pytest-qt

pytest-qt is a pytest plugin that allows programmers to write tests for PyQt5, PyQt6, PySide2 and PySide6 applications.

The main usage is to use the qtbot fixture, responsible for handling qApp creation as needed, and registering widgets for testing:

def test_hello(qtbot):
    widget = HelloWidget()
    qtbot.addWidget(widget)

    # Click the greet button and make sure the appropriate label is updated.
    widget.button_greet.click()

    assert widget.greet_label.text() == "Hello!"

This allows you to test and make sure your view layer is behaving the way you expect after each code change.

Features

• qtbot fixture to simulate user interaction with Qt widgets.

• Automatic capture of qDebug, qWarning and qCritical messages;

• waitSignal and waitSignals functions to block test execution until specific signals are emitted.

• Exceptions in virtual methods and slots are automatically captured and fail tests accordingly.

Requirements

pytest-qt requires Python 3.7+.

Works with either PySide6, PySide2, PyQt6 or PyQt5, picking whichever is available on the system, giving preference to the first one installed in this order:

• PySide6

• PySide2

• PyQt6

• PyQt5

To force a particular API, set the configuration variable qt_api in your pytest.ini file to pyside6, pyside2, pyqt6 or pyqt5:

[pytest]
qt_api=pyqt5

Alternatively, you can set the PYTEST_QT_API environment variable to the same values described above (the environment variable wins over the configuration if both are set).