Skip to content

Faking async methods

The faking of async methods is fully supported in FakeItEasy.

public class Foo
{
    public virtual async Task<string> Bar()
    {
        // await something...
    }
}

A call to a non-configured async method on a fake will return a Dummy Task or Task<T>, just as if it were any other method that returns a Task or Task<T>1. For example:

var foo = A.Fake<Foo>();
var bar = await foo.Bar(); // will return immediately and return string.Empty

Of course, you can still configure calls to async methods as you would normally:

A.CallTo(() => foo.Bar()).Returns(Task.FromResult("bar"));
  1. In FakeItEasy 1.12 or earlier, the Task returned from a non-configured fake method would never be completed and the await would never be satisfied. If you are using 1.12 or earlier, upgrade now.