dennisdoomen/fluentassertions — pull request #144 by BrunoJuchli (2014-07-30 13:23:10+00:00)
Title: `Invoke(...)` extension method for async await (named `Awaiting(..)`)

Re-Post of #143 on develop branch. I hope i've got it right this time!

usage:

foo
.Awaiting(async x => await x.DoSomething())
.ShouldThrow();