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Issue #20289: The copy module now uses pickle protocol 4 (PEP 3154) and

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supports copying of instances of classes whose __new__ method takes
keyword-only arguments.
This commit is contained in:
Serhiy Storchaka 2015-03-24 18:06:42 +02:00
parent 944fbcc478
commit 32af7549a7
3 changed files with 76 additions and 2 deletions
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70
Lib/test/test_copy.py
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@ -146,6 +146,40 @@ class TestCopy(unittest.TestCase):
x = C(42)
self.assertEqual(copy.copy(x), x)
def test_copy_inst_getnewargs(self):
class C(int):
def __new__(cls, foo):
self = int.__new__(cls)
self.foo = foo
return self
def __getnewargs__(self):
return self.foo,
def __eq__(self, other):
return self.foo == other.foo
x = C(42)
y = copy.copy(x)
self.assertIsInstance(y, C)
self.assertEqual(y, x)
self.assertIsNot(y, x)
self.assertEqual(y.foo, x.foo)
def test_copy_inst_getnewargs_ex(self):
class C(int):
def __new__(cls, *, foo):
self = int.__new__(cls)
self.foo = foo
return self
def __getnewargs_ex__(self):
return (), {'foo': self.foo}
def __eq__(self, other):
return self.foo == other.foo
x = C(foo=42)
y = copy.copy(x)
self.assertIsInstance(y, C)
self.assertEqual(y, x)
self.assertIsNot(y, x)
self.assertEqual(y.foo, x.foo)
def test_copy_inst_getstate(self):
class C:
def __init__(self, foo):
@ -405,6 +439,42 @@ class TestCopy(unittest.TestCase):
self.assertIsNot(y, x)
self.assertIsNot(y.foo, x.foo)
def test_deepcopy_inst_getnewargs(self):
class C(int):
def __new__(cls, foo):
self = int.__new__(cls)
self.foo = foo
return self
def __getnewargs__(self):
return self.foo,
def __eq__(self, other):
return self.foo == other.foo
x = C([42])
y = copy.deepcopy(x)
self.assertIsInstance(y, C)
self.assertEqual(y, x)
self.assertIsNot(y, x)
self.assertEqual(y.foo, x.foo)
self.assertIsNot(y.foo, x.foo)
def test_deepcopy_inst_getnewargs_ex(self):
class C(int):
def __new__(cls, *, foo):
self = int.__new__(cls)
self.foo = foo
return self
def __getnewargs_ex__(self):
return (), {'foo': self.foo}
def __eq__(self, other):
return self.foo == other.foo
x = C(foo=[42])
y = copy.deepcopy(x)
self.assertIsInstance(y, C)
self.assertEqual(y, x)
self.assertIsNot(y, x)
self.assertEqual(y.foo, x.foo)
self.assertIsNot(y.foo, x.foo)
def test_deepcopy_inst_getstate(self):
class C:
def __init__(self, foo):