public void ActionProgress()
{
var a1 = AsyncAction <int> .CreateCompleted();
var a2 = AsyncAction <int> .CreateCompleted();
Assert.AreEqual(AsyncStatus.Completed, a1.Status);
Assert.AreSame(a2, a1);
a1 = AsyncAction <int> .CreateCanceled();
a2 = AsyncAction <int> .CreateCanceled();
Assert.ThrowsException <OperationCanceledException>(() => a1.GetResults());
Assert.AreEqual(AsyncStatus.Canceled, a1.Status);
Assert.AreSame(a2, a1);
a1 = AsyncAction <int> .CreateFault();
a2 = AsyncAction <int> .CreateFault();
Assert.AreEqual(AsyncStatus.Error, a1.Status);
Assert.ThrowsException <Exception>(() => a1.GetResults());
Assert.IsNotNull(a1.ErrorCode);
Assert.AreSame(a2, a1);
a1 = AsyncAction <int> .CreateFault(new InvalidOperationException("text"));
Assert.AreEqual(AsyncStatus.Error, a1.Status);
Assert.ThrowsException <InvalidOperationException>(() => a1.GetResults());
Assert.IsNotNull(a1.ErrorCode);
Assert.AreEqual("text", a1.ErrorCode.Message);
a1.Close();
Assert.IsNotNull(a1.ErrorCode);
Assert.AreEqual("text", a1.ErrorCode.Message);
}