public async Task ExecuteRequestMessagesAsync_DisposesResponseInCaseOfException()
        {
            List <DisposableResponseMessage> responses = new List <DisposableResponseMessage>();
            MockHttpServer server = new MockHttpServer(
                request =>
            {
                if (request.Method == HttpMethod.Put)
                {
                    throw new InvalidOperationException();
                }
                var response = new DisposableResponseMessage();
                responses.Add(response);
                return(response);
            }
                );
            DefaultHttpBatchHandler batchHandler = new DefaultHttpBatchHandler(server);

            HttpRequestMessage[] requests = new HttpRequestMessage[]
            {
                new HttpRequestMessage(HttpMethod.Get, "http://example.com/"),
                new HttpRequestMessage(HttpMethod.Post, "http://example.com/"),
                new HttpRequestMessage(HttpMethod.Put, "http://example.com/")
            };

            await Assert.ThrowsAsync <InvalidOperationException>(
                () => batchHandler.ExecuteRequestMessagesAsync(requests, CancellationToken.None)
                );

            Assert.Equal(2, responses.Count);
            foreach (var response in responses)
            {
                Assert.True(response.IsDisposed);
            }
        }
        public void ExecuteRequestMessagesAsync_DisposesResponseInCaseOfException()
        {
            List<DisposableResponseMessage> responses = new List<DisposableResponseMessage>();
            MockHttpServer server = new MockHttpServer(request =>
            {
                if (request.Method == HttpMethod.Put)
                {
                    throw new InvalidOperationException();
                }
                var response = new DisposableResponseMessage();
                responses.Add(response);
                return response;
            });
            DefaultHttpBatchHandler batchHandler = new DefaultHttpBatchHandler(server);
            HttpRequestMessage[] requests = new HttpRequestMessage[]
            {
                new HttpRequestMessage(HttpMethod.Get, "http://example.com/"),
                new HttpRequestMessage(HttpMethod.Post, "http://example.com/"),
                new HttpRequestMessage(HttpMethod.Put, "http://example.com/")
            };

            Assert.Throws<InvalidOperationException>(
                () => batchHandler.ExecuteRequestMessagesAsync(requests, CancellationToken.None).Result);

            Assert.Equal(2, responses.Count);
            foreach (var response in responses)
            {
                Assert.True(response.IsDisposed);
            }
        }