xUnit2014 - Xunit — ContextQMD

Cause

This rule is triggered when calling Assert.Throws with an async lambda.

Reason for rule

Assert.Throws only supports non-async code.

How to fix violations

To fix a violation of this rule, use Assert.ThrowsAsync (along with await).

Examples

Violates

csharp

using System;
using System.Threading.Tasks;
using Xunit;

public class xUnit2014
{
    class MyMath
    {
        public static Task<int> Divide(params int[] values) => 42;
    }

    [Fact]
    public void TestMethod()
    {
        Assert.Throws<DivideByZeroException>(() => MyMath.Divide(1, 0));
    }
}

Does not violate

csharp

using System;
using System.Threading.Tasks;
using Xunit;

public class xUnit2014
{
    class MyMath
    {
        public static Task<int> Divide(params int[] values) => 42;
    }

    [Fact]
    public async void TestMethod()
    {
        await Assert.ThrowsAsync<DivideByZeroException>(() => MyMath.Divide(1, 0));
    }
}