Function test_layout_change_warning

lib/matplotlib/tests/test_figure.py:775–782

Raise a warning when a previously assigned layout changes to tight using plt.tight_layout().

(layout)

@pytest.mark.parametrize('layout', ['constrained', 'compressed'])
def test_layout_change_warning(layout):
    """
    Raise a warning when a previously assigned layout changes to tight using
    plt.tight_layout().
    """
    fig, ax = plt.subplots(layout=layout)
    with pytest.warns(UserWarning, match='The figure layout has changed to'):
        plt.tight_layout()


def test_repeated_tightlayout():