Microsoft.Compute/virtualMachineScaleSets/ss/virtualMachines/0",
+		},
+		{
+			description: "scaleSet should get instance by node name with upper cases hostname",
+			scaleSet:    "ss",
+			vmList:      []string{"VM1", "vm2"},
+			nodeName:    "vm1",
+			expected:    "azure:///subscriptions/script/resourceGroups/rg/providers/Microsoft.Compute/virtualMachineScaleSets/ss/virtualMachines/0",
+		},
+		{
+			description: "scaleSet should not get instance for non-exist nodes",
+			scaleSet:    "ss",
+			vmList:      []string{"VM1", "vm2"},
+			nodeName:    "vm3",
+			expectError: true,
+		},
+	}
+
+	for _, test := range testCases {
+		setTestVirtualMachineScaleSets(ss, test.scaleSet, test.vmList)
+		real, err := ss.GetInstanceIDByNodeName(test.nodeName)
+		if test.expectError {
+			assert.Error(t, err, test.description)
+			continue
+		}
+
+		assert.NoError(t, err, test.description)
+		assert.Equal(t, test.expected, real, test.description)
+	}
+}