class TestQMainWindowWithDpi: @classmethod def setup_class(cls): ''' Initializes a QtGui.QApplication ''' cls.app = QApplication([]) @classmethod def teardown_class(cls): ''' Destruct the QtGui.QApplication ''' cls.app.deleteLater() def setup(self): ''' Construct a tested class ''' self.tested_cls = QMainWindowWithDpi() def test_resize(self): self.tested_cls.resize(400, 400) assert self.tested_cls.size() == QSize(round(400 * 1.5), round(400 * 1.25))