CODEWITHSUNDEEP
visual-studionunitresharpernunit-3.0
asaf92
asaf92

Reputation: 1855

NUnit async task fails "Method has non-void return value, but no result is expected"

I'm running unit tests in ReSharper with NUnit 3.10.

I'm getting this error when doing a simple async test:

Method has non-void return value, but no result is expected

My test is literally:

[Test]
public async Task Nothing()
{
    await Task.Delay(100);
}

It says in the documentation that this is in fact the correct way to run async tests.

Upvotes: 9

Views: 2718

Answers (3)

Dani Neuss
Dani Neuss

Reputation: 114

For any Unity user that comes across this: I had the issue that I was using TestCaseSource on a UnityTest, which caused the above error message. Instead it is recommended to use ValueSource: link.

Upvotes: 1

chantey
chantey

Reputation: 5827

For those working in Unity, make sure you are using the updated Test Framework Package, at least 2.0.1. It is currently in pre-release so you will need to enable show pre-release in the Package Manager.

Documentation here for more about the feature.

Upvotes: 7

asaf92
asaf92

Reputation: 1855

For me the issues was that instead of using a NuGet package, the references were to a DLL that's compiled targeting .NET Framework 3.5. Using a NuGet package of NUnit fixed it.

Upvotes: 0

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