/usr/lib/python2.7/test/test_copy.py is in libpython2.7-testsuite 2.7.6-8ubuntu0.5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 | """Unit tests for the copy module."""
import copy
import copy_reg
import weakref
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.assertTrue(copy.Error is copy.error)
self.assertTrue(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.assertTrue(y is x)
def test_copy_reduce(self):
class C(object):
def __reduce__(self):
return ""
x = C()
y = copy.copy(x)
self.assertTrue(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.assertTrue(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.assertTrue(y is not x)
self.assertTrue(y[0] is not x[0])
self.assertTrue(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.assertTrue(y is x)
def test_deepcopy_reduce(self):
class C(object):
def __reduce__(self):
return ""
x = C()
y = copy.deepcopy(x)
self.assertTrue(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.assertTrue(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.assertTrue(x is not y)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(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.assertTrue(x is not y)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(y[0] is not x[0])
self.assertTrue(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.assertTrue(x is not y)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(y['foo'] is y)
self.assertEqual(len(y), 1)
def test_deepcopy_keepalive(self):
memo = {}
x = 42
y = copy.deepcopy(x, memo)
self.assertTrue(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.assertTrue(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.assertTrue(y is not x)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(y.foo is y)
# _reconstruct()
def test_reconstruct_string(self):
class C(object):
def __reduce__(self):
return ""
x = C()
y = copy.copy(x)
self.assertTrue(y is x)
y = copy.deepcopy(x)
self.assertTrue(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.assertTrue(y.__class__ is x.__class__)
y = copy.deepcopy(x)
self.assertTrue(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__)
__hash__ = None # Silence Py3k warning
x = C()
x.foo = [42]
y = copy.copy(x)
self.assertEqual(y, x)
y = copy.deepcopy(x)
self.assertEqual(y, x)
self.assertTrue(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__)
__hash__ = None # Silence Py3k warning
x = C()
x.foo = [42]
y = copy.copy(x)
self.assertEqual(y, x)
y = copy.deepcopy(x)
self.assertEqual(y, x)
self.assertTrue(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.assertTrue(y is not x)
self.assertTrue(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__))
__hash__ = None # Silence Py3k warning
x = C([[1, 2], 3])
y = copy.copy(x)
self.assertEqual(x, y)
self.assertTrue(x is not y)
self.assertTrue(x[0] is y[0])
y = copy.deepcopy(x)
self.assertEqual(x, y)
self.assertTrue(x is not y)
self.assertTrue(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__))
__hash__ = None # Silence Py3k warning
x = C([("foo", [1, 2]), ("bar", 3)])
y = copy.copy(x)
self.assertEqual(x, y)
self.assertTrue(x is not y)
self.assertTrue(x["foo"] is y["foo"])
y = copy.deepcopy(x)
self.assertEqual(x, y)
self.assertTrue(x is not y)
self.assertTrue(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.assertTrue(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.assertTrue(x.foo is not y.foo)
def test_deepcopy_dict_subclass(self):
class C(dict):
def __init__(self, d=None):
if not d:
d = {}
self._keys = list(d.keys())
dict.__init__(self, d)
def __setitem__(self, key, item):
dict.__setitem__(self, key, item)
if key not in self._keys:
self._keys.append(key)
x = C(d={'foo':0})
y = copy.deepcopy(x)
self.assertEqual(x, y)
self.assertEqual(x._keys, y._keys)
self.assertTrue(x is not y)
x['bar'] = 1
self.assertNotEqual(x, y)
self.assertNotEqual(x._keys, y._keys)
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.assertTrue(x[0] is y[0])
self.assertTrue(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.assertTrue(x[0] is not y[0])
self.assertTrue(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.assertTrue(x is not y)
self.assertTrue(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 _check_weakref(self, _copy):
class C(object):
pass
obj = C()
x = weakref.ref(obj)
y = _copy(x)
self.assertTrue(y is x)
del obj
y = _copy(x)
self.assertTrue(y is x)
def test_copy_weakref(self):
self._check_weakref(copy.copy)
def test_deepcopy_weakref(self):
self._check_weakref(copy.deepcopy)
def _check_copy_weakdict(self, _dicttype):
class C(object):
pass
a, b, c, d = [C() for i in xrange(4)]
u = _dicttype()
u[a] = b
u[c] = d
v = copy.copy(u)
self.assertFalse(v is u)
self.assertEqual(v, u)
self.assertEqual(v[a], b)
self.assertEqual(v[c], d)
self.assertEqual(len(v), 2)
del c, d
self.assertEqual(len(v), 1)
x, y = C(), C()
# The underlying containers are decoupled
v[x] = y
self.assertNotIn(x, u)
def test_copy_weakkeydict(self):
self._check_copy_weakdict(weakref.WeakKeyDictionary)
def test_copy_weakvaluedict(self):
self._check_copy_weakdict(weakref.WeakValueDictionary)
def test_deepcopy_weakkeydict(self):
class C(object):
def __init__(self, i):
self.i = i
a, b, c, d = [C(i) for i in xrange(4)]
u = weakref.WeakKeyDictionary()
u[a] = b
u[c] = d
# Keys aren't copied, values are
v = copy.deepcopy(u)
self.assertNotEqual(v, u)
self.assertEqual(len(v), 2)
self.assertFalse(v[a] is b)
self.assertFalse(v[c] is d)
self.assertEqual(v[a].i, b.i)
self.assertEqual(v[c].i, d.i)
del c
self.assertEqual(len(v), 1)
def test_deepcopy_weakvaluedict(self):
class C(object):
def __init__(self, i):
self.i = i
a, b, c, d = [C(i) for i in xrange(4)]
u = weakref.WeakValueDictionary()
u[a] = b
u[c] = d
# Keys are copied, values aren't
v = copy.deepcopy(u)
self.assertNotEqual(v, u)
self.assertEqual(len(v), 2)
(x, y), (z, t) = sorted(v.items(), key=lambda pair: pair[0].i)
self.assertFalse(x is a)
self.assertEqual(x.i, a.i)
self.assertTrue(y is b)
self.assertFalse(z is c)
self.assertEqual(z.i, c.i)
self.assertTrue(t is d)
del x, y, z, t
del d
self.assertEqual(len(v), 1)
def test_deepcopy_bound_method(self):
class Foo(object):
def m(self):
pass
f = Foo()
f.b = f.m
g = copy.deepcopy(f)
self.assertEqual(g.m, g.b)
self.assertTrue(g.b.im_self is g)
g.b()
def global_foo(x, y): return x+y
def test_main():
test_support.run_unittest(TestCopy)
if __name__ == "__main__":
test_main()
|