Async TestInitialize guarantees test to fail

.net, asynchronous, c#, tdd, unit-testing

Solution

Probably the cleanest way to do this is to have `TestInitialize` start the asynchronous operation, as such:

[TestClass]
public class UnitTestAsync
{
    private Task<int> val = null;

    [TestInitialize]
    public void TestInitializeMethod()
    {
        val = TestInitializeMethodAsync();
    }

    private async Task<int> TestInitializeMethodAsync()
    {
        return await LongRunningMethod();
    }

    private async Task<int> LongRunningMethod()
    {
        await Task.Delay(20);
        return 10;
    }

    [TestMethod]
    public async Task TestMehod2()
    {
        Assert.AreEqual(10, await val);
    }
}

Problem

It is incorrect by design to have async call within TestInitialize, as TestInitialize has to happen before any TestMethod and have fixed signature. Can this be correct approach in any way to have async TestInitialize as well? ``` private int val = 0; [TestInitialize] public async Task TestMehod1() { var result = await LongRunningMethod(); val = 10; } [TestMethod] public void TestMehod2() { Assert.AreEqual(10, val); } ``` Any thoughts?

Original source