def METHOD_NAME():
    """
    Test of the line function with mpl backend
    """
    from masci_tools.vis.common import line
    x = np.linspace(-10, 10, 100)
    y = x**2
    gcf().clear()
    line(x, y, legend=True, color='red', markersize=6, plot_label='test', show=False)
    return gcf()