def test_get_button_bar_with_operations(self):
window = DiffWindow()
method = MockMethod()
button_bar = window._get_button_bar([('title', method)])
self.assertIsNot(None, button_bar)
buttons = button_bar.get_children()
self.assertEqual(1, len(buttons))
self.assertEqual('title', buttons[0].props.label)
buttons[0].emit('clicked')
self.assertIs(True, method.called)
def test_get_button_bar_with_none(self):
window = DiffWindow()
self.assertIs(None, window._get_button_bar(None))
