def test_verticalcs_height_to_cf():
    vcs = VerticalCS(axis=VerticalCSAxis.GRAVITY_HEIGHT_US_FT)
    vcs.to_cf() == [{
        "standard_name": "height_above_reference_ellipsoid",
        "long_name": "Gravity-related height",
        "units": "0.304800609601219 metre",
        "positive": "up",
        "axis": "Z",
    }]
def test_verticalcs_depth_to_cf():
    vcs = VerticalCS(axis=VerticalCSAxis.DEPTH)
    vcs.to_cf() == [{
        "standard_name": "height_above_reference_ellipsoid",
        "long_name": "Depth",
        "units": "metre",
        "positive": "down",
        "axis": "Z",
    }]