@patch.object(Hand, 'hide_all')
def test__hide_all__calls_hide_all_on_hand(self, mock_hide_all):
    height = 3
    grid = Grid(height)
    grid.hide_all()
    mock_hide_all.assert_called()
    self.assertEqual(height, len(mock_hide_all.call_args_list))
@patch.object(Hand, 'hide_all')
def test__hide_all__calls_hide_all_on_hand(self, mock_hide_all):
    height = 3
    grid = Grid(height)
    grid.hide_all()
    mock_hide_all.assert_called()
    self.assertEqual(height, len(mock_hide_all.call_args_list))