public void should_return_authors()
{
ICollection <Speaker> _speakers = new List <Speaker>();
Exception _ex = new Exception();
ManualResetEvent done = new ManualResetEvent(false);
IGatewayService sut = new GatewayService();
sut.GetAuthors((authors, ex) =>
{
_speakers = authors;
_ex = ex;
done.Set();
});
done.WaitOne();
Assert.IsNull(_ex);
Assert.IsTrue(_speakers.Count > 0);
}