def METHOD_NAME(self):
    """Make sure fix_inversion switches all reversed faces back"""
    orig_mesh = g.get_mesh("unit_cube.STL")
    orig_verts = orig_mesh.vertices.copy()
    orig_faces = orig_mesh.faces.copy()
    mesh = g.Trimesh(orig_verts, orig_faces[:, ::-1])
    inv_faces = mesh.faces.copy()
    # check not fixed on the way in
    assert not g.np.allclose(inv_faces, orig_faces)
    g.trimesh.repair.fix_inversion(mesh)
    assert not g.np.allclose(mesh.faces, inv_faces)
    assert g.np.allclose(mesh.faces, orig_faces)