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How do I unit test the event raised by class under test?


By : Tushar Kumar
Date : September 29 2020, 05:00 AM
Any of those help As far as I can tell, the Client class is irrelevant to this question? You just want to test the calling ProcessRequest.Process calls EventRaiserClass.RaiseEventForClient.
A simple way, without any mocks, using the EventRaiserClass:
code :
var eventRaiser = new EventRaiserClass();
bool eventRaised = false;
eventRaiser.SendEventToClient += (o, e) => eventRaised = true;

var processRequest = new ProcessRequest(eventRaiser);
processRequest.Process(someJObject);

Assert.True(eventRaised);
// Arrange
var eventRaiser = new EventRaiserClass();
int eventRaisedCount = 0;
eventRaiser.SendEventToClient += (o, e) => eventRaisedCount++;

var processRequest = new ProcessRequest(eventRaiser);

// Act
processRequest.Process(someJObject);

// Assert
Assert.Equal(1, eventRaisedCount);
// Arrange
var eventRaiser = Mock<IEventRaiser>();
var processRequest = new ProcessRequest(eventRaiser.Object);

// Act
processRequest.Process(someJObject);

// Assert
eventRaiser.Verify(x => x.RaiseEventForClient());
// Arrange
var eventRaiser = Substitute.For<IEventRaiser>();
var processRequest = new ProcessRequest(eventRaiser);

// Act
processRequest.Process(someJObject);

// Assert
eventRaiser.Received().RaiseEventForClient();


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MS Test unit testing raised event contents


By : Luis miguel meza men
Date : March 29 2020, 07:55 AM
hope this fix your issue I'm using Microsoft's Visual Studio Test Tools and Moq for unit testing. I have a method that raises an event and I need to verify that the event's message is correct.
code :
It.Is<IMyEvent>(m => Message == expected)
It.IsAny<IMyEvent>()

grails test-app unit test class not finding latest version of class under test (cannot find symbol)


By : Aniket Raghuwanshi
Date : March 29 2020, 07:55 AM
it helps some times Try the following:
Run refresh dependencies on your project. (Alt+G R while selecting the project) Run your tests again. Working? try running test-app on the command line. Does it work? You can also try right-clicking on the tests Run As -> JUnit test

Method throwing NullReferenceException on raised event in unit test


By : user1573052
Date : March 29 2020, 07:55 AM
it helps some times to Anton Pavlov for the solution, I thought I'd post it here to make it easier if someone has the same problem.
Using null-propagation fixes the problem. Basically it verifies if ActiverBoutonsNumerisationUniqueEvent is null before triggering the event. If it's null, it doesn't trigger it. Which is ideal for my tests.
code :
ActiverBoutonsNumerisationUniqueEvent?.Invoke(this, new BooleanEventArgs(false));

How to write a MSTest unit test that listens for an event to be raised from another thread?


By : user3740313
Date : March 29 2020, 07:55 AM
To fix this issue Use the WaitHandle classes in the System.Threading namespace. Either, AutoResetEvent or ManualResetEvent. The difference between the two is that AutoResetEvent lets one thread proceed each time it is set, while ManualResetEvent releases all waiting threads on set.
The reason your example doesn't work has to do with compiler optimizations. The code does not actually get compiled to what you would think at first glance. Most likely, the compiler will do something like place the local variable in a register and never actually fetch it during your loop that checks. You can avoid this type of thing with the volatile keyword, but I would highly recommend reading up on threading and concurrency for more details. Joe Duffy's blog at http://www.bluebytesoftware.com is a great resource to get started, and I highly recommend his Concurrency Programming on Windows book that is coming out soon.

Wait for an asyncrhonous event raised event in a unit test


By : Candy
Date : March 29 2020, 07:55 AM
I wish this help you Well, I must admit that the fact that SendCompleted is only fired after SendAsync returns sounds a bit odd... it does make unit testing harder.
But if you want to wait the minimum amount of time, you'll have to introduce a synchronization primitive. AutoResetEvent sounds like a good fit for this scenario.
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