xUnit Assert.All() async

Question

I have this example test using xUnit:

    [Fact]
    public void SomeTest()
    {
        Assert.All(itemList, async item=>
                {
                    var i = await Something(item);
                    Assert.Equal(item,i);
                });
    }

Is there a good solution to make the whole test async/awaitable?

Change your test method signature to `public async Task SomeTest()` — Igor, Jul 26 '16 at 17:35
@Igor: That change only makes `SomeTest()` superficially awaitable. `Assert.All()` still behaves the same way. — recursive, Jul 26 '16 at 17:43

Eli Arbel · Answer 1 · 2023-07-18T14:55:56.763

32

In xUnit 2.4.2 and above, use Assert.AllAsync. Otherwise, you can use Task.WhenAll:

[Fact]
public async Task SomeTest()
{
    var itemList = ...;
    var results = await Task.WhenAll(itemList.Select(async item =>
    {
        var i = await Something(item);
        return i;
    }));
    Assert.All(results, result => Assert.Equal(1, result));
}

edited Jul 18 '23 at 14:55

answered Jul 26 '16 at 18:31

Eli Arbel

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score 3 · Accepted Answer · answered Jan 16 '23 at 14:29

3

As for 2023, accepted answer is no longer true, xunit team added Assert.AllAsync: https://github.com/xunit/xunit/discussions/2498

answered Jan 16 '23 at 14:29

Mr Patience

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1

Applies to XUnit 2.4.2+ – J2ghz Jan 18 '23 at 11:14

xUnit Assert.All() async

2 Answers2