public async stt::Task CreateSpanRequestObjectAsync()
        {
            moq::Mock <TraceService.TraceServiceClient> mockGrpcClient = new moq::Mock <TraceService.TraceServiceClient>(moq::MockBehavior.Strict);
            Span request = new Span
            {
                SpanName                = SpanName.FromProjectTraceSpan("[PROJECT]", "[TRACE]", "[SPAN]"),
                SpanId                  = "span_id47c232d3",
                ParentSpanId            = "parent_span_ide637f6a2",
                DisplayName             = new TruncatableString(),
                StartTime               = new wkt::Timestamp(),
                EndTime                 = new wkt::Timestamp(),
                Attributes              = new Span.Types.Attributes(),
                StackTrace              = new StackTrace(),
                TimeEvents              = new Span.Types.TimeEvents(),
                Links                   = new Span.Types.Links(),
                Status                  = new gr::Status(),
                SameProcessAsParentSpan = false,
                ChildSpanCount          = -1491694397,
                SpanKind                = Span.Types.SpanKind.Consumer,
            };
            Span expectedResponse = new Span
            {
                SpanName                = SpanName.FromProjectTraceSpan("[PROJECT]", "[TRACE]", "[SPAN]"),
                SpanId                  = "span_id47c232d3",
                ParentSpanId            = "parent_span_ide637f6a2",
                DisplayName             = new TruncatableString(),
                StartTime               = new wkt::Timestamp(),
                EndTime                 = new wkt::Timestamp(),
                Attributes              = new Span.Types.Attributes(),
                StackTrace              = new StackTrace(),
                TimeEvents              = new Span.Types.TimeEvents(),
                Links                   = new Span.Types.Links(),
                Status                  = new gr::Status(),
                SameProcessAsParentSpan = false,
                ChildSpanCount          = -1491694397,
                SpanKind                = Span.Types.SpanKind.Consumer,
            };

            mockGrpcClient.Setup(x => x.CreateSpanAsync(request, moq::It.IsAny <grpccore::CallOptions>())).Returns(new grpccore::AsyncUnaryCall <Span>(stt::Task.FromResult(expectedResponse), null, null, null, null));
            TraceServiceClient client = new TraceServiceClientImpl(mockGrpcClient.Object, null);
            Span responseCallSettings = await client.CreateSpanAsync(request, gaxgrpc::CallSettings.FromCancellationToken(st::CancellationToken.None));

            xunit::Assert.Same(expectedResponse, responseCallSettings);
            Span responseCancellationToken = await client.CreateSpanAsync(request, st::CancellationToken.None);

            xunit::Assert.Same(expectedResponse, responseCancellationToken);
            mockGrpcClient.VerifyAll();
        }
        public async Task CreateSpanAsync()
        {
            Mock <TraceService.TraceServiceClient> mockGrpcClient = new Mock <TraceService.TraceServiceClient>(MockBehavior.Strict);
            apis::Span request = new apis::Span
            {
                SpanName    = new SpanName("[PROJECT]", "[TRACE]", "[SPAN]"),
                SpanId      = "spanId-2011840976",
                DisplayName = new TruncatableString(),
                StartTime   = new Timestamp(),
                EndTime     = new Timestamp(),
            };
            apis::Span expectedResponse = new apis::Span
            {
                SpanName     = new SpanName("[PROJECT]", "[TRACE]", "[SPAN]"),
                SpanId       = "spanId2-643891741",
                ParentSpanId = "parentSpanId-1757797477",
            };

            mockGrpcClient.Setup(x => x.CreateSpanAsync(request, It.IsAny <CallOptions>()))
            .Returns(new Grpc.Core.AsyncUnaryCall <apis::Span>(Task.FromResult(expectedResponse), null, null, null, null));
            TraceServiceClient client   = new TraceServiceClientImpl(mockGrpcClient.Object, null);
            apis::Span         response = await client.CreateSpanAsync(request);

            Assert.Same(expectedResponse, response);
            mockGrpcClient.VerifyAll();
        }