Delayed NUnit Assert message evaluation

Question

I have this assert in my test code

Assert.That(() => eventData.Count == 0,
Is.True.After(notificationPollingDelay),
\"Received unexpected event with last even         


        

Answer 1

The simplest answer is "don't include that text in your failure message". I personally almost never include a failure message; if your test is atomic enough you don't need to do it. Usually if I need to figure out a cryptic failure, only a debugger helps anyway.

If you really want to do it, this code should work without managing the threads yourself.

try
{
    Assert.That(() => eventData.Count == 0, Is.True.After(notificationPollingDelay));
}
catch(AssertionException)
{
    throw new Exception("Received unexpected event with last event data" + eventData.Last().Description());
}