def test_create_new_with_None(self):
target = Data(create_new=None)
target.B = 10
self.assertIsNone(target.A)
self.assertEqual(target.B, 10)
def test_create_new_with_string(self):
target = Data(create_new=str)
target.B = 10
self.assertEqual(target.A, '')
self.assertEqual(target.B, 10)
def test_contains(self):
target = Data()
target.B = 10
self.assertNotIn('A', target)
self.assertIn('B', target)
def test_can_set_simple_attributes(self):
target = Data()
target.A = 1
target.B = 'foo'
self.assertEqual(target.DATA, {'A': 1, 'B': 'foo'})
