What happened to Assert.DoesNotThrowAsync() in xUnit?

Question

I migrated my unit test project from version 2.0.0-beta-{something} to 2.0.0 (stable) through NuGet. It seems like Assert.DoesNotThrowAsync() is not available anymore.

For Example:

[Fact] public void CanDeleteAllTempFiles() {     Assert.DoesNotThrowAsync(async () => DocumentService.DeleteAllTempDocuments()); } 

Results in

DocumentServiceTests.cs(11,11): Error CS0117: 'Xunit.Assert' does not contain a definition for 'DoesNotThrowAsync' (CS0117)

A workaround would be to omit the test. Is there any better solution?

Answer 1

I just wanted to update the answer with current information (Sep 2019).

As Malcon Heck mentioned, using the Record class is preferred. Looking at xUnit's Github, I see that a current way to check for lack of exceptions thrown is like this

[Fact] public async Task CanDeleteAllTempFiles() {     var exception = await Record.ExceptionAsync(() => DocumentService.DeleteAllTempDocuments());     Assert.Null(exception); } 

Answer 2

As you can see in this discussion, the recommended way to test if a method does not throw in xUnit v2 is to just call it.

In your example, that would be:

[Fact] public async Task CanDeleteAllTempFiles() {     await DocumentService.DeleteAllTempDocuments(); }