public async Task GreeterService_SayHelloUnary_ReturnsCorrectResponse()
        {
            // Arrange
            var service = new GreeterService(new Logger <GreeterService>(new NullLoggerFactory()));

            // Act
            var response = await service.SayHelloUnary(new HelloRequest { Name = "Joe" }, TestServerCallContext.Create());

            // Assert
            Assert.AreEqual("Hello Joe", response.Message);
        }
        public async Task Service_greets_sender_unary(GreeterService sut, string name, ServerCallContext context)
        {
            var response = await sut.SayHelloUnary(new HelloRequest { Name = name }, context);

            Assert.That(response.Message, Does.EndWith(name));
        }