Simple Example of C# Async Unit Test in VS11

AsyncTestExample.cs

public class SystemUnderTest
{
	public Task<string> LongRunningOperation()
	{
		return Task.Run(() =>
				{
				Thread.Sleep(2000); // Simulate the long operation
				return "Hello there";
				});
	}
}

// Using MS-Test
[TestClass]
public class MsTestAsyncExample
{
	[TestMethod]
	public async Task TestLongRunningOperation()
	{
		var sut = new SystemUnderTest();
		var result = await sut.LongRunningOperation();
		Assert.AreEqual("Hello there", result);
	}
}

// Using xUnit.net
public class xUnitExample
{
	[Fact]
	public async Task TestLongRunningOperation()
	{
		var sut = new SystemUnderTest();
		var result = await sut.LongRunningOperation();
		Assert.Equal("Hello there", result);
	}
}