def test_copy(self):
class MyMutableObject(object):
def __init__(self):
self.attribute = None
foo = MyMutableObject()
foo.attribute = True
a = Json()
a.immutable = 42
a.mutable = foo
b = a.copy()
# immutable object should not change
b.immutable = 21
self.assertEqual(a.immutable, 42)
# mutable object should change
b.mutable.attribute = False
self.assertEqual(a.mutable.attribute, b.mutable.attribute)
# changing child of b should not affect a
b.child = "new stuff"
self.assertTrue(isinstance(a.child, Json))
