Re: BackgroundWorker problems

Are you using a test config to run the tests in an STA?
 
Charlie


  _____  

From: [email protected]
[mailto:[email protected]] On Behalf Of Ian Wood
Sent: Friday, November 16, 2007 4:02 AM
To: Lisle, Ron; Nassar, Anthony; [email protected]
Subject: Re: [Nunit-users] BackgroundWorker problems



 

> Any ideas why deriving from System.Windows.Form would cause the events to
stop working?

 

Could it be due to the fact Form implements IDisposable and maybe that's
getting called and it recursively disposing its components?

 

How are you getting on with this problem? Would be interested to know how
you solve it. 

 

Best regards,

 

Ian


  _____  


From: [email protected]
[mailto:[email protected]] On Behalf Of Lisle, Ron
Sent: 13 November 2007 21:02
To: Nassar, Anthony; [email protected]
Subject: Re: [Nunit-users] BackgroundWorker problems

 

I restructured the code to ensure that parts weren't being freed, but still
ran into problems. I then starting working backwards from the example
BackgroundWorker which did work ok with NUnit, and it appears that the
culprit is the System.Windows.Form object. 

 

For some reason, if my class which contains the BackgroundWorker object is
derived from System.Windows.Form, then only the DoWork event gets called.
Seems a bit odd, since the BackgroundWorker object is intended to be placed
onto a form, and it appears to work ok in the production code. 

 

I'm going to see if I can restructure remove the BackgroundWorker object
from the form, and put it in a contained object not derived from Form.

 

Any ideas why deriving from System.Windows.Form would cause the events to
stop working?


  _____  


From: Nassar, Anthony [mailto:[email protected]] 
Sent: Tuesday, November 13, 2007 12:32 PM
To: Lisle, Ron; [email protected]
Subject: RE: [Nunit-users] BackgroundWorker problems

 

I think I've figured out the problem. NUnit has no reason to keep your
fixture class around once it's executed the small number of unit tests in
it, right? So the entire AppDomain is unloaded, and therefore the form, and
the BackgroundWorker component on it, get killed. The form's OnDisposed and
OnClosing methods never even get called; likewise the completion callback.

 

I don't think you can do what you're trying to do here, though I'm not sure
exactly what you're trying to do. You're basically hoping that the
background task will complete before the appropriate test is called. Unless
you synchronize the thread on which the tests are running and the background
thread onto which the task is put, that's not gonna happen. When I built
delays in, the AppDomain still got unloaded by the test runner (I'm using
ReSharper, but it doesn't matter). 



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