fix grpc/tests: use ::testing::NiceMock

It is ok not to mock all methods
commit_hash:cf9131a7d2c3076cbc3f752218865f72d77602a6

Author: fdr400

grpc/tests/server_middleware_hooks_streaming_test.cpp

@@ -28,7 +28,7 @@ const grpc::Status kUnknownErrorStatus{
     grpc::StatusCode::UNKNOWN,
     "The service method has exited unexpectedly, without providing a status"};
 
-class UnitTestServiceMock final : public sample::ugrpc::UnitTestServiceBase {
+class UnitTestServiceMock : public sample::ugrpc::UnitTestServiceBase {
 public:
     MOCK_METHOD(ChatResult, Chat, (ugrpc::server::CallContext& /*context*/, ChatReaderWriter& /*stream*/), (override));
 };
@@ -41,7 +41,7 @@ struct Flags final {
 
 class ServerMiddlewareHooksStreamingTest : public tests::MiddlewaresFixture<
                                                tests::server::ServerMiddlewareBaseMock,
-                                               UnitTestServiceMock,
+                                               ::testing::NiceMock<UnitTestServiceMock>,
                                                sample::ugrpc::UnitTestServiceClient,
                                                /*N=*/3> {
 protected:

grpc/tests/server_middleware_hooks_unary_test.cpp

@@ -30,7 +30,7 @@ const grpc::Status kUnknownErrorStatus{
 
 const grpc::Status kUnimplementedStatus{grpc::StatusCode::UNIMPLEMENTED, "This method is unimplemented"};
 
-class MessengerMock final : public sample::ugrpc::UnitTestServiceBase {
+class UnitTestServiceMock : public sample::ugrpc::UnitTestServiceBase {
 public:
     MOCK_METHOD(
         SayHelloResult,
@@ -47,7 +47,7 @@ struct Flags final {
 // NOLINTNEXTLINE(fuchsia-multiple-inheritance)
 class ServerMiddlewareHooksUnaryTest : public tests::MiddlewaresFixture<
                                            tests::server::ServerMiddlewareBaseMock,
-                                           MessengerMock,
+                                           ::testing::NiceMock<UnitTestServiceMock>,
                                            sample::ugrpc::UnitTestServiceClient,
                                            /*N=*/3>,
                                        public testing::WithParamInterface<Flags> {