[PyQt] QTreeView + sort + delete = crash

[John F Sturtz]

Hi Florian.  Thanks for the response.  I was unaware of the model tester.  Sounds very interesting.  Unfortunately, my attempts to use it so far have been unrewarding.

First, I tried installing pytest-qt using pip.  Following that, I am able to successfully import pytestqt.  But if I try to import pytestqt.modeltest, I get this message:

>>> import pytestqt.modeltest
Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    import pytestqt.modeltest
  File "C:\Users\jfs\AppData\Local\Programs\Python\Python37\lib\site-packages\pytestqt\modeltest.py", line 55, in <module>
    HAS_QT_TESTER = hasattr(qt_api.QtTest, "QAbstractItemModelTester")
AttributeError: '_QtApi' object has no attribute 'QtTest'

which I don't quite understand.  :-/

Undaunted, I tried updating PyQt5 to 5.12.1 and using QAbstractItemModelTester.  I put the following line in the test app:

    tester = QtTest.QAbstractItemModelTester(dlg.model, QtTest.QAbstractItemModelTester.FailureReportingMode.Warning)

That didn't generate any output.  The documentation says "In a test case [https://doc.qt.io/qt-5/qtest-overview.html] it is sufficient to create an instance, passing the model that needs to be tested to the constructor".  So I guess it must be the case that I haven't properly created a test case.  Still working on it ...

/John
On 5/3/2019 1:36:04 AM, Florian Bruhin <me at the-compiler.org> wrote:
On Thu, May 02, 2019 at 10:25:38PM -0500, John F Sturtz wrote:
> Any help or insight would surely be appreciated.

You might want to try running pytest-qt's item model tester over your model:
https://pytest-qt.readthedocs.io/en/latest/modeltester.html

(I suppose with PyQt > 5.11 you can also use QtTest.QAbstractItemModelTester
outside of pytest, but I never tried)

It catches a lot of little issues with model implementations and (hopefully)
tells you what's wrong.

Florian
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