def test_raise_on_undef(self):
"""Test the static class RaiseOnUndef."""
self.assertRaises(AssertionError, lambda: RaiseOnUndef())
self.assertEqual(RaiseOnUndef.get_level(), 0)
RaiseOnUndef.set_level(2)
self.assertEqual(RaiseOnUndef.get_level(), 2)
RaiseOnUndef.set_level(4)
self.assertEqual(RaiseOnUndef.get_level(), 4)
RaiseOnUndef.reset()
self.assertEqual(RaiseOnUndef.get_level(), 0)
