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a have this code:

var response = await await _service.GetProfile(code) .ContinueWith(async task =>{ if(task.IsFaulted) { ///... anyway return object; } });

I can't get to IsFault in my unit test. Can you help me build this unit test? I'm using Xunit and NSubstitute

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  • 2
    Don't use ContinueWith at all; use await instead. Commented Nov 17, 2022 at 21:08
  • Use await _service.GetProfile(code) for unit testing Commented Nov 18, 2022 at 6:51
  • It's not clear from the question whether the code you show is the test or the code you want to write a test for. Commented Nov 18, 2022 at 20:34

1 Answer 1

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Don't use ContinueWith. Just use await. A faulted Task will throw an exception on await that you can catch and handle.

try { var response = await _service.GetProfile(code); // Here Task is complete without an exception } catch(Exception ex) { // Task has faulted return object; }

Note that your test method has to be marked async.

In order to write unit tests for asynchronous code without using await, use synchronization objects like a ManualResetEvent.

See my answer here: "Thread was being aborted." in test that tests code that fires a delegate on a background thread

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