xUnit1048 v2 v3 Warning

Avoid using 'async void' for test methods as it is deprecated in xUnit.net v3

Cause

A violation of this rule occurs when an async test method returns void.

Reason for rule

Support for async void test methods is being removed in xUnit.net v3. To ease upgrading from v2 to v3, convert the test method to return Task instead of void. This rule will only trigger for v2 projects.

How to fix violations

To fix a violation of this rule, change the test method return type to Task.

Examples

Violates

using Xunit;

public class TestClass
{
    [Fact]
    public async void TestMethod()
    {
        // ...
    }
}

Does not violate

using System.Threading.Tasks;
using Xunit;

public class TestClass
{
    [Fact]
    public async Task TestMethod()
    {
        // ...
    }
}