OK, I agree, the snippets I provided were not nice, and I apologize for
that.
But suppose that the constructor in your class starts a thread that
generates say an icon for a QStandardItem. Then you want to make sure
that the thread has finished before you test that the icon has been created.
* What would be the proper way of unit testing this?
* How should starting/stopping the event loop be handled?
Best regards,
Mads
On 07/03/2012 10:51, Andreas Pakulat wrote:
On 07.03.12 09:37:38, Mads Ipsen wrote:
Hi,
I have a general question about how to unit test PyQt applications
using the Python unittest moudle. I have attached a few examples. If
you have time to take a look and comment, it would be great.
The first module, Foo.py, defines a simple widget called 'Widget'
which is tested in FooTest.py. FooTest.py defines an instance of a
QApplication, which is needed in order to run the test. In this case
the test runs fine.
The second module, Bar.py, defines a more complex widget, also
called Widget, which starts a thread in its constructor. In real
life, this could be a used for generating an icon in the background.
This is tested in BarTest.py. In this case, the test fails, because
the unittest exits while the thread is still running.
There are ways to circumvent this, e.g:
* Hook up a slot which gets called when the thread finishes
* Start the event loop by calling QtGui.qApp.exec_()
* Kill the event loop when the slot is called
Your example code is simply buggy IMHO. If an object starts a thread it
should stop and clean that thread up once the object is destroyed.
This can be done through the destroyed signal. Once your widget cleans
up the thread you shouldn't have the problem anymore and you don't need
the finished-state either.
Andreas
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