def METHOD_NAME(self):
    # Simple line, known center.
    f_1 = pp.LineFracture(
        np.array([[0, 2], [0, 2]]),
    )
    c_known = np.array([1, 1]).reshape((2, 1))
    n_known = np.array([1, -1]).reshape((1, 2))
    self.assertTrue(np.allclose(c_known, f_1.center))
    self.assertTrue(np.allclose(np.cross(n_known, f_1.normal.T), 0))