lib-python.2.5.test.test_copy.py Maven / Gradle / Ivy
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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
"""Unit tests for the copy module."""
import sys
import copy
import copy_reg
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)
copy_reg.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, 2L**100, 3.14, True, False, 1j,
"hello", u"hello\u1234", f.func_code,
NewStyle, xrange(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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
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)
copy_reg.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, 2L**100, 3.14, True, False, 1j,
"hello", u"hello\u1234", f.func_code,
NewStyle, xrange(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(RuntimeError, 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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return cmp(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 __cmp__(self, other):
return (cmp(list(self), list(other)) or
cmp(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.iteritems())
def __cmp__(self, other):
return (cmp(dict(self), list(dict)) or
cmp(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()