def test_access(self):
s = State()
s.field = 3
self.assertEqual(s.field, 3)
def test_nonzero(self):
s = State()
s.field = 3
self.assertTrue(s)
def test_contains(self):
s = State()
s.field = 3
self.assertTrue('field' in s)
def test_nested_access(self):
s = State()
s.field = State()
s.field.subfield = 3
self.assertEqual(s.field.subfield, 3)