AppPkg/Applications/Python/Python-2.7.2/Lib/test/test_bz2.py

   1 #!/usr/bin/env python
   2 from test import test_support
   3 from test.test_support import TESTFN, import_module
   4
   5 import unittest
   6 from cStringIO import StringIO
   7 import os
   8 import subprocess
   9 import sys
  10
  11 try:
  12     import threading
  13 except ImportError:
  14     threading = None
  15
  16 bz2 = import_module('bz2')
  17 from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor
  18
  19 has_cmdline_bunzip2 = sys.platform not in ("win32", "os2emx", "riscos")
  20
  21 class BaseTest(unittest.TestCase):
  22     "Base for other testcases."
  23     TEXT = 'root:x:0:0:root:/root:/bin/bash\nbin:x:1:1:bin:/bin:\ndaemon:x:2:2:daemon:/sbin:\nadm:x:3:4:adm:/var/adm:\nlp:x:4:7:lp:/var/spool/lpd:\nsync:x:5:0:sync:/sbin:/bin/sync\nshutdown:x:6:0:shutdown:/sbin:/sbin/shutdown\nhalt:x:7:0:halt:/sbin:/sbin/halt\nmail:x:8:12:mail:/var/spool/mail:\nnews:x:9:13:news:/var/spool/news:\nuucp:x:10:14:uucp:/var/spool/uucp:\noperator:x:11:0:operator:/root:\ngames:x:12:100:games:/usr/games:\ngopher:x:13:30:gopher:/usr/lib/gopher-data:\nftp:x:14:50:FTP User:/var/ftp:/bin/bash\nnobody:x:65534:65534:Nobody:/home:\npostfix:x:100:101:postfix:/var/spool/postfix:\nniemeyer:x:500:500::/home/niemeyer:/bin/bash\npostgres:x:101:102:PostgreSQL Server:/var/lib/pgsql:/bin/bash\nmysql:x:102:103:MySQL server:/var/lib/mysql:/bin/bash\nwww:x:103:104::/var/www:/bin/false\n'
  24     DATA = 'BZh91AY&SY.\xc8N\x18\x00\x01>_\x80\x00\x10@\x02\xff\xf0\x01\x07n\x00?\xe7\xff\xe00\x01\x99\xaa\x00\xc0\x03F\x86\x8c#&\x83F\x9a\x03\x06\xa6\xd0\xa6\x93M\x0fQ\xa7\xa8\x06\x804hh\x12$\x11\xa4i4\xf14S\xd2<Q\xb5\x0fH\xd3\xd4\xdd\xd5\x87\xbb\xf8\x94\r\x8f\xafI\x12\xe1\xc9\xf8/E\x00pu\x89\x12]\xc9\xbbDL\nQ\x0e\t1\x12\xdf\xa0\xc0\x97\xac2O9\x89\x13\x94\x0e\x1c7\x0ed\x95I\x0c\xaaJ\xa4\x18L\x10\x05#\x9c\xaf\xba\xbc/\x97\x8a#C\xc8\xe1\x8cW\xf9\xe2\xd0\xd6M\xa7\x8bXa<e\x84t\xcbL\xb3\xa7\xd9\xcd\xd1\xcb\x84.\xaf\xb3\xab\xab\xad`n}\xa0lh\tE,\x8eZ\x15\x17VH>\x88\xe5\xcd9gd6\x0b\n\xe9\x9b\xd5\x8a\x99\xf7\x08.K\x8ev\xfb\xf7xw\xbb\xdf\xa1\x92\xf1\xdd|/";\xa2\xba\x9f\xd5\xb1#A\xb6\xf6\xb3o\xc9\xc5y\\\xebO\xe7\x85\x9a\xbc\xb6f8\x952\xd5\xd7"%\x89>V,\xf7\xa6z\xe2\x9f\xa3\xdf\x11\x11"\xd6E)I\xa9\x13^\xca\xf3r\xd0\x03U\x922\xf26\xec\xb6\xed\x8b\xc3U\x13\x9d\xc5\x170\xa4\xfa^\x92\xacDF\x8a\x97\xd6\x19\xfe\xdd\xb8\xbd\x1a\x9a\x19\xa3\x80ankR\x8b\xe5\xd83]\xa9\xc6\x08\x82f\xf6\xb9"6l$\xb8j@\xc0\x8a\xb0l1..\xbak\x83ls\x15\xbc\xf4\xc1\x13\xbe\xf8E\xb8\x9d\r\xa8\x9dk\x84\xd3n\xfa\xacQ\x07\xb1%y\xaav\xb4\x08\xe0z\x1b\x16\xf5\x04\xe9\xcc\xb9\x08z\x1en7.G\xfc]\xc9\x14\xe1B@\xbb!8`'
  25     DATA_CRLF = 'BZh91AY&SY\xaez\xbbN\x00\x01H\xdf\x80\x00\x12@\x02\xff\xf0\x01\x07n\x00?\xe7\xff\xe0@\x01\xbc\xc6`\x86*\x8d=M\xa9\x9a\x86\xd0L@\x0fI\xa6!\xa1\x13\xc8\x88jdi\x8d@\x03@\x1a\x1a\x0c\x0c\x83 \x00\xc4h2\x19\x01\x82D\x84e\t\xe8\x99\x89\x19\x1ah\x00\r\x1a\x11\xaf\x9b\x0fG\xf5(\x1b\x1f?\t\x12\xcf\xb5\xfc\x95E\x00ps\x89\x12^\xa4\xdd\xa2&\x05(\x87\x04\x98\x89u\xe40%\xb6\x19\'\x8c\xc4\x89\xca\x07\x0e\x1b!\x91UIFU%C\x994!DI\xd2\xfa\xf0\xf1N8W\xde\x13A\xf5\x9cr%?\x9f3;I45A\xd1\x8bT\xb1<l\xba\xcb_\xc00xY\x17r\x17\x88\x08\x08@\xa0\ry@\x10\x04$)`\xf2\xce\x89z\xb0s\xec\x9b.iW\x9d\x81\xb5-+t\x9f\x1a\'\x97dB\xf5x\xb5\xbe.[.\xd7\x0e\x81\xe7\x08\x1cN`\x88\x10\xca\x87\xc3!"\x80\x92R\xa1/\xd1\xc0\xe6mf\xac\xbd\x99\xcca\xb3\x8780>\xa4\xc7\x8d\x1a\\"\xad\xa1\xabyBg\x15\xb9l\x88\x88\x91k"\x94\xa4\xd4\x89\xae*\xa6\x0b\x10\x0c\xd6\xd4m\xe86\xec\xb5j\x8a\x86j\';\xca.\x01I\xf2\xaaJ\xe8\x88\x8cU+t3\xfb\x0c\n\xa33\x13r2\r\x16\xe0\xb3(\xbf\x1d\x83r\xe7M\xf0D\x1365\xd8\x88\xd3\xa4\x92\xcb2\x06\x04\\\xc1\xb0\xea//\xbek&\xd8\xe6+t\xe5\xa1\x13\xada\x16\xder5"w]\xa2i\xb7[\x97R \xe2IT\xcd;Z\x04dk4\xad\x8a\t\xd3\x81z\x10\xf1:^`\xab\x1f\xc5\xdc\x91N\x14$+\x9e\xae\xd3\x80'
  26
  27     if has_cmdline_bunzip2:
  28         def decompress(self, data):
  29             pop = subprocess.Popen("bunzip2", shell=True,
  30                                    stdin=subprocess.PIPE,
  31                                    stdout=subprocess.PIPE,
  32                                    stderr=subprocess.STDOUT)
  33             pop.stdin.write(data)
  34             pop.stdin.close()
  35             ret = pop.stdout.read()
  36             pop.stdout.close()
  37             if pop.wait() != 0:
  38                 ret = bz2.decompress(data)
  39             return ret
  40
  41     else:
  42         # bunzip2 isn't available to run on Windows.
  43         def decompress(self, data):
  44             return bz2.decompress(data)
  45
  46 class BZ2FileTest(BaseTest):
  47     "Test BZ2File type miscellaneous methods."
  48
  49     def setUp(self):
  50         self.filename = TESTFN
  51
  52     def tearDown(self):
  53         if os.path.isfile(self.filename):
  54             os.unlink(self.filename)
  55
  56     def createTempFile(self, crlf=0):
  57         with open(self.filename, "wb") as f:
  58             if crlf:
  59                 data = self.DATA_CRLF
  60             else:
  61                 data = self.DATA
  62             f.write(data)
  63
  64     def testRead(self):
  65         # "Test BZ2File.read()"
  66         self.createTempFile()
  67         with BZ2File(self.filename) as bz2f:
  68             self.assertRaises(TypeError, bz2f.read, None)
  69             self.assertEqual(bz2f.read(), self.TEXT)
  70
  71     def testRead0(self):
  72         # Test BBZ2File.read(0)"
  73         self.createTempFile()
  74         with BZ2File(self.filename) as bz2f:
  75             self.assertRaises(TypeError, bz2f.read, None)
  76             self.assertEqual(bz2f.read(0), "")
  77
  78     def testReadChunk10(self):
  79         # "Test BZ2File.read() in chunks of 10 bytes"
  80         self.createTempFile()
  81         with BZ2File(self.filename) as bz2f:
  82             text = ''
  83             while 1:
  84                 str = bz2f.read(10)
  85                 if not str:
  86                     break
  87                 text += str
  88             self.assertEqual(text, self.TEXT)
  89
  90     def testRead100(self):
  91         # "Test BZ2File.read(100)"
  92         self.createTempFile()
  93         with BZ2File(self.filename) as bz2f:
  94             self.assertEqual(bz2f.read(100), self.TEXT[:100])
  95
  96     def testReadLine(self):
  97         # "Test BZ2File.readline()"
  98         self.createTempFile()
  99         with BZ2File(self.filename) as bz2f:
 100             self.assertRaises(TypeError, bz2f.readline, None)
 101             sio = StringIO(self.TEXT)
 102             for line in sio.readlines():
 103                 self.assertEqual(bz2f.readline(), line)
 104
 105     def testReadLines(self):
 106         # "Test BZ2File.readlines()"
 107         self.createTempFile()
 108         with BZ2File(self.filename) as bz2f:
 109             self.assertRaises(TypeError, bz2f.readlines, None)
 110             sio = StringIO(self.TEXT)
 111             self.assertEqual(bz2f.readlines(), sio.readlines())
 112
 113     def testIterator(self):
 114         # "Test iter(BZ2File)"
 115         self.createTempFile()
 116         with BZ2File(self.filename) as bz2f:
 117             sio = StringIO(self.TEXT)
 118             self.assertEqual(list(iter(bz2f)), sio.readlines())
 119
 120     def testClosedIteratorDeadlock(self):
 121         # "Test that iteration on a closed bz2file releases the lock."
 122         # http://bugs.python.org/issue3309
 123         self.createTempFile()
 124         bz2f = BZ2File(self.filename)
 125         bz2f.close()
 126         self.assertRaises(ValueError, bz2f.next)
 127         # This call will deadlock of the above .next call failed to
 128         # release the lock.
 129         self.assertRaises(ValueError, bz2f.readlines)
 130
 131     def testXReadLines(self):
 132         # "Test BZ2File.xreadlines()"
 133         self.createTempFile()
 134         bz2f = BZ2File(self.filename)
 135         sio = StringIO(self.TEXT)
 136         self.assertEqual(list(bz2f.xreadlines()), sio.readlines())
 137         bz2f.close()
 138
 139     def testUniversalNewlinesLF(self):
 140         # "Test BZ2File.read() with universal newlines (\\n)"
 141         self.createTempFile()
 142         bz2f = BZ2File(self.filename, "rU")
 143         self.assertEqual(bz2f.read(), self.TEXT)
 144         self.assertEqual(bz2f.newlines, "\n")
 145         bz2f.close()
 146
 147     def testUniversalNewlinesCRLF(self):
 148         # "Test BZ2File.read() with universal newlines (\\r\\n)"
 149         self.createTempFile(crlf=1)
 150         bz2f = BZ2File(self.filename, "rU")
 151         self.assertEqual(bz2f.read(), self.TEXT)
 152         self.assertEqual(bz2f.newlines, "\r\n")
 153         bz2f.close()
 154
 155     def testWrite(self):
 156         # "Test BZ2File.write()"
 157         with BZ2File(self.filename, "w") as bz2f:
 158             self.assertRaises(TypeError, bz2f.write)
 159             bz2f.write(self.TEXT)
 160         with open(self.filename, 'rb') as f:
 161             self.assertEqual(self.decompress(f.read()), self.TEXT)
 162
 163     def testWriteChunks10(self):
 164         # "Test BZ2File.write() with chunks of 10 bytes"
 165         with BZ2File(self.filename, "w") as bz2f:
 166             n = 0
 167             while 1:
 168                 str = self.TEXT[n*10:(n+1)*10]
 169                 if not str:
 170                     break
 171                 bz2f.write(str)
 172                 n += 1
 173         with open(self.filename, 'rb') as f:
 174             self.assertEqual(self.decompress(f.read()), self.TEXT)
 175
 176     def testWriteLines(self):
 177         # "Test BZ2File.writelines()"
 178         with BZ2File(self.filename, "w") as bz2f:
 179             self.assertRaises(TypeError, bz2f.writelines)
 180             sio = StringIO(self.TEXT)
 181             bz2f.writelines(sio.readlines())
 182         # patch #1535500
 183         self.assertRaises(ValueError, bz2f.writelines, ["a"])
 184         with open(self.filename, 'rb') as f:
 185             self.assertEqual(self.decompress(f.read()), self.TEXT)
 186
 187     def testWriteMethodsOnReadOnlyFile(self):
 188         with BZ2File(self.filename, "w") as bz2f:
 189             bz2f.write("abc")
 190
 191         with BZ2File(self.filename, "r") as bz2f:
 192             self.assertRaises(IOError, bz2f.write, "a")
 193             self.assertRaises(IOError, bz2f.writelines, ["a"])
 194
 195     def testSeekForward(self):
 196         # "Test BZ2File.seek(150, 0)"
 197         self.createTempFile()
 198         with BZ2File(self.filename) as bz2f:
 199             self.assertRaises(TypeError, bz2f.seek)
 200             bz2f.seek(150)
 201             self.assertEqual(bz2f.read(), self.TEXT[150:])
 202
 203     def testSeekBackwards(self):
 204         # "Test BZ2File.seek(-150, 1)"
 205         self.createTempFile()
 206         with BZ2File(self.filename) as bz2f:
 207             bz2f.read(500)
 208             bz2f.seek(-150, 1)
 209             self.assertEqual(bz2f.read(), self.TEXT[500-150:])
 210
 211     def testSeekBackwardsFromEnd(self):
 212         # "Test BZ2File.seek(-150, 2)"
 213         self.createTempFile()
 214         with BZ2File(self.filename) as bz2f:
 215             bz2f.seek(-150, 2)
 216             self.assertEqual(bz2f.read(), self.TEXT[len(self.TEXT)-150:])
 217
 218     def testSeekPostEnd(self):
 219         # "Test BZ2File.seek(150000)"
 220         self.createTempFile()
 221         with BZ2File(self.filename) as bz2f:
 222             bz2f.seek(150000)
 223             self.assertEqual(bz2f.tell(), len(self.TEXT))
 224             self.assertEqual(bz2f.read(), "")
 225
 226     def testSeekPostEndTwice(self):
 227         # "Test BZ2File.seek(150000) twice"
 228         self.createTempFile()
 229         with BZ2File(self.filename) as bz2f:
 230             bz2f.seek(150000)
 231             bz2f.seek(150000)
 232             self.assertEqual(bz2f.tell(), len(self.TEXT))
 233             self.assertEqual(bz2f.read(), "")
 234
 235     def testSeekPreStart(self):
 236         # "Test BZ2File.seek(-150, 0)"
 237         self.createTempFile()
 238         with BZ2File(self.filename) as bz2f:
 239             bz2f.seek(-150)
 240             self.assertEqual(bz2f.tell(), 0)
 241             self.assertEqual(bz2f.read(), self.TEXT)
 242
 243     def testOpenDel(self):
 244         # "Test opening and deleting a file many times"
 245         self.createTempFile()
 246         for i in xrange(10000):
 247             o = BZ2File(self.filename)
 248             del o
 249
 250     def testOpenNonexistent(self):
 251         # "Test opening a nonexistent file"
 252         self.assertRaises(IOError, BZ2File, "/non/existent")
 253
 254     def testModeU(self):
 255         # Bug #1194181: bz2.BZ2File opened for write with mode "U"
 256         self.createTempFile()
 257         bz2f = BZ2File(self.filename, "U")
 258         bz2f.close()
 259         f = file(self.filename)
 260         f.seek(0, 2)
 261         self.assertEqual(f.tell(), len(self.DATA))
 262         f.close()
 263
 264     def testBug1191043(self):
 265         # readlines() for files containing no newline
 266         data = 'BZh91AY&SY\xd9b\x89]\x00\x00\x00\x03\x80\x04\x00\x02\x00\x0c\x00 \x00!\x9ah3M\x13<]\xc9\x14\xe1BCe\x8a%t'
 267         with open(self.filename, "wb") as f:
 268             f.write(data)
 269         with BZ2File(self.filename) as bz2f:
 270             lines = bz2f.readlines()
 271         self.assertEqual(lines, ['Test'])
 272         with BZ2File(self.filename) as bz2f:
 273             xlines = list(bz2f.readlines())
 274         self.assertEqual(xlines, ['Test'])
 275
 276     def testContextProtocol(self):
 277         # BZ2File supports the context management protocol
 278         f = None
 279         with BZ2File(self.filename, "wb") as f:
 280             f.write(b"xxx")
 281         f = BZ2File(self.filename, "rb")
 282         f.close()
 283         try:
 284             with f:
 285                 pass
 286         except ValueError:
 287             pass
 288         else:
 289             self.fail("__enter__ on a closed file didn't raise an exception")
 290         try:
 291             with BZ2File(self.filename, "wb") as f:
 292                 1 // 0
 293         except ZeroDivisionError:
 294             pass
 295         else:
 296             self.fail("1 // 0 didn't raise an exception")
 297
 298     @unittest.skipUnless(threading, 'Threading required for this test.')
 299     def testThreading(self):
 300         # Using a BZ2File from several threads doesn't deadlock (issue #7205).
 301         data = "1" * 2**20
 302         nthreads = 10
 303         with bz2.BZ2File(self.filename, 'wb') as f:
 304             def comp():
 305                 for i in range(5):
 306                     f.write(data)
 307             threads = [threading.Thread(target=comp) for i in range(nthreads)]
 308             for t in threads:
 309                 t.start()
 310             for t in threads:
 311                 t.join()
 312
 313     def testMixedIterationReads(self):
 314         # Issue #8397: mixed iteration and reads should be forbidden.
 315         with bz2.BZ2File(self.filename, 'wb') as f:
 316             # The internal buffer size is hard-wired to 8192 bytes, we must
 317             # write out more than that for the test to stop half through
 318             # the buffer.
 319             f.write(self.TEXT * 100)
 320         with bz2.BZ2File(self.filename, 'rb') as f:
 321             next(f)
 322             self.assertRaises(ValueError, f.read)
 323             self.assertRaises(ValueError, f.readline)
 324             self.assertRaises(ValueError, f.readlines)
 325
 326 class BZ2CompressorTest(BaseTest):
 327     def testCompress(self):
 328         # "Test BZ2Compressor.compress()/flush()"
 329         bz2c = BZ2Compressor()
 330         self.assertRaises(TypeError, bz2c.compress)
 331         data = bz2c.compress(self.TEXT)
 332         data += bz2c.flush()
 333         self.assertEqual(self.decompress(data), self.TEXT)
 334
 335     def testCompressChunks10(self):
 336         # "Test BZ2Compressor.compress()/flush() with chunks of 10 bytes"
 337         bz2c = BZ2Compressor()
 338         n = 0
 339         data = ''
 340         while 1:
 341             str = self.TEXT[n*10:(n+1)*10]
 342             if not str:
 343                 break
 344             data += bz2c.compress(str)
 345             n += 1
 346         data += bz2c.flush()
 347         self.assertEqual(self.decompress(data), self.TEXT)
 348
 349 class BZ2DecompressorTest(BaseTest):
 350     def test_Constructor(self):
 351         self.assertRaises(TypeError, BZ2Decompressor, 42)
 352
 353     def testDecompress(self):
 354         # "Test BZ2Decompressor.decompress()"
 355         bz2d = BZ2Decompressor()
 356         self.assertRaises(TypeError, bz2d.decompress)
 357         text = bz2d.decompress(self.DATA)
 358         self.assertEqual(text, self.TEXT)
 359
 360     def testDecompressChunks10(self):
 361         # "Test BZ2Decompressor.decompress() with chunks of 10 bytes"
 362         bz2d = BZ2Decompressor()
 363         text = ''
 364         n = 0
 365         while 1:
 366             str = self.DATA[n*10:(n+1)*10]
 367             if not str:
 368                 break
 369             text += bz2d.decompress(str)
 370             n += 1
 371         self.assertEqual(text, self.TEXT)
 372
 373     def testDecompressUnusedData(self):
 374         # "Test BZ2Decompressor.decompress() with unused data"
 375         bz2d = BZ2Decompressor()
 376         unused_data = "this is unused data"
 377         text = bz2d.decompress(self.DATA+unused_data)
 378         self.assertEqual(text, self.TEXT)
 379         self.assertEqual(bz2d.unused_data, unused_data)
 380
 381     def testEOFError(self):
 382         # "Calling BZ2Decompressor.decompress() after EOS must raise EOFError"
 383         bz2d = BZ2Decompressor()
 384         text = bz2d.decompress(self.DATA)
 385         self.assertRaises(EOFError, bz2d.decompress, "anything")
 386
 387
 388 class FuncTest(BaseTest):
 389     "Test module functions"
 390
 391     def testCompress(self):
 392         # "Test compress() function"
 393         data = bz2.compress(self.TEXT)
 394         self.assertEqual(self.decompress(data), self.TEXT)
 395
 396     def testDecompress(self):
 397         # "Test decompress() function"
 398         text = bz2.decompress(self.DATA)
 399         self.assertEqual(text, self.TEXT)
 400
 401     def testDecompressEmpty(self):
 402         # "Test decompress() function with empty string"
 403         text = bz2.decompress("")
 404         self.assertEqual(text, "")
 405
 406     def testDecompressIncomplete(self):
 407         # "Test decompress() function with incomplete data"
 408         self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10])
 409
 410 def test_main():
 411     test_support.run_unittest(
 412         BZ2FileTest,
 413         BZ2CompressorTest,
 414         BZ2DecompressorTest,
 415         FuncTest
 416     )
 417     test_support.reap_children()
 418
 419 if __name__ == '__main__':
 420     test_main()
 421
 422 # vim:ts=4:sw=4