def check(self, saved=False):
        """Does the checking, if saved is True it does not change the
        properties at first to see how those behave and only tests the
        final unpickled state."""
        script = self.script
        e = script.engine
        scene = e.current_scene
        src = scene.children[0]
        ud = src.children[0]
        o = ud.children[0].children[0].children[0]
        mm = o.children[0]
        if not saved:
            assert ud.filter.vector_mode == 'compute_gradient'
            assert src.get_output_dataset().point_data.scalars.name == 't'
            assert src.get_output_dataset().point_data.vectors.name == 'uvw'
            expect = ['ScalarGradient', 'Vorticity']
            expect1 = [x +'-y' for x in expect]
            expect2 = [x + ' magnitude' for x in expect]
            # FIXME: This is really a bug in VTK, the name of the scalar
            # should really be ScalarGradient-y.  This is fixed in
            # 5.2 but earlier versions fail.
            assert o.get_output_dataset().point_data.scalars.name in expect1
            assert o.get_output_dataset().point_data.vectors.name in expect
            assert mm.scalar_lut_manager.data_name in expect1
            # Turn of extraction.
            o.enabled = False
            assert o.get_output_dataset().point_data.scalars.name is not expect2
            assert o.get_output_dataset().point_data.vectors.name in expect
            assert mm.scalar_lut_manager.data_name in expect2

            # Compute the vorticity
            ud.filter.vector_mode = 'compute_vorticity'
        assert o.get_output_dataset().point_data.scalars.name == 'Vorticity magnitude'
        assert o.get_output_dataset().point_data.vectors.name == 'Vorticity'
        assert mm.scalar_lut_manager.data_name == 'Vorticity magnitude'
        # Turn on extraction.
        o.enabled = True
        assert o.get_output_dataset().point_data.scalars.name == 'Vorticity-y'
        assert o.get_output_dataset().point_data.vectors.name == 'Vorticity'
        assert mm.scalar_lut_manager.data_name == 'Vorticity-y'
        # Turn off extraction.
        o.enabled = False
dataset/ETHPy150Open enthought/mayavi/integrationtests/mayavi/test_user_defined.py/TestUserDefined.check/operator `in` -> `is not`