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

You may use this scheme:

var constrain = Is.True.After(notificationPollingDelay);
var condition = constrain.Matches(() => eventData.Count == 0);
Assert.IsTrue(condition, 
              "Received unexpected event with last event data" + 
              eventData.Last().Description());

This method is similar to the use Thread.Sleep