Lib/test/test_sys.py

   1 # -*- coding: iso-8859-1 -*-
   2 import unittest, test.test_support
   3 import sys, cStringIO, os
   4 import struct
   5
   6 class SysModuleTest(unittest.TestCase):
   7
   8     def tearDown(self):
   9         test.test_support.reap_children()
  10
  11     def test_original_displayhook(self):
  12         import __builtin__
  13         savestdout = sys.stdout
  14         out = cStringIO.StringIO()
  15         sys.stdout = out
  16
  17         dh = sys.__displayhook__
  18
  19         self.assertRaises(TypeError, dh)
  20         if hasattr(__builtin__, "_"):
  21             del __builtin__._
  22
  23         dh(None)
  24         self.assertEqual(out.getvalue(), "")
  25         self.assertTrue(not hasattr(__builtin__, "_"))
  26         dh(42)
  27         self.assertEqual(out.getvalue(), "42\n")
  28         self.assertEqual(__builtin__._, 42)
  29
  30         del sys.stdout
  31         self.assertRaises(RuntimeError, dh, 42)
  32
  33         sys.stdout = savestdout
  34
  35     def test_lost_displayhook(self):
  36         olddisplayhook = sys.displayhook
  37         del sys.displayhook
  38         code = compile("42", "<string>", "single")
  39         self.assertRaises(RuntimeError, eval, code)
  40         sys.displayhook = olddisplayhook
  41
  42     def test_custom_displayhook(self):
  43         olddisplayhook = sys.displayhook
  44         def baddisplayhook(obj):
  45             raise ValueError
  46         sys.displayhook = baddisplayhook
  47         code = compile("42", "<string>", "single")
  48         self.assertRaises(ValueError, eval, code)
  49         sys.displayhook = olddisplayhook
  50
  51     def test_original_excepthook(self):
  52         savestderr = sys.stderr
  53         err = cStringIO.StringIO()
  54         sys.stderr = err
  55
  56         eh = sys.__excepthook__
  57
  58         self.assertRaises(TypeError, eh)
  59         try:
  60             raise ValueError(42)
  61         except ValueError, exc:
  62             eh(*sys.exc_info())
  63
  64         sys.stderr = savestderr
  65         self.assertTrue(err.getvalue().endswith("ValueError: 42\n"))
  66
  67     # FIXME: testing the code for a lost or replaced excepthook in
  68     # Python/pythonrun.c::PyErr_PrintEx() is tricky.
  69
  70     def test_exc_clear(self):
  71         self.assertRaises(TypeError, sys.exc_clear, 42)
  72
  73         # Verify that exc_info is present and matches exc, then clear it, and
  74         # check that it worked.
  75         def clear_check(exc):
  76             typ, value, traceback = sys.exc_info()
  77             self.assertTrue(typ is not None)
  78             self.assertTrue(value is exc)
  79             self.assertTrue(traceback is not None)
  80
  81             sys.exc_clear()
  82
  83             typ, value, traceback = sys.exc_info()
  84             self.assertTrue(typ is None)
  85             self.assertTrue(value is None)
  86             self.assertTrue(traceback is None)
  87
  88         def clear():
  89             try:
  90                 raise ValueError, 42
  91             except ValueError, exc:
  92                 clear_check(exc)
  93
  94         # Raise an exception and check that it can be cleared
  95         clear()
  96
  97         # Verify that a frame currently handling an exception is
  98         # unaffected by calling exc_clear in a nested frame.
  99         try:
 100             raise ValueError, 13
 101         except ValueError, exc:
 102             typ1, value1, traceback1 = sys.exc_info()
 103             clear()
 104             typ2, value2, traceback2 = sys.exc_info()
 105
 106             self.assertTrue(typ1 is typ2)
 107             self.assertTrue(value1 is exc)
 108             self.assertTrue(value1 is value2)
 109             self.assertTrue(traceback1 is traceback2)
 110
 111         # Check that an exception can be cleared outside of an except block
 112         clear_check(exc)
 113
 114     def test_exit(self):
 115         self.assertRaises(TypeError, sys.exit, 42, 42)
 116
 117         # call without argument
 118         try:
 119             sys.exit(0)
 120         except SystemExit, exc:
 121             self.assertEquals(exc.code, 0)
 122         except:
 123             self.fail("wrong exception")
 124         else:
 125             self.fail("no exception")
 126
 127         # call with tuple argument with one entry
 128         # entry will be unpacked
 129         try:
 130             sys.exit(42)
 131         except SystemExit, exc:
 132             self.assertEquals(exc.code, 42)
 133         except:
 134             self.fail("wrong exception")
 135         else:
 136             self.fail("no exception")
 137
 138         # call with integer argument
 139         try:
 140             sys.exit((42,))
 141         except SystemExit, exc:
 142             self.assertEquals(exc.code, 42)
 143         except:
 144             self.fail("wrong exception")
 145         else:
 146             self.fail("no exception")
 147
 148         # call with string argument
 149         try:
 150             sys.exit("exit")
 151         except SystemExit, exc:
 152             self.assertEquals(exc.code, "exit")
 153         except:
 154             self.fail("wrong exception")
 155         else:
 156             self.fail("no exception")
 157
 158         # call with tuple argument with two entries
 159         try:
 160             sys.exit((17, 23))
 161         except SystemExit, exc:
 162             self.assertEquals(exc.code, (17, 23))
 163         except:
 164             self.fail("wrong exception")
 165         else:
 166             self.fail("no exception")
 167
 168         # test that the exit machinery handles SystemExits properly
 169         import subprocess
 170         # both unnormalized...
 171         rc = subprocess.call([sys.executable, "-c",
 172                               "raise SystemExit, 46"])
 173         self.assertEqual(rc, 46)
 174         # ... and normalized
 175         rc = subprocess.call([sys.executable, "-c",
 176                               "raise SystemExit(47)"])
 177         self.assertEqual(rc, 47)
 178
 179
 180     def test_getdefaultencoding(self):
 181         if test.test_support.have_unicode:
 182             self.assertRaises(TypeError, sys.getdefaultencoding, 42)
 183             # can't check more than the type, as the user might have changed it
 184             self.assertTrue(isinstance(sys.getdefaultencoding(), str))
 185
 186     # testing sys.settrace() is done in test_trace.py
 187     # testing sys.setprofile() is done in test_profile.py
 188
 189     def test_setcheckinterval(self):
 190         self.assertRaises(TypeError, sys.setcheckinterval)
 191         orig = sys.getcheckinterval()
 192         for n in 0, 100, 120, orig: # orig last to restore starting state
 193             sys.setcheckinterval(n)
 194             self.assertEquals(sys.getcheckinterval(), n)
 195
 196     def test_recursionlimit(self):
 197         self.assertRaises(TypeError, sys.getrecursionlimit, 42)
 198         oldlimit = sys.getrecursionlimit()
 199         self.assertRaises(TypeError, sys.setrecursionlimit)
 200         self.assertRaises(ValueError, sys.setrecursionlimit, -42)
 201         sys.setrecursionlimit(10000)
 202         self.assertEqual(sys.getrecursionlimit(), 10000)
 203         sys.setrecursionlimit(oldlimit)
 204
 205     def test_getwindowsversion(self):
 206         if hasattr(sys, "getwindowsversion"):
 207             v = sys.getwindowsversion()
 208             self.assertTrue(isinstance(v, tuple))
 209             self.assertEqual(len(v), 5)
 210             self.assertTrue(isinstance(v[0], int))
 211             self.assertTrue(isinstance(v[1], int))
 212             self.assertTrue(isinstance(v[2], int))
 213             self.assertTrue(isinstance(v[3], int))
 214             self.assertTrue(isinstance(v[4], str))
 215
 216     def test_dlopenflags(self):
 217         if hasattr(sys, "setdlopenflags"):
 218             self.assertTrue(hasattr(sys, "getdlopenflags"))
 219             self.assertRaises(TypeError, sys.getdlopenflags, 42)
 220             oldflags = sys.getdlopenflags()
 221             self.assertRaises(TypeError, sys.setdlopenflags)
 222             sys.setdlopenflags(oldflags+1)
 223             self.assertEqual(sys.getdlopenflags(), oldflags+1)
 224             sys.setdlopenflags(oldflags)
 225
 226     def test_refcount(self):
 227         # n here must be a global in order for this test to pass while
 228         # tracing with a python function.  Tracing calls PyFrame_FastToLocals
 229         # which will add a copy of any locals to the frame object, causing
 230         # the reference count to increase by 2 instead of 1.
 231         global n
 232         self.assertRaises(TypeError, sys.getrefcount)
 233         c = sys.getrefcount(None)
 234         n = None
 235         self.assertEqual(sys.getrefcount(None), c+1)
 236         del n
 237         self.assertEqual(sys.getrefcount(None), c)
 238         if hasattr(sys, "gettotalrefcount"):
 239             self.assertTrue(isinstance(sys.gettotalrefcount(), int))
 240
 241     def test_getframe(self):
 242         self.assertRaises(TypeError, sys._getframe, 42, 42)
 243         self.assertRaises(ValueError, sys._getframe, 2000000000)
 244         self.assertTrue(
 245             SysModuleTest.test_getframe.im_func.func_code \
 246             is sys._getframe().f_code
 247         )
 248
 249     # sys._current_frames() is a CPython-only gimmick.
 250     def test_current_frames(self):
 251         have_threads = True
 252         try:
 253             import thread
 254         except ImportError:
 255             have_threads = False
 256
 257         if have_threads:
 258             self.current_frames_with_threads()
 259         else:
 260             self.current_frames_without_threads()
 261
 262     # Test sys._current_frames() in a WITH_THREADS build.
 263     @test.test_support.reap_threads
 264     def current_frames_with_threads(self):
 265         import threading, thread
 266         import traceback
 267
 268         # Spawn a thread that blocks at a known place.  Then the main
 269         # thread does sys._current_frames(), and verifies that the frames
 270         # returned make sense.
 271         entered_g = threading.Event()
 272         leave_g = threading.Event()
 273         thread_info = []  # the thread's id
 274
 275         def f123():
 276             g456()
 277
 278         def g456():
 279             thread_info.append(thread.get_ident())
 280             entered_g.set()
 281             leave_g.wait()
 282
 283         t = threading.Thread(target=f123)
 284         t.start()
 285         entered_g.wait()
 286
 287         # At this point, t has finished its entered_g.set(), although it's
 288         # impossible to guess whether it's still on that line or has moved on
 289         # to its leave_g.wait().
 290         self.assertEqual(len(thread_info), 1)
 291         thread_id = thread_info[0]
 292
 293         d = sys._current_frames()
 294
 295         main_id = thread.get_ident()
 296         self.assertTrue(main_id in d)
 297         self.assertTrue(thread_id in d)
 298
 299         # Verify that the captured main-thread frame is _this_ frame.
 300         frame = d.pop(main_id)
 301         self.assertTrue(frame is sys._getframe())
 302
 303         # Verify that the captured thread frame is blocked in g456, called
 304         # from f123.  This is a litte tricky, since various bits of
 305         # threading.py are also in the thread's call stack.
 306         frame = d.pop(thread_id)
 307         stack = traceback.extract_stack(frame)
 308         for i, (filename, lineno, funcname, sourceline) in enumerate(stack):
 309             if funcname == "f123":
 310                 break
 311         else:
 312             self.fail("didn't find f123() on thread's call stack")
 313
 314         self.assertEqual(sourceline, "g456()")
 315
 316         # And the next record must be for g456().
 317         filename, lineno, funcname, sourceline = stack[i+1]
 318         self.assertEqual(funcname, "g456")
 319         self.assertTrue(sourceline in ["leave_g.wait()", "entered_g.set()"])
 320
 321         # Reap the spawned thread.
 322         leave_g.set()
 323         t.join()
 324
 325     # Test sys._current_frames() when thread support doesn't exist.
 326     def current_frames_without_threads(self):
 327         # Not much happens here:  there is only one thread, with artificial
 328         # "thread id" 0.
 329         d = sys._current_frames()
 330         self.assertEqual(len(d), 1)
 331         self.assertTrue(0 in d)
 332         self.assertTrue(d[0] is sys._getframe())
 333
 334     def test_attributes(self):
 335         self.assertTrue(isinstance(sys.api_version, int))
 336         self.assertTrue(isinstance(sys.argv, list))
 337         self.assertTrue(sys.byteorder in ("little", "big"))
 338         self.assertTrue(isinstance(sys.builtin_module_names, tuple))
 339         self.assertTrue(isinstance(sys.copyright, basestring))
 340         self.assertTrue(isinstance(sys.exec_prefix, basestring))
 341         self.assertTrue(isinstance(sys.executable, basestring))
 342         self.assertEqual(len(sys.float_info), 11)
 343         self.assertEqual(sys.float_info.radix, 2)
 344         self.assertEqual(len(sys.long_info), 2)
 345         self.assertTrue(sys.long_info.bits_per_digit % 5 == 0)
 346         self.assertTrue(sys.long_info.sizeof_digit >= 1)
 347         self.assertEqual(type(sys.long_info.bits_per_digit), int)
 348         self.assertEqual(type(sys.long_info.sizeof_digit), int)
 349         self.assertTrue(isinstance(sys.hexversion, int))
 350         self.assertTrue(isinstance(sys.maxint, int))
 351         if test.test_support.have_unicode:
 352             self.assertTrue(isinstance(sys.maxunicode, int))
 353         self.assertTrue(isinstance(sys.platform, basestring))
 354         self.assertTrue(isinstance(sys.prefix, basestring))
 355         self.assertTrue(isinstance(sys.version, basestring))
 356         vi = sys.version_info
 357         self.assertTrue(isinstance(vi[:], tuple))
 358         self.assertEqual(len(vi), 5)
 359         self.assertTrue(isinstance(vi[0], int))
 360         self.assertTrue(isinstance(vi[1], int))
 361         self.assertTrue(isinstance(vi[2], int))
 362         self.assertTrue(vi[3] in ("alpha", "beta", "candidate", "final"))
 363         self.assertTrue(isinstance(vi[4], int))
 364         self.assertTrue(isinstance(vi.major, int))
 365         self.assertTrue(isinstance(vi.minor, int))
 366         self.assertTrue(isinstance(vi.micro, int))
 367         self.assertTrue(vi.releaselevel in
 368                      ("alpha", "beta", "candidate", "final"))
 369         self.assertTrue(isinstance(vi.serial, int))
 370         self.assertEqual(vi[0], vi.major)
 371         self.assertEqual(vi[1], vi.minor)
 372         self.assertEqual(vi[2], vi.micro)
 373         self.assertEqual(vi[3], vi.releaselevel)
 374         self.assertEqual(vi[4], vi.serial)
 375         self.assertTrue(vi > (1,0,0))
 376         self.assertIsInstance(sys.float_repr_style, str)
 377         self.assertTrue(sys.float_repr_style in ('short', 'legacy'))
 378
 379     def test_43581(self):
 380         # Can't use sys.stdout, as this is a cStringIO object when
 381         # the test runs under regrtest.
 382         self.assertTrue(sys.__stdout__.encoding == sys.__stderr__.encoding)
 383
 384     def test_sys_flags(self):
 385         self.assertTrue(sys.flags)
 386         attrs = ("debug", "py3k_warning", "division_warning", "division_new",
 387                  "inspect", "interactive", "optimize", "dont_write_bytecode",
 388                  "no_site", "ignore_environment", "tabcheck", "verbose",
 389                  "unicode", "bytes_warning")
 390         for attr in attrs:
 391             self.assertTrue(hasattr(sys.flags, attr), attr)
 392             self.assertEqual(type(getattr(sys.flags, attr)), int, attr)
 393         self.assertTrue(repr(sys.flags))
 394
 395     def test_clear_type_cache(self):
 396         sys._clear_type_cache()
 397
 398     def test_ioencoding(self):
 399         import subprocess,os
 400         env = dict(os.environ)
 401
 402         # Test character: cent sign, encoded as 0x4A (ASCII J) in CP424,
 403         # not representable in ASCII.
 404
 405         env["PYTHONIOENCODING"] = "cp424"
 406         p = subprocess.Popen([sys.executable, "-c", 'print unichr(0xa2)'],
 407                              stdout = subprocess.PIPE, env=env)
 408         out = p.communicate()[0].strip()
 409         self.assertEqual(out, unichr(0xa2).encode("cp424"))
 410
 411         env["PYTHONIOENCODING"] = "ascii:replace"
 412         p = subprocess.Popen([sys.executable, "-c", 'print unichr(0xa2)'],
 413                              stdout = subprocess.PIPE, env=env)
 414         out = p.communicate()[0].strip()
 415         self.assertEqual(out, '?')
 416
 417
 418 class SizeofTest(unittest.TestCase):
 419
 420     TPFLAGS_HAVE_GC = 1<<14
 421     TPFLAGS_HEAPTYPE = 1L<<9
 422
 423     def setUp(self):
 424         self.c = len(struct.pack('c', ' '))
 425         self.H = len(struct.pack('H', 0))
 426         self.i = len(struct.pack('i', 0))
 427         self.l = len(struct.pack('l', 0))
 428         self.P = len(struct.pack('P', 0))
 429         # due to missing size_t information from struct, it is assumed that
 430         # sizeof(Py_ssize_t) = sizeof(void*)
 431         self.header = 'PP'
 432         self.vheader = self.header + 'P'
 433         if hasattr(sys, "gettotalrefcount"):
 434             self.header += '2P'
 435             self.vheader += '2P'
 436         self.longdigit = sys.long_info.sizeof_digit
 437         import _testcapi
 438         self.gc_headsize = _testcapi.SIZEOF_PYGC_HEAD
 439         self.file = open(test.test_support.TESTFN, 'wb')
 440
 441     def tearDown(self):
 442         self.file.close()
 443         test.test_support.unlink(test.test_support.TESTFN)
 444
 445     def check_sizeof(self, o, size):
 446         result = sys.getsizeof(o)
 447         if ((type(o) == type) and (o.__flags__ & self.TPFLAGS_HEAPTYPE) or\
 448            ((type(o) != type) and (type(o).__flags__ & self.TPFLAGS_HAVE_GC))):
 449             size += self.gc_headsize
 450         msg = 'wrong size for %s: got %d, expected %d' \
 451                 % (type(o), result, size)
 452         self.assertEqual(result, size, msg)
 453
 454     def calcsize(self, fmt):
 455         """Wrapper around struct.calcsize which enforces the alignment of the
 456         end of a structure to the alignment requirement of pointer.
 457
 458         Note: This wrapper should only be used if a pointer member is included
 459         and no member with a size larger than a pointer exists.
 460         """
 461         return struct.calcsize(fmt + '0P')
 462
 463     def test_gc_head_size(self):
 464         # Check that the gc header size is added to objects tracked by the gc.
 465         h = self.header
 466         size = self.calcsize
 467         gc_header_size = self.gc_headsize
 468         # bool objects are not gc tracked
 469         self.assertEqual(sys.getsizeof(True), size(h + 'l'))
 470         # but lists are
 471         self.assertEqual(sys.getsizeof([]), size(h + 'P PP') + gc_header_size)
 472
 473     def test_default(self):
 474         h = self.header
 475         size = self.calcsize
 476         self.assertEqual(sys.getsizeof(True, -1), size(h + 'l'))
 477
 478     def test_objecttypes(self):
 479         # check all types defined in Objects/
 480         h = self.header
 481         vh = self.vheader
 482         size = self.calcsize
 483         check = self.check_sizeof
 484         # bool
 485         check(True, size(h + 'l'))
 486         # buffer
 487         check(buffer(''), size(h + '2P2Pil'))
 488         # builtin_function_or_method
 489         check(len, size(h + '3P'))
 490         # bytearray
 491         samples = ['', 'u'*100000]
 492         for sample in samples:
 493             x = bytearray(sample)
 494             check(x, size(vh + 'iPP') + x.__alloc__() * self.c)
 495         # bytearray_iterator
 496         check(iter(bytearray()), size(h + 'PP'))
 497         # cell
 498         def get_cell():
 499             x = 42
 500             def inner():
 501                 return x
 502             return inner
 503         check(get_cell().func_closure[0], size(h + 'P'))
 504         # classobj (old-style class)
 505         class class_oldstyle():
 506             def method():
 507                 pass
 508         check(class_oldstyle, size(h + '6P'))
 509         # instance (old-style class)
 510         check(class_oldstyle(), size(h + '3P'))
 511         # instancemethod (old-style class)
 512         check(class_oldstyle().method, size(h + '4P'))
 513         # complex
 514         check(complex(0,1), size(h + '2d'))
 515         # code
 516         check(get_cell().func_code, size(h + '4i8Pi2P'))
 517         # BaseException
 518         check(BaseException(), size(h + '3P'))
 519         # UnicodeEncodeError
 520         check(UnicodeEncodeError("", u"", 0, 0, ""), size(h + '5P2PP'))
 521         # UnicodeDecodeError
 522         check(UnicodeDecodeError("", "", 0, 0, ""), size(h + '5P2PP'))
 523         # UnicodeTranslateError
 524         check(UnicodeTranslateError(u"", 0, 1, ""), size(h + '5P2PP'))
 525         # method_descriptor (descriptor object)
 526         check(str.lower, size(h + '2PP'))
 527         # classmethod_descriptor (descriptor object)
 528         # XXX
 529         # member_descriptor (descriptor object)
 530         import datetime
 531         check(datetime.timedelta.days, size(h + '2PP'))
 532         # getset_descriptor (descriptor object)
 533         import __builtin__
 534         check(__builtin__.file.closed, size(h + '2PP'))
 535         # wrapper_descriptor (descriptor object)
 536         check(int.__add__, size(h + '2P2P'))
 537         # dictproxy
 538         class C(object): pass
 539         check(C.__dict__, size(h + 'P'))
 540         # method-wrapper (descriptor object)
 541         check({}.__iter__, size(h + '2P'))
 542         # dict
 543         check({}, size(h + '3P2P' + 8*'P2P'))
 544         x = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}
 545         check(x, size(h + '3P2P' + 8*'P2P') + 16*size('P2P'))
 546         # dictionary-keyiterator
 547         check({}.iterkeys(), size(h + 'P2PPP'))
 548         # dictionary-valueiterator
 549         check({}.itervalues(), size(h + 'P2PPP'))
 550         # dictionary-itemiterator
 551         check({}.iteritems(), size(h + 'P2PPP'))
 552         # ellipses
 553         check(Ellipsis, size(h + ''))
 554         # EncodingMap
 555         import codecs, encodings.iso8859_3
 556         x = codecs.charmap_build(encodings.iso8859_3.decoding_table)
 557         check(x, size(h + '32B2iB'))
 558         # enumerate
 559         check(enumerate([]), size(h + 'l3P'))
 560         # file
 561         check(self.file, size(h + '4P2i4P3i3Pi'))
 562         # float
 563         check(float(0), size(h + 'd'))
 564         # sys.floatinfo
 565         check(sys.float_info, size(vh) + self.P * len(sys.float_info))
 566         # frame
 567         import inspect
 568         CO_MAXBLOCKS = 20
 569         x = inspect.currentframe()
 570         ncells = len(x.f_code.co_cellvars)
 571         nfrees = len(x.f_code.co_freevars)
 572         extras = x.f_code.co_stacksize + x.f_code.co_nlocals +\
 573                  ncells + nfrees - 1
 574         check(x, size(vh + '12P3i' + CO_MAXBLOCKS*'3i' + 'P' + extras*'P'))
 575         # function
 576         def func(): pass
 577         check(func, size(h + '9P'))
 578         class c():
 579             @staticmethod
 580             def foo():
 581                 pass
 582             @classmethod
 583             def bar(cls):
 584                 pass
 585             # staticmethod
 586             check(foo, size(h + 'P'))
 587             # classmethod
 588             check(bar, size(h + 'P'))
 589         # generator
 590         def get_gen(): yield 1
 591         check(get_gen(), size(h + 'Pi2P'))
 592         # integer
 593         check(1, size(h + 'l'))
 594         check(100, size(h + 'l'))
 595         # iterator
 596         check(iter('abc'), size(h + 'lP'))
 597         # callable-iterator
 598         import re
 599         check(re.finditer('',''), size(h + '2P'))
 600         # list
 601         samples = [[], [1,2,3], ['1', '2', '3']]
 602         for sample in samples:
 603             check(sample, size(vh + 'PP') + len(sample)*self.P)
 604         # sortwrapper (list)
 605         # XXX
 606         # cmpwrapper (list)
 607         # XXX
 608         # listiterator (list)
 609         check(iter([]), size(h + 'lP'))
 610         # listreverseiterator (list)
 611         check(reversed([]), size(h + 'lP'))
 612         # long
 613         check(0L, size(vh))
 614         check(1L, size(vh) + self.longdigit)
 615         check(-1L, size(vh) + self.longdigit)
 616         PyLong_BASE = 2**sys.long_info.bits_per_digit
 617         check(long(PyLong_BASE), size(vh) + 2*self.longdigit)
 618         check(long(PyLong_BASE**2-1), size(vh) + 2*self.longdigit)
 619         check(long(PyLong_BASE**2), size(vh) + 3*self.longdigit)
 620         # module
 621         check(unittest, size(h + 'P'))
 622         # None
 623         check(None, size(h + ''))
 624         # object
 625         check(object(), size(h + ''))
 626         # property (descriptor object)
 627         class C(object):
 628             def getx(self): return self.__x
 629             def setx(self, value): self.__x = value
 630             def delx(self): del self.__x
 631             x = property(getx, setx, delx, "")
 632             check(x, size(h + '4Pi'))
 633         # PyCObject
 634         # XXX
 635         # rangeiterator
 636         check(iter(xrange(1)), size(h + '4l'))
 637         # reverse
 638         check(reversed(''), size(h + 'PP'))
 639         # set
 640         # frozenset
 641         PySet_MINSIZE = 8
 642         samples = [[], range(10), range(50)]
 643         s = size(h + '3P2P' + PySet_MINSIZE*'lP' + 'lP')
 644         for sample in samples:
 645             minused = len(sample)
 646             if minused == 0: tmp = 1
 647             # the computation of minused is actually a bit more complicated
 648             # but this suffices for the sizeof test
 649             minused = minused*2
 650             newsize = PySet_MINSIZE
 651             while newsize <= minused:
 652                 newsize = newsize << 1
 653             if newsize <= 8:
 654                 check(set(sample), s)
 655                 check(frozenset(sample), s)
 656             else:
 657                 check(set(sample), s + newsize*struct.calcsize('lP'))
 658                 check(frozenset(sample), s + newsize*struct.calcsize('lP'))
 659         # setiterator
 660         check(iter(set()), size(h + 'P3P'))
 661         # slice
 662         check(slice(1), size(h + '3P'))
 663         # str
 664         check('', struct.calcsize(vh + 'li') + 1)
 665         check('abc', struct.calcsize(vh + 'li') + 1 + 3*self.c)
 666         # super
 667         check(super(int), size(h + '3P'))
 668         # tuple
 669         check((), size(vh))
 670         check((1,2,3), size(vh) + 3*self.P)
 671         # tupleiterator
 672         check(iter(()), size(h + 'lP'))
 673         # type
 674         # (PyTypeObject + PyNumberMethods +  PyMappingMethods +
 675         #  PySequenceMethods + PyBufferProcs)
 676         s = size(vh + 'P2P15Pl4PP9PP11PI') + size('41P 10P 3P 6P')
 677         class newstyleclass(object):
 678             pass
 679         check(newstyleclass, s)
 680         # builtin type
 681         check(int, s)
 682         # NotImplementedType
 683         import types
 684         check(types.NotImplementedType, s)
 685         # unicode
 686         usize = len(u'\0'.encode('unicode-internal'))
 687         samples = [u'', u'1'*100]
 688         # we need to test for both sizes, because we don't know if the string
 689         # has been cached
 690         for s in samples:
 691             check(s, size(h + 'PPlP') + usize * (len(s) + 1))
 692         # weakref
 693         import weakref
 694         check(weakref.ref(int), size(h + '2Pl2P'))
 695         # weakproxy
 696         # XXX
 697         # weakcallableproxy
 698         check(weakref.proxy(int), size(h + '2Pl2P'))
 699         # xrange
 700         check(xrange(1), size(h + '3l'))
 701         check(xrange(66000), size(h + '3l'))
 702
 703     def test_pythontypes(self):
 704         # check all types defined in Python/
 705         h = self.header
 706         vh = self.vheader
 707         size = self.calcsize
 708         check = self.check_sizeof
 709         # _ast.AST
 710         import _ast
 711         check(_ast.AST(), size(h + ''))
 712         # imp.NullImporter
 713         import imp
 714         check(imp.NullImporter(self.file.name), size(h + ''))
 715         try:
 716             raise TypeError
 717         except TypeError:
 718             tb = sys.exc_info()[2]
 719             # traceback
 720             if tb != None:
 721                 check(tb, size(h + '2P2i'))
 722         # symtable entry
 723         # XXX
 724         # sys.flags
 725         check(sys.flags, size(vh) + self.P * len(sys.flags))
 726
 727
 728 def test_main():
 729     test_classes = (SysModuleTest, SizeofTest)
 730
 731     test.test_support.run_unittest(*test_classes)
 732
 733 if __name__ == "__main__":
 734     test_main()