1 from test import support 2 import array 3 import io 4 import marshal 5 import sys 6 import unittest 7 import os 8 import types 9 10 try: 11 import _testcapi 12 except ImportError: 13 _testcapi = None 14 15 class HelperMixin: 16 def helper(self, sample, *extra): 17 new = marshal.loads(marshal.dumps(sample, *extra)) 18 self.assertEqual(sample, new) 19 try: 20 with open(support.TESTFN, "wb") as f: 21 marshal.dump(sample, f, *extra) 22 with open(support.TESTFN, "rb") as f: 23 new = marshal.load(f) 24 self.assertEqual(sample, new) 25 finally: 26 support.unlink(support.TESTFN) 27 28 class IntTestCase(unittest.TestCase, HelperMixin): 29 def test_ints(self): 30 # Test a range of Python ints larger than the machine word size. 31 n = sys.maxsize ** 2 32 while n: 33 for expected in (-n, n): 34 self.helper(expected) 35 n = n >> 1 36 37 def test_bool(self): 38 for b in (True, False): 39 self.helper(b) 40 41 class FloatTestCase(unittest.TestCase, HelperMixin): 42 def test_floats(self): 43 # Test a few floats 44 small = 1e-25 45 n = sys.maxsize * 3.7e250 46 while n > small: 47 for expected in (-n, n): 48 self.helper(float(expected)) 49 n /= 123.4567 50 51 f = 0.0 52 s = marshal.dumps(f, 2) 53 got = marshal.loads(s) 54 self.assertEqual(f, got) 55 # and with version <= 1 (floats marshalled differently then) 56 s = marshal.dumps(f, 1) 57 got = marshal.loads(s) 58 self.assertEqual(f, got) 59 60 n = sys.maxsize * 3.7e-250 61 while n < small: 62 for expected in (-n, n): 63 f = float(expected) 64 self.helper(f) 65 self.helper(f, 1) 66 n *= 123.4567 67 68 class StringTestCase(unittest.TestCase, HelperMixin): 69 def test_unicode(self): 70 for s in ["", "Andr\xe8 Previn", "abc", " "*10000]: 71 self.helper(marshal.loads(marshal.dumps(s))) 72 73 def test_string(self): 74 for s in ["", "Andr\xe8 Previn", "abc", " "*10000]: 75 self.helper(s) 76 77 def test_bytes(self): 78 for s in [b"", b"Andr\xe8 Previn", b"abc", b" "*10000]: 79 self.helper(s) 80 81 class ExceptionTestCase(unittest.TestCase): 82 def test_exceptions(self): 83 new = marshal.loads(marshal.dumps(StopIteration)) 84 self.assertEqual(StopIteration, new) 85 86 class CodeTestCase(unittest.TestCase): 87 def test_code(self): 88 co = ExceptionTestCase.test_exceptions.__code__ 89 new = marshal.loads(marshal.dumps(co)) 90 self.assertEqual(co, new) 91 92 def test_many_codeobjects(self): 93 # Issue2957: bad recursion count on code objects 94 count = 5000 # more than MAX_MARSHAL_STACK_DEPTH 95 codes = (ExceptionTestCase.test_exceptions.__code__,) * count 96 marshal.loads(marshal.dumps(codes)) 97 98 def test_different_filenames(self): 99 co1 = compile("x", "f1", "exec") 100 co2 = compile("y", "f2", "exec") 101 co1, co2 = marshal.loads(marshal.dumps((co1, co2))) 102 self.assertEqual(co1.co_filename, "f1") 103 self.assertEqual(co2.co_filename, "f2") 104 105 @support.cpython_only 106 def test_same_filename_used(self): 107 s = """def f(): pass\ndef g(): pass""" 108 co = compile(s, "myfile", "exec") 109 co = marshal.loads(marshal.dumps(co)) 110 for obj in co.co_consts: 111 if isinstance(obj, types.CodeType): 112 self.assertIs(co.co_filename, obj.co_filename) 113 114 class ContainerTestCase(unittest.TestCase, HelperMixin): 115 d = {'astring': 'foo (at] bar.baz.spam', 116 'afloat': 7283.43, 117 'anint': 2**20, 118 'ashortlong': 2, 119 'alist': ['.zyx.41'], 120 'atuple': ('.zyx.41',)*10, 121 'aboolean': False, 122 'aunicode': "Andr\xe8 Previn" 123 } 124 125 def test_dict(self): 126 self.helper(self.d) 127 128 def test_list(self): 129 self.helper(list(self.d.items())) 130 131 def test_tuple(self): 132 self.helper(tuple(self.d.keys())) 133 134 def test_sets(self): 135 for constructor in (set, frozenset): 136 self.helper(constructor(self.d.keys())) 137 138 @support.cpython_only 139 def test_empty_frozenset_singleton(self): 140 # marshal.loads() must reuse the empty frozenset singleton 141 obj = frozenset() 142 obj2 = marshal.loads(marshal.dumps(obj)) 143 self.assertIs(obj2, obj) 144 145 146 class BufferTestCase(unittest.TestCase, HelperMixin): 147 148 def test_bytearray(self): 149 b = bytearray(b"abc") 150 self.helper(b) 151 new = marshal.loads(marshal.dumps(b)) 152 self.assertEqual(type(new), bytes) 153 154 def test_memoryview(self): 155 b = memoryview(b"abc") 156 self.helper(b) 157 new = marshal.loads(marshal.dumps(b)) 158 self.assertEqual(type(new), bytes) 159 160 def test_array(self): 161 a = array.array('B', b"abc") 162 new = marshal.loads(marshal.dumps(a)) 163 self.assertEqual(new, b"abc") 164 165 166 class BugsTestCase(unittest.TestCase): 167 def test_bug_5888452(self): 168 # Simple-minded check for SF 588452: Debug build crashes 169 marshal.dumps([128] * 1000) 170 171 def test_patch_873224(self): 172 self.assertRaises(Exception, marshal.loads, '0') 173 self.assertRaises(Exception, marshal.loads, 'f') 174 self.assertRaises(Exception, marshal.loads, marshal.dumps(2**65)[:-1]) 175 176 def test_version_argument(self): 177 # Python 2.4.0 crashes for any call to marshal.dumps(x, y) 178 self.assertEqual(marshal.loads(marshal.dumps(5, 0)), 5) 179 self.assertEqual(marshal.loads(marshal.dumps(5, 1)), 5) 180 181 def test_fuzz(self): 182 # simple test that it's at least not *totally* trivial to 183 # crash from bad marshal data 184 for c in [chr(i) for i in range(256)]: 185 try: 186 marshal.loads(c) 187 except Exception: 188 pass 189 190 def test_loads_2x_code(self): 191 s = b'c' + (b'X' * 4*4) + b'{' * 2**20 192 self.assertRaises(ValueError, marshal.loads, s) 193 194 def test_loads_recursion(self): 195 s = b'c' + (b'X' * 4*5) + b'{' * 2**20 196 self.assertRaises(ValueError, marshal.loads, s) 197 198 def test_recursion_limit(self): 199 # Create a deeply nested structure. 200 head = last = [] 201 # The max stack depth should match the value in Python/marshal.c. 202 if os.name == 'nt' and hasattr(sys, 'gettotalrefcount'): 203 MAX_MARSHAL_STACK_DEPTH = 1000 204 else: 205 MAX_MARSHAL_STACK_DEPTH = 2000 206 for i in range(MAX_MARSHAL_STACK_DEPTH - 2): 207 last.append([0]) 208 last = last[-1] 209 210 # Verify we don't blow out the stack with dumps/load. 211 data = marshal.dumps(head) 212 new_head = marshal.loads(data) 213 # Don't use == to compare objects, it can exceed the recursion limit. 214 self.assertEqual(len(new_head), len(head)) 215 self.assertEqual(len(new_head[0]), len(head[0])) 216 self.assertEqual(len(new_head[-1]), len(head[-1])) 217 218 last.append([0]) 219 self.assertRaises(ValueError, marshal.dumps, head) 220 221 def test_exact_type_match(self): 222 # Former bug: 223 # >>> class Int(int): pass 224 # >>> type(loads(dumps(Int()))) 225 # <type 'int'> 226 for typ in (int, float, complex, tuple, list, dict, set, frozenset): 227 # Note: str subclasses are not tested because they get handled 228 # by marshal's routines for objects supporting the buffer API. 229 subtyp = type('subtyp', (typ,), {}) 230 self.assertRaises(ValueError, marshal.dumps, subtyp()) 231 232 # Issue #1792 introduced a change in how marshal increases the size of its 233 # internal buffer; this test ensures that the new code is exercised. 234 def test_large_marshal(self): 235 size = int(1e6) 236 testString = 'abc' * size 237 marshal.dumps(testString) 238 239 def test_invalid_longs(self): 240 # Issue #7019: marshal.loads shouldn't produce unnormalized PyLongs 241 invalid_string = b'l\x02\x00\x00\x00\x00\x00\x00\x00' 242 self.assertRaises(ValueError, marshal.loads, invalid_string) 243 244 def test_multiple_dumps_and_loads(self): 245 # Issue 12291: marshal.load() should be callable multiple times 246 # with interleaved data written by non-marshal code 247 # Adapted from a patch by Engelbert Gruber. 248 data = (1, 'abc', b'def', 1.0, (2, 'a', ['b', b'c'])) 249 for interleaved in (b'', b'0123'): 250 ilen = len(interleaved) 251 positions = [] 252 try: 253 with open(support.TESTFN, 'wb') as f: 254 for d in data: 255 marshal.dump(d, f) 256 if ilen: 257 f.write(interleaved) 258 positions.append(f.tell()) 259 with open(support.TESTFN, 'rb') as f: 260 for i, d in enumerate(data): 261 self.assertEqual(d, marshal.load(f)) 262 if ilen: 263 f.read(ilen) 264 self.assertEqual(positions[i], f.tell()) 265 finally: 266 support.unlink(support.TESTFN) 267 268 def test_loads_reject_unicode_strings(self): 269 # Issue #14177: marshal.loads() should not accept unicode strings 270 unicode_string = 'T' 271 self.assertRaises(TypeError, marshal.loads, unicode_string) 272 273 def test_bad_reader(self): 274 class BadReader(io.BytesIO): 275 def readinto(self, buf): 276 n = super().readinto(buf) 277 if n is not None and n > 4: 278 n += 10**6 279 return n 280 for value in (1.0, 1j, b'0123456789', '0123456789'): 281 self.assertRaises(ValueError, marshal.load, 282 BadReader(marshal.dumps(value))) 283 284 def _test_eof(self): 285 data = marshal.dumps(("hello", "dolly", None)) 286 for i in range(len(data)): 287 self.assertRaises(EOFError, marshal.loads, data[0: i]) 288 289 LARGE_SIZE = 2**31 290 pointer_size = 8 if sys.maxsize > 0xFFFFFFFF else 4 291 292 class NullWriter: 293 def write(self, s): 294 pass 295 296 @unittest.skipIf(LARGE_SIZE > sys.maxsize, "test cannot run on 32-bit systems") 297 class LargeValuesTestCase(unittest.TestCase): 298 def check_unmarshallable(self, data): 299 self.assertRaises(ValueError, marshal.dump, data, NullWriter()) 300 301 @support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False) 302 def test_bytes(self, size): 303 self.check_unmarshallable(b'x' * size) 304 305 @support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False) 306 def test_str(self, size): 307 self.check_unmarshallable('x' * size) 308 309 @support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size + 1, dry_run=False) 310 def test_tuple(self, size): 311 self.check_unmarshallable((None,) * size) 312 313 @support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size + 1, dry_run=False) 314 def test_list(self, size): 315 self.check_unmarshallable([None] * size) 316 317 @support.bigmemtest(size=LARGE_SIZE, 318 memuse=pointer_size*12 + sys.getsizeof(LARGE_SIZE-1), 319 dry_run=False) 320 def test_set(self, size): 321 self.check_unmarshallable(set(range(size))) 322 323 @support.bigmemtest(size=LARGE_SIZE, 324 memuse=pointer_size*12 + sys.getsizeof(LARGE_SIZE-1), 325 dry_run=False) 326 def test_frozenset(self, size): 327 self.check_unmarshallable(frozenset(range(size))) 328 329 @support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False) 330 def test_bytearray(self, size): 331 self.check_unmarshallable(bytearray(size)) 332 333 def CollectObjectIDs(ids, obj): 334 """Collect object ids seen in a structure""" 335 if id(obj) in ids: 336 return 337 ids.add(id(obj)) 338 if isinstance(obj, (list, tuple, set, frozenset)): 339 for e in obj: 340 CollectObjectIDs(ids, e) 341 elif isinstance(obj, dict): 342 for k, v in obj.items(): 343 CollectObjectIDs(ids, k) 344 CollectObjectIDs(ids, v) 345 return len(ids) 346 347 class InstancingTestCase(unittest.TestCase, HelperMixin): 348 intobj = 123321 349 floatobj = 1.2345 350 strobj = "abcde"*3 351 dictobj = {"hello":floatobj, "goodbye":floatobj, floatobj:"hello"} 352 353 def helper3(self, rsample, recursive=False, simple=False): 354 #we have two instances 355 sample = (rsample, rsample) 356 357 n0 = CollectObjectIDs(set(), sample) 358 359 s3 = marshal.dumps(sample, 3) 360 n3 = CollectObjectIDs(set(), marshal.loads(s3)) 361 362 #same number of instances generated 363 self.assertEqual(n3, n0) 364 365 if not recursive: 366 #can compare with version 2 367 s2 = marshal.dumps(sample, 2) 368 n2 = CollectObjectIDs(set(), marshal.loads(s2)) 369 #old format generated more instances 370 self.assertGreater(n2, n0) 371 372 #if complex objects are in there, old format is larger 373 if not simple: 374 self.assertGreater(len(s2), len(s3)) 375 else: 376 self.assertGreaterEqual(len(s2), len(s3)) 377 378 def testInt(self): 379 self.helper(self.intobj) 380 self.helper3(self.intobj, simple=True) 381 382 def testFloat(self): 383 self.helper(self.floatobj) 384 self.helper3(self.floatobj) 385 386 def testStr(self): 387 self.helper(self.strobj) 388 self.helper3(self.strobj) 389 390 def testDict(self): 391 self.helper(self.dictobj) 392 self.helper3(self.dictobj) 393 394 def testModule(self): 395 with open(__file__, "rb") as f: 396 code = f.read() 397 if __file__.endswith(".py"): 398 code = compile(code, __file__, "exec") 399 self.helper(code) 400 self.helper3(code) 401 402 def testRecursion(self): 403 d = dict(self.dictobj) 404 d["self"] = d 405 self.helper3(d, recursive=True) 406 l = [self.dictobj] 407 l.append(l) 408 self.helper3(l, recursive=True) 409 410 class CompatibilityTestCase(unittest.TestCase): 411 def _test(self, version): 412 with open(__file__, "rb") as f: 413 code = f.read() 414 if __file__.endswith(".py"): 415 code = compile(code, __file__, "exec") 416 data = marshal.dumps(code, version) 417 marshal.loads(data) 418 419 def test0To3(self): 420 self._test(0) 421 422 def test1To3(self): 423 self._test(1) 424 425 def test2To3(self): 426 self._test(2) 427 428 def test3To3(self): 429 self._test(3) 430 431 class InterningTestCase(unittest.TestCase, HelperMixin): 432 strobj = "this is an interned string" 433 strobj = sys.intern(strobj) 434 435 def testIntern(self): 436 s = marshal.loads(marshal.dumps(self.strobj)) 437 self.assertEqual(s, self.strobj) 438 self.assertEqual(id(s), id(self.strobj)) 439 s2 = sys.intern(s) 440 self.assertEqual(id(s2), id(s)) 441 442 def testNoIntern(self): 443 s = marshal.loads(marshal.dumps(self.strobj, 2)) 444 self.assertEqual(s, self.strobj) 445 self.assertNotEqual(id(s), id(self.strobj)) 446 s2 = sys.intern(s) 447 self.assertNotEqual(id(s2), id(s)) 448 449 @support.cpython_only 450 @unittest.skipUnless(_testcapi, 'requires _testcapi') 451 class CAPI_TestCase(unittest.TestCase, HelperMixin): 452 453 def test_write_long_to_file(self): 454 for v in range(marshal.version + 1): 455 _testcapi.pymarshal_write_long_to_file(0x12345678, support.TESTFN, v) 456 with open(support.TESTFN, 'rb') as f: 457 data = f.read() 458 support.unlink(support.TESTFN) 459 self.assertEqual(data, b'\x78\x56\x34\x12') 460 461 def test_write_object_to_file(self): 462 obj = ('\u20ac', b'abc', 123, 45.6, 7+8j, 'long line '*1000) 463 for v in range(marshal.version + 1): 464 _testcapi.pymarshal_write_object_to_file(obj, support.TESTFN, v) 465 with open(support.TESTFN, 'rb') as f: 466 data = f.read() 467 support.unlink(support.TESTFN) 468 self.assertEqual(marshal.loads(data), obj) 469 470 def test_read_short_from_file(self): 471 with open(support.TESTFN, 'wb') as f: 472 f.write(b'\x34\x12xxxx') 473 r, p = _testcapi.pymarshal_read_short_from_file(support.TESTFN) 474 support.unlink(support.TESTFN) 475 self.assertEqual(r, 0x1234) 476 self.assertEqual(p, 2) 477 478 with open(support.TESTFN, 'wb') as f: 479 f.write(b'\x12') 480 with self.assertRaises(EOFError): 481 _testcapi.pymarshal_read_short_from_file(support.TESTFN) 482 support.unlink(support.TESTFN) 483 484 def test_read_long_from_file(self): 485 with open(support.TESTFN, 'wb') as f: 486 f.write(b'\x78\x56\x34\x12xxxx') 487 r, p = _testcapi.pymarshal_read_long_from_file(support.TESTFN) 488 support.unlink(support.TESTFN) 489 self.assertEqual(r, 0x12345678) 490 self.assertEqual(p, 4) 491 492 with open(support.TESTFN, 'wb') as f: 493 f.write(b'\x56\x34\x12') 494 with self.assertRaises(EOFError): 495 _testcapi.pymarshal_read_long_from_file(support.TESTFN) 496 support.unlink(support.TESTFN) 497 498 def test_read_last_object_from_file(self): 499 obj = ('\u20ac', b'abc', 123, 45.6, 7+8j) 500 for v in range(marshal.version + 1): 501 data = marshal.dumps(obj, v) 502 with open(support.TESTFN, 'wb') as f: 503 f.write(data + b'xxxx') 504 r, p = _testcapi.pymarshal_read_last_object_from_file(support.TESTFN) 505 support.unlink(support.TESTFN) 506 self.assertEqual(r, obj) 507 508 with open(support.TESTFN, 'wb') as f: 509 f.write(data[:1]) 510 with self.assertRaises(EOFError): 511 _testcapi.pymarshal_read_last_object_from_file(support.TESTFN) 512 support.unlink(support.TESTFN) 513 514 def test_read_object_from_file(self): 515 obj = ('\u20ac', b'abc', 123, 45.6, 7+8j) 516 for v in range(marshal.version + 1): 517 data = marshal.dumps(obj, v) 518 with open(support.TESTFN, 'wb') as f: 519 f.write(data + b'xxxx') 520 r, p = _testcapi.pymarshal_read_object_from_file(support.TESTFN) 521 support.unlink(support.TESTFN) 522 self.assertEqual(r, obj) 523 self.assertEqual(p, len(data)) 524 525 with open(support.TESTFN, 'wb') as f: 526 f.write(data[:1]) 527 with self.assertRaises(EOFError): 528 _testcapi.pymarshal_read_object_from_file(support.TESTFN) 529 support.unlink(support.TESTFN) 530 531 532 if __name__ == "__main__": 533 unittest.main() 534
