Update unit tests to new gRPC

gomock cannot compare protobuf messages due to mismatches in private
fields. Use a custom matcher for protobuf messages.

pkg/controller/controller_test.go

@@ -170,7 +170,7 @@ func TestGetPluginName(t *testing.T) {
 	in := &csi.GetPluginInfoRequest{}
 	out := test.output[0]
 
-	identityServer.EXPECT().GetPluginInfo(gomock.Any(), in).Return(out, nil).Times(1)
+	identityServer.EXPECT().GetPluginInfo(gomock.Any(), ProtobufMatcher{in}).Return(out, nil).Times(1)
 	oldName, err := GetDriverName(csiConn.conn, timeout)
 	if err != nil {
 		t.Errorf("test %q: Failed to get driver's name", test.name)
@@ -180,7 +180,7 @@ func TestGetPluginName(t *testing.T) {
 	}
 
 	out = test.output[1]
-	identityServer.EXPECT().GetPluginInfo(gomock.Any(), in).Return(out, nil).Times(1)
+	identityServer.EXPECT().GetPluginInfo(gomock.Any(), ProtobufMatcher{in}).Return(out, nil).Times(1)
 	newName, err := GetDriverName(csiConn.conn, timeout)
 	if err != nil {
 		t.Errorf("test %s: Failed to get driver's name", test.name)
@@ -351,7 +351,7 @@ func TestGetDriverName(t *testing.T) {
 		}
 
 		// Setup expectation
-		identityServer.EXPECT().GetPluginInfo(gomock.Any(), in).Return(out, injectedErr).Times(1)
+		identityServer.EXPECT().GetPluginInfo(gomock.Any(), ProtobufMatcher{in}).Return(out, injectedErr).Times(1)
 
 		name, err := GetDriverName(csiConn.conn, timeout)
 		if test.expectError && err == nil {
@@ -450,9 +450,9 @@ func TestCreateDriverReturnsInvalidCapacityDuringProvision(t *testing.T) {
 	// Set up Mocks
 	controllerServer.EXPECT().CreateVolume(gomock.Any(), gomock.Any()).Return(out, nil).Times(1)
 	// Since capacity returned by driver is invalid, we expect the provision call to clean up the volume
-	controllerServer.EXPECT().DeleteVolume(gomock.Any(), &csi.DeleteVolumeRequest{
+	controllerServer.EXPECT().DeleteVolume(gomock.Any(), ProtobufMatcher{&csi.DeleteVolumeRequest{
 		VolumeId: "test-volume-id",
-	}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
+	}}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
 
 	// Call provision
 	_, _, err = csiProvisioner.Provision(context.Background(), opts)
@@ -4558,9 +4558,9 @@ func TestProvisionFromSnapshot(t *testing.T) {
 			if tc.notPopulated {
 				out.Volume.ContentSource = nil
 				controllerServer.EXPECT().CreateVolume(gomock.Any(), gomock.Any()).Return(out, nil).Times(1)
-				controllerServer.EXPECT().DeleteVolume(gomock.Any(), &csi.DeleteVolumeRequest{
+				controllerServer.EXPECT().DeleteVolume(gomock.Any(), ProtobufMatcher{&csi.DeleteVolumeRequest{
 					VolumeId: "test-volume-id",
-				}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
+				}}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
 			} else {
 				snapshotSource := csi.VolumeContentSource_Snapshot{
 					Snapshot: &csi.VolumeContentSource_SnapshotSource{
@@ -6659,9 +6659,9 @@ func TestProvisionFromPVC(t *testing.T) {
 				controllerServer.EXPECT().CreateVolume(gomock.Any(), gomock.Any()).Return(out, nil).Times(1)
 				// if the volume created is less than the requested size,
 				// deletevolume will be called
-				controllerServer.EXPECT().DeleteVolume(gomock.Any(), &csi.DeleteVolumeRequest{
+				controllerServer.EXPECT().DeleteVolume(gomock.Any(), ProtobufMatcher{&csi.DeleteVolumeRequest{
 					VolumeId: "test-volume-id",
-				}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
+				}}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
 			}
 
 			_, _, _, claimLister, _, _ := listers(clientSet)
@@ -6838,14 +6838,14 @@ func TestProvisionWithMigration(t *testing.T) {
 					expectParams[translatedKey] = "foo"
 				}
 				controllerServer.EXPECT().CreateVolume(gomock.Any(),
-					&csi.CreateVolumeRequest{
+					ProtobufMatcher{&csi.CreateVolumeRequest{
 						Name:               "test-testi",
 						Parameters:         expectParams,
 						VolumeCapabilities: nil,
 						CapacityRange: &csi.CapacityRange{
 							RequiredBytes: int64(requestBytes),
 						},
-					}).Return(
+					}}).Return(
 					&csi.CreateVolumeResponse{
 						Volume: &csi.Volume{
 							CapacityBytes: requestBytes,
@@ -6997,9 +6997,9 @@ func TestDeleteMigration(t *testing.T) {
 			// We assert that the Delete is called on the driver with either the
 			// normal or the translated handle
 			controllerServer.EXPECT().DeleteVolume(gomock.Any(),
-				&csi.DeleteVolumeRequest{
+				ProtobufMatcher{&csi.DeleteVolumeRequest{
 					VolumeId: volID,
-				}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
+				}}).Return(&csi.DeleteVolumeResponse{}, nil).Times(1)
 
 			// Run Delete
 			err = csiProvisioner.Delete(context.Background(), tc.pv)
@@ -7046,3 +7046,26 @@ func createFakeCSIPV(volumeHandle string) *v1.PersistentVolume {
 		},
 	}
 }
+
+type ProtobufMatcher struct {
+	// Protobuf messages implement String() function that renders the message as "protobuf style string".
+	// `name:"test-testi"  capacity_range:{required_bytes:100000}  parameters:{key:"fstype"  value:"ext3"}  parameters:{key:"translated"  value:"foo"}`
+	msg fmt.Stringer
+}
+
+func (p ProtobufMatcher) Matches(x interface{}) bool {
+	otherMsg, ok := x.(fmt.Stringer)
+	if !ok {
+		return false
+	}
+	// Using explicit variables to put a breakpoint here and see them easily in a debugger
+	myText := p.msg.String()
+	otherText := otherMsg.String()
+	return myText == otherText
+}
+
+func (p ProtobufMatcher) String() string {
+	// This is used in error prints when two messages don't match.
+	// Return the same text Matches() used for comparison.
+	return p.msg.String()
+}