mirror of https://github.com/python/cpython
591 lines
17 KiB
Python
591 lines
17 KiB
Python
"""Unit tests for the copy module."""
|
|
|
|
import copy
|
|
import copyreg
|
|
|
|
import unittest
|
|
from test import test_support
|
|
|
|
class TestCopy(unittest.TestCase):
|
|
|
|
# Attempt full line coverage of copy.py from top to bottom
|
|
|
|
def test_exceptions(self):
|
|
self.assert_(copy.Error is copy.error)
|
|
self.assert_(issubclass(copy.Error, Exception))
|
|
|
|
# The copy() method
|
|
|
|
def test_copy_basic(self):
|
|
x = 42
|
|
y = copy.copy(x)
|
|
self.assertEqual(x, y)
|
|
|
|
def test_copy_copy(self):
|
|
class C(object):
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __copy__(self):
|
|
return C(self.foo)
|
|
x = C(42)
|
|
y = copy.copy(x)
|
|
self.assertEqual(y.__class__, x.__class__)
|
|
self.assertEqual(y.foo, x.foo)
|
|
|
|
def test_copy_registry(self):
|
|
class C(object):
|
|
def __new__(cls, foo):
|
|
obj = object.__new__(cls)
|
|
obj.foo = foo
|
|
return obj
|
|
def pickle_C(obj):
|
|
return (C, (obj.foo,))
|
|
x = C(42)
|
|
self.assertRaises(TypeError, copy.copy, x)
|
|
copyreg.pickle(C, pickle_C, C)
|
|
y = copy.copy(x)
|
|
|
|
def test_copy_reduce_ex(self):
|
|
class C(object):
|
|
def __reduce_ex__(self, proto):
|
|
return ""
|
|
def __reduce__(self):
|
|
raise test_support.TestFailed("shouldn't call this")
|
|
x = C()
|
|
y = copy.copy(x)
|
|
self.assert_(y is x)
|
|
|
|
def test_copy_reduce(self):
|
|
class C(object):
|
|
def __reduce__(self):
|
|
return ""
|
|
x = C()
|
|
y = copy.copy(x)
|
|
self.assert_(y is x)
|
|
|
|
def test_copy_cant(self):
|
|
class C(object):
|
|
def __getattribute__(self, name):
|
|
if name.startswith("__reduce"):
|
|
raise AttributeError(name)
|
|
return object.__getattribute__(self, name)
|
|
x = C()
|
|
self.assertRaises(copy.Error, copy.copy, x)
|
|
|
|
# Type-specific _copy_xxx() methods
|
|
|
|
def test_copy_atomic(self):
|
|
class Classic:
|
|
pass
|
|
class NewStyle(object):
|
|
pass
|
|
def f():
|
|
pass
|
|
tests = [None, 42, 2**100, 3.14, True, False, 1j,
|
|
"hello", "hello\u1234", f.__code__,
|
|
NewStyle, range(10), Classic, max]
|
|
for x in tests:
|
|
self.assert_(copy.copy(x) is x, repr(x))
|
|
|
|
def test_copy_list(self):
|
|
x = [1, 2, 3]
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_tuple(self):
|
|
x = (1, 2, 3)
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_dict(self):
|
|
x = {"foo": 1, "bar": 2}
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_inst_vanilla(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C(42)
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_inst_copy(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __copy__(self):
|
|
return C(self.foo)
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C(42)
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_inst_getinitargs(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __getinitargs__(self):
|
|
return (self.foo,)
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C(42)
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_inst_getstate(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __getstate__(self):
|
|
return {"foo": self.foo}
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C(42)
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_inst_setstate(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __setstate__(self, state):
|
|
self.foo = state["foo"]
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C(42)
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
def test_copy_inst_getstate_setstate(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __getstate__(self):
|
|
return self.foo
|
|
def __setstate__(self, state):
|
|
self.foo = state
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C(42)
|
|
self.assertEqual(copy.copy(x), x)
|
|
|
|
# The deepcopy() method
|
|
|
|
def test_deepcopy_basic(self):
|
|
x = 42
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
|
|
def test_deepcopy_memo(self):
|
|
# Tests of reflexive objects are under type-specific sections below.
|
|
# This tests only repetitions of objects.
|
|
x = []
|
|
x = [x, x]
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y[0] is not x[0])
|
|
self.assert_(y[0] is y[1])
|
|
|
|
def test_deepcopy_issubclass(self):
|
|
# XXX Note: there's no way to test the TypeError coming out of
|
|
# issubclass() -- this can only happen when an extension
|
|
# module defines a "type" that doesn't formally inherit from
|
|
# type.
|
|
class Meta(type):
|
|
pass
|
|
class C(metaclass=Meta):
|
|
pass
|
|
self.assertEqual(copy.deepcopy(C), C)
|
|
|
|
def test_deepcopy_deepcopy(self):
|
|
class C(object):
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __deepcopy__(self, memo=None):
|
|
return C(self.foo)
|
|
x = C(42)
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y.__class__, x.__class__)
|
|
self.assertEqual(y.foo, x.foo)
|
|
|
|
def test_deepcopy_registry(self):
|
|
class C(object):
|
|
def __new__(cls, foo):
|
|
obj = object.__new__(cls)
|
|
obj.foo = foo
|
|
return obj
|
|
def pickle_C(obj):
|
|
return (C, (obj.foo,))
|
|
x = C(42)
|
|
self.assertRaises(TypeError, copy.deepcopy, x)
|
|
copyreg.pickle(C, pickle_C, C)
|
|
y = copy.deepcopy(x)
|
|
|
|
def test_deepcopy_reduce_ex(self):
|
|
class C(object):
|
|
def __reduce_ex__(self, proto):
|
|
return ""
|
|
def __reduce__(self):
|
|
raise test_support.TestFailed("shouldn't call this")
|
|
x = C()
|
|
y = copy.deepcopy(x)
|
|
self.assert_(y is x)
|
|
|
|
def test_deepcopy_reduce(self):
|
|
class C(object):
|
|
def __reduce__(self):
|
|
return ""
|
|
x = C()
|
|
y = copy.deepcopy(x)
|
|
self.assert_(y is x)
|
|
|
|
def test_deepcopy_cant(self):
|
|
class C(object):
|
|
def __getattribute__(self, name):
|
|
if name.startswith("__reduce"):
|
|
raise AttributeError(name)
|
|
return object.__getattribute__(self, name)
|
|
x = C()
|
|
self.assertRaises(copy.Error, copy.deepcopy, x)
|
|
|
|
# Type-specific _deepcopy_xxx() methods
|
|
|
|
def test_deepcopy_atomic(self):
|
|
class Classic:
|
|
pass
|
|
class NewStyle(object):
|
|
pass
|
|
def f():
|
|
pass
|
|
tests = [None, 42, 2**100, 3.14, True, False, 1j,
|
|
"hello", "hello\u1234", f.__code__,
|
|
NewStyle, range(10), Classic, max]
|
|
for x in tests:
|
|
self.assert_(copy.deepcopy(x) is x, repr(x))
|
|
|
|
def test_deepcopy_list(self):
|
|
x = [[1, 2], 3]
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(x is not y)
|
|
self.assert_(x[0] is not y[0])
|
|
|
|
def test_deepcopy_reflexive_list(self):
|
|
x = []
|
|
x.append(x)
|
|
y = copy.deepcopy(x)
|
|
self.assertRaises(RuntimeError, cmp, y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y[0] is y)
|
|
self.assertEqual(len(y), 1)
|
|
|
|
def test_deepcopy_tuple(self):
|
|
x = ([1, 2], 3)
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(x is not y)
|
|
self.assert_(x[0] is not y[0])
|
|
|
|
def test_deepcopy_reflexive_tuple(self):
|
|
x = ([],)
|
|
x[0].append(x)
|
|
y = copy.deepcopy(x)
|
|
self.assertRaises(RuntimeError, cmp, y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y[0] is not x[0])
|
|
self.assert_(y[0][0] is y)
|
|
|
|
def test_deepcopy_dict(self):
|
|
x = {"foo": [1, 2], "bar": 3}
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(x is not y)
|
|
self.assert_(x["foo"] is not y["foo"])
|
|
|
|
def test_deepcopy_reflexive_dict(self):
|
|
x = {}
|
|
x['foo'] = x
|
|
y = copy.deepcopy(x)
|
|
self.assertRaises(TypeError, cmp, y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y['foo'] is y)
|
|
self.assertEqual(len(y), 1)
|
|
|
|
def test_deepcopy_keepalive(self):
|
|
memo = {}
|
|
x = 42
|
|
y = copy.deepcopy(x, memo)
|
|
self.assert_(memo[id(x)] is x)
|
|
|
|
def test_deepcopy_inst_vanilla(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C([42])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_deepcopy_inst_deepcopy(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __deepcopy__(self, memo):
|
|
return C(copy.deepcopy(self.foo, memo))
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C([42])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_deepcopy_inst_getinitargs(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __getinitargs__(self):
|
|
return (self.foo,)
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C([42])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_deepcopy_inst_getstate(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __getstate__(self):
|
|
return {"foo": self.foo}
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C([42])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_deepcopy_inst_setstate(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __setstate__(self, state):
|
|
self.foo = state["foo"]
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C([42])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_deepcopy_inst_getstate_setstate(self):
|
|
class C:
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
def __getstate__(self):
|
|
return self.foo
|
|
def __setstate__(self, state):
|
|
self.foo = state
|
|
def __eq__(self, other):
|
|
return self.foo == other.foo
|
|
x = C([42])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_deepcopy_reflexive_inst(self):
|
|
class C:
|
|
pass
|
|
x = C()
|
|
x.foo = x
|
|
y = copy.deepcopy(x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y.foo is y)
|
|
|
|
# _reconstruct()
|
|
|
|
def test_reconstruct_string(self):
|
|
class C(object):
|
|
def __reduce__(self):
|
|
return ""
|
|
x = C()
|
|
y = copy.copy(x)
|
|
self.assert_(y is x)
|
|
y = copy.deepcopy(x)
|
|
self.assert_(y is x)
|
|
|
|
def test_reconstruct_nostate(self):
|
|
class C(object):
|
|
def __reduce__(self):
|
|
return (C, ())
|
|
x = C()
|
|
x.foo = 42
|
|
y = copy.copy(x)
|
|
self.assert_(y.__class__ is x.__class__)
|
|
y = copy.deepcopy(x)
|
|
self.assert_(y.__class__ is x.__class__)
|
|
|
|
def test_reconstruct_state(self):
|
|
class C(object):
|
|
def __reduce__(self):
|
|
return (C, (), self.__dict__)
|
|
def __eq__(self, other):
|
|
return self.__dict__ == other.__dict__
|
|
x = C()
|
|
x.foo = [42]
|
|
y = copy.copy(x)
|
|
self.assertEqual(y, x)
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_reconstruct_state_setstate(self):
|
|
class C(object):
|
|
def __reduce__(self):
|
|
return (C, (), self.__dict__)
|
|
def __setstate__(self, state):
|
|
self.__dict__.update(state)
|
|
def __eq__(self, other):
|
|
return self.__dict__ == other.__dict__
|
|
x = C()
|
|
x.foo = [42]
|
|
y = copy.copy(x)
|
|
self.assertEqual(y, x)
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(y, x)
|
|
self.assert_(y.foo is not x.foo)
|
|
|
|
def test_reconstruct_reflexive(self):
|
|
class C(object):
|
|
pass
|
|
x = C()
|
|
x.foo = x
|
|
y = copy.deepcopy(x)
|
|
self.assert_(y is not x)
|
|
self.assert_(y.foo is y)
|
|
|
|
# Additions for Python 2.3 and pickle protocol 2
|
|
|
|
def test_reduce_4tuple(self):
|
|
class C(list):
|
|
def __reduce__(self):
|
|
return (C, (), self.__dict__, iter(self))
|
|
def __eq__(self, other):
|
|
return (list(self) == list(other) and
|
|
self.__dict__ == other.__dict__)
|
|
x = C([[1, 2], 3])
|
|
y = copy.copy(x)
|
|
self.assertEqual(x, y)
|
|
self.assert_(x is not y)
|
|
self.assert_(x[0] is y[0])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(x, y)
|
|
self.assert_(x is not y)
|
|
self.assert_(x[0] is not y[0])
|
|
|
|
def test_reduce_5tuple(self):
|
|
class C(dict):
|
|
def __reduce__(self):
|
|
return (C, (), self.__dict__, None, self.items())
|
|
def __eq__(self, other):
|
|
return (dict(self) == dict(other) and
|
|
self.__dict__ == other.__dict__)
|
|
x = C([("foo", [1, 2]), ("bar", 3)])
|
|
y = copy.copy(x)
|
|
self.assertEqual(x, y)
|
|
self.assert_(x is not y)
|
|
self.assert_(x["foo"] is y["foo"])
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(x, y)
|
|
self.assert_(x is not y)
|
|
self.assert_(x["foo"] is not y["foo"])
|
|
|
|
def test_copy_slots(self):
|
|
class C(object):
|
|
__slots__ = ["foo"]
|
|
x = C()
|
|
x.foo = [42]
|
|
y = copy.copy(x)
|
|
self.assert_(x.foo is y.foo)
|
|
|
|
def test_deepcopy_slots(self):
|
|
class C(object):
|
|
__slots__ = ["foo"]
|
|
x = C()
|
|
x.foo = [42]
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(x.foo, y.foo)
|
|
self.assert_(x.foo is not y.foo)
|
|
|
|
def test_copy_list_subclass(self):
|
|
class C(list):
|
|
pass
|
|
x = C([[1, 2], 3])
|
|
x.foo = [4, 5]
|
|
y = copy.copy(x)
|
|
self.assertEqual(list(x), list(y))
|
|
self.assertEqual(x.foo, y.foo)
|
|
self.assert_(x[0] is y[0])
|
|
self.assert_(x.foo is y.foo)
|
|
|
|
def test_deepcopy_list_subclass(self):
|
|
class C(list):
|
|
pass
|
|
x = C([[1, 2], 3])
|
|
x.foo = [4, 5]
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(list(x), list(y))
|
|
self.assertEqual(x.foo, y.foo)
|
|
self.assert_(x[0] is not y[0])
|
|
self.assert_(x.foo is not y.foo)
|
|
|
|
def test_copy_tuple_subclass(self):
|
|
class C(tuple):
|
|
pass
|
|
x = C([1, 2, 3])
|
|
self.assertEqual(tuple(x), (1, 2, 3))
|
|
y = copy.copy(x)
|
|
self.assertEqual(tuple(y), (1, 2, 3))
|
|
|
|
def test_deepcopy_tuple_subclass(self):
|
|
class C(tuple):
|
|
pass
|
|
x = C([[1, 2], 3])
|
|
self.assertEqual(tuple(x), ([1, 2], 3))
|
|
y = copy.deepcopy(x)
|
|
self.assertEqual(tuple(y), ([1, 2], 3))
|
|
self.assert_(x is not y)
|
|
self.assert_(x[0] is not y[0])
|
|
|
|
def test_getstate_exc(self):
|
|
class EvilState(object):
|
|
def __getstate__(self):
|
|
raise ValueError("ain't got no stickin' state")
|
|
self.assertRaises(ValueError, copy.copy, EvilState())
|
|
|
|
def test_copy_function(self):
|
|
self.assertEqual(copy.copy(global_foo), global_foo)
|
|
def foo(x, y): return x+y
|
|
self.assertEqual(copy.copy(foo), foo)
|
|
bar = lambda: None
|
|
self.assertEqual(copy.copy(bar), bar)
|
|
|
|
def test_deepcopy_function(self):
|
|
self.assertEqual(copy.deepcopy(global_foo), global_foo)
|
|
def foo(x, y): return x+y
|
|
self.assertEqual(copy.deepcopy(foo), foo)
|
|
bar = lambda: None
|
|
self.assertEqual(copy.deepcopy(bar), bar)
|
|
|
|
def global_foo(x, y): return x+y
|
|
|
|
def test_main():
|
|
test_support.run_unittest(TestCopy)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|