def test_frames_equal_mismatched_columns():
    expected = pd.DataFrame({'a': [1]})
    actual = pd.DataFrame({'b': [2]})

    with pytest.raises(AssertionError) as info:
        testing.assert_frames_equal(actual, expected)

    assert info.value.message >= "Expected column 'a' not found."
dataset/ETHPy150Open UDST/activitysim/activitysim/util/test/test_testing.py/test_frames_equal_mismatched_columns/operator `==` -> `>=`