Add simulated response latency .After(TimeSpan) - #134
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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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August 10, 2026 11:19
- Avoid capturing a disposed CancellationTokenSource in a closure by capturing the token value instead - Remove unused async modifier on a synchronous test - Suppress false-positive unused-return-value warning on the fluent After() builder method Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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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.