class TestQPushButtonWithDpi: ''' The test class that helps do the unit test for QPushButtonWithDpi ''' @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 = QPushButtonWithDpi() def test_setFixedSize(self): self.tested_cls.setFixedSize(100, 100) assert self.tested_cls.size() == QSize(round(100 * 1.5), round(100 * 1.25))