Add simulated response latency .After(TimeSpan) (closes #117) - #134
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Add simulated response latency .After(TimeSpan) (closes #117)#134dennisdoomen wants to merge 2 commits into
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Introduce an internal async responder path on RequestMock and converge the synchronous Responder onto a single async execution path (TrackRequestAsync). Thread the CancellationToken from MockHttpMessageHandler.SendAsync through HttpMock.HandleRequest into RequestMock. Add public RespondsWith overloads accepting Func<RequestInfo, Task<HttpResponseMessage>> and Func<RequestInfo, CancellationToken, Task<HttpResponseMessage>>. The existing synchronous Responder property and TrackRequest method are preserved. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Add an After(TimeSpan) method on RequestMockResponseBuilder that stores a delay on the RequestMock and awaits Task.Delay before invoking the responder on the async response path, honoring the CancellationToken flowing from SendAsync. A cancelled token (e.g. via HttpClient.Timeout or an external token) throws TaskCanceledException/OperationCanceledException as a real HttpClient would. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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| [Fact] | ||
| public async Task A_negative_delay_is_rejected() |
| using var cts = new CancellationTokenSource(TimeSpan.FromMilliseconds(100)); | ||
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| // Act | ||
| Func<Task> act = () => client.GetAsync("https://localhost/slow", cts.Token); |
| /// </remarks> | ||
| /// <param name="delay">The amount of time to wait before producing the response.</param> | ||
| /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="delay"/> is negative.</exception> | ||
| public RequestMockResponseBuilder After(TimeSpan delay) |
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Closes #117
Summary
Adds a way to simulate a slow endpoint so tests can exercise timeout, cancellation, and resilience (e.g. Polly) behavior.
After(TimeSpan delay)stores the delay on theRequestMockand the async response path awaitsTask.Delay(delay, cancellationToken)before invoking the responder, reusing theCancellationTokenalready threaded fromMockHttpMessageHandler.SendAsyncthroughHttpMock.HandleRequestintoRequestMock.TrackRequestAsyncby the stacked async-responder work.A cancelled token throws
TaskCanceledException/OperationCanceledException, exactly as a realHttpClientwould (e.g. whenHttpClient.Timeoutis shorter than the delay, or when the caller's token is cancelled).New public API
RequestMockResponseBuilder RequestMockResponseBuilder.After(TimeSpan delay)The change is purely additive and backward-compatible. A negative delay throws
ArgumentOutOfRangeException.Tests
New
WhenSimulatingResponseLatencyspecs (xUnit + FluentAssertions, AAA):HttpClient.Timeoutshorter than the delay throwsTaskCanceledExceptionVerified green on both
net472andnet8.0. Updated the public-API approval files (net472.verified.txt,net8.0.verified.txt) viaAcceptApiChanges.ps1, and added docs towebsite/docs/advanced.md,intro.md,README.md, andSKILL.md.