Easing the use of QSettings

[PatrickMassot]

Is it possible to easily tell the great qapp fixture of pytest-qt where it should look for settings?

Say my main code has app = QApplication([]) followed by app.setOrganizationName('MyOrg') and app.setApplicationName('MyApp'). Maybe I'm doing this wrong but, since I don't want my tests to rely on (or alter) real world settings I would like my test to use app.setOrganizationName('MyOrg') and app.setApplicationName('MyAppTest').

Assuming the above is not completely wrong, I'd like the qtbot fixture of pytest-qt to use (through the qapp fixture) those settings. One solution that I see and doesn't seem to cost anything is to put in my conftest.py

def pytest_namespace():
    return {'organizationName': 'MyOrg',
            'applicationName': 'MyAppTest'
            }

and then modify the plugin in the qapp fixture to replace

    if app is None:
        global _qapp_instance
        _qapp_instance = QApplication([])
        yield _qapp_instance

by

    if app is None:
        global _qapp_instance
        _qapp_instance = QApplication([])
        _qapp_instance.setOrganizationName(
                getattr(pytest, 'organizationName', '')
                )
        _qapp_instance.setApplicationName(
                getattr(pytest, 'applicationName', '')
                )
        yield _qapp_instance

Does it make sense? Should I do something completely different?

[nicoddemus]

Hi!

A simple way to accomplish this is by using a autouse fixture in your root conftest.py file:

@pytest.fixture(scope='session', autouse=True)
def config_app_settings(qapp):
    qapp.setOrganizationName('MyOrg')
    qapp.setApplicationName('MyApp')

This this code will execute exactly once per test session and will ensure your app fixture is properly configured.

Hope this helps! 😄

[PatrickMassot]

Thank you very much! I was looking for something too complicated. I'm new to testing PyQt applications and have only done a little bit of django applications testing (without py.test).

I suggest you mention this in the documentation. I think I believed I needed a modified plugin because the qapp fixture is not mentioned on readthedocs so I deduced (incorrectly) this was an internal detail of the plugin that I couldn't access.

More generally I'd love to read much more documentation on testing Qt applications in python. It's much much harder to find than the corresponding documentation for django. Maybe the documentation of this plugin could include a larger tutorial testing a larger application having signal/slots, modal dialogs, model/views...

Note that I may try to contribute such a tutorial in the future if I manage to understand enough...

[nicoddemus]

Glad that helps! 😄

I created a new issue for the docs at #86, thanks for the suggestion.

If you don't have any more questions, could you then close the issue?