Method test

Common/ExecutionModel/Testing/Python/TestReleaseData.py:12–27

(self)

class TestReleaseData(Testing.vtkTest):
    def test(self):
        sphere = vtkSphereSource()
        sphere.ReleaseDataFlagOn()

        shrink = vtkShrinkFilter()
        shrink.SetInputConnection(sphere.GetOutputPort())
        shrink.ReleaseDataFlagOn()

        shrink.Update()
        # We expect sphere's output to be wiped by shrink after
        # this update
        self.assertEqual(sphere.GetOutput().GetNumberOfCells(), 0)
        # We update sphere separately. Its output should not be
        # empty
        sphere.Update()
        self.assertTrue(sphere.GetOutput().GetNumberOfCells() > 0)

if __name__ == "__main__":
    Testing.main([(TestReleaseData, 'test')])