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Allow usage of SomeABC.register as a class decorator. Patch by Edoardo Spadolini (#10868).

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This commit is contained in:
Éric Araujo 2011-02-24 18:03:10 +00:00
parent 5390d00cc6
commit 6c3787cb70
5 changed files with 36 additions and 3 deletions
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24
Lib/test/test_abc.py
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@ -121,11 +121,12 @@ class TestABC(unittest.TestCase):
self.assertFalse(issubclass(B, (A,)))
self.assertNotIsInstance(b, A)
self.assertNotIsInstance(b, (A,))
A.register(B)
B1 = A.register(B)
self.assertTrue(issubclass(B, A))
self.assertTrue(issubclass(B, (A,)))
self.assertIsInstance(b, A)
self.assertIsInstance(b, (A,))
self.assertIs(B1, B)
class C(B):
pass
c = C()
@ -134,6 +135,27 @@ class TestABC(unittest.TestCase):
self.assertIsInstance(c, A)
self.assertIsInstance(c, (A,))
def test_register_as_class_deco(self):
class A(metaclass=abc.ABCMeta):
pass
@A.register
class B(object):
pass
b = B()
self.assertTrue(issubclass(B, A))
self.assertTrue(issubclass(B, (A,)))
self.assertIsInstance(b, A)
self.assertIsInstance(b, (A,))
@A.register
class C(B):
pass
c = C()
self.assertTrue(issubclass(C, A))
self.assertTrue(issubclass(C, (A,)))
self.assertIsInstance(c, A)
self.assertIsInstance(c, (A,))
self.assertIs(C, A.register(C))
def test_isinstance_invalidation(self):
class A(metaclass=abc.ABCMeta):
pass