Lib/test/test_bz2.py

   1 #!/usr/bin/python
   2 from test import test_support
   3 from test.test_support import TESTFN
   4
   5 import unittest
   6 from cStringIO import StringIO
   7 import os
   8 import subprocess
   9 import sys
  10
  11 import bz2
  12 from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor
  13
  14 has_cmdline_bunzip2 = sys.platform not in ("win32", "os2emx", "riscos")
  15
  16 class BaseTest(unittest.TestCase):
  17     "Base for other testcases."
  18     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'
  19     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`'
  20     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'
  21
  22     if has_cmdline_bunzip2:
  23         def decompress(self, data):
  24             pop = subprocess.Popen("bunzip2", shell=True,
  25                                    stdin=subprocess.PIPE,
  26                                    stdout=subprocess.PIPE,
  27                                    stderr=subprocess.STDOUT)
  28             pop.stdin.write(data)
  29             pop.stdin.close()
  30             ret = pop.stdout.read()
  31             pop.stdout.close()
  32             if pop.wait() != 0:
  33                 ret = bz2.decompress(data)
  34             return ret
  35
  36     else:
  37         # bunzip2 isn't available to run on Windows.
  38         def decompress(self, data):
  39             return bz2.decompress(data)
  40
  41 class BZ2FileTest(BaseTest):
  42     "Test BZ2File type miscellaneous methods."
  43
  44     def setUp(self):
  45         self.filename = TESTFN
  46
  47     def tearDown(self):
  48         if os.path.isfile(self.filename):
  49             os.unlink(self.filename)
  50
  51     def createTempFile(self, crlf=0):
  52         f = open(self.filename, "wb")
  53         if crlf:
  54             data = self.DATA_CRLF
  55         else:
  56             data = self.DATA
  57         f.write(data)
  58         f.close()
  59
  60     def testRead(self):
  61         # "Test BZ2File.read()"
  62         self.createTempFile()
  63         bz2f = BZ2File(self.filename)
  64         self.assertRaises(TypeError, bz2f.read, None)
  65         self.assertEqual(bz2f.read(), self.TEXT)
  66         bz2f.close()
  67
  68     def testReadChunk10(self):
  69         # "Test BZ2File.read() in chunks of 10 bytes"
  70         self.createTempFile()
  71         bz2f = BZ2File(self.filename)
  72         text = ''
  73         while 1:
  74             str = bz2f.read(10)
  75             if not str:
  76                 break
  77             text += str
  78         self.assertEqual(text, text)
  79         bz2f.close()
  80
  81     def testRead100(self):
  82         # "Test BZ2File.read(100)"
  83         self.createTempFile()
  84         bz2f = BZ2File(self.filename)
  85         self.assertEqual(bz2f.read(100), self.TEXT[:100])
  86         bz2f.close()
  87
  88     def testReadLine(self):
  89         # "Test BZ2File.readline()"
  90         self.createTempFile()
  91         bz2f = BZ2File(self.filename)
  92         self.assertRaises(TypeError, bz2f.readline, None)
  93         sio = StringIO(self.TEXT)
  94         for line in sio.readlines():
  95             self.assertEqual(bz2f.readline(), line)
  96         bz2f.close()
  97
  98     def testReadLines(self):
  99         # "Test BZ2File.readlines()"
 100         self.createTempFile()
 101         bz2f = BZ2File(self.filename)
 102         self.assertRaises(TypeError, bz2f.readlines, None)
 103         sio = StringIO(self.TEXT)
 104         self.assertEqual(bz2f.readlines(), sio.readlines())
 105         bz2f.close()
 106
 107     def testIterator(self):
 108         # "Test iter(BZ2File)"
 109         self.createTempFile()
 110         bz2f = BZ2File(self.filename)
 111         sio = StringIO(self.TEXT)
 112         self.assertEqual(list(iter(bz2f)), sio.readlines())
 113         bz2f.close()
 114
 115     def testClosedIteratorDeadlock(self):
 116         # "Test that iteration on a closed bz2file releases the lock."
 117         # http://bugs.python.org/issue3309
 118         self.createTempFile()
 119         bz2f = BZ2File(self.filename)
 120         bz2f.close()
 121         self.assertRaises(ValueError, bz2f.next)
 122         # This call will deadlock of the above .next call failed to
 123         # release the lock.
 124         self.assertRaises(ValueError, bz2f.readlines)
 125
 126     def testXReadLines(self):
 127         # "Test BZ2File.xreadlines()"
 128         self.createTempFile()
 129         bz2f = BZ2File(self.filename)
 130         sio = StringIO(self.TEXT)
 131         self.assertEqual(list(bz2f.xreadlines()), sio.readlines())
 132         bz2f.close()
 133
 134     def testUniversalNewlinesLF(self):
 135         # "Test BZ2File.read() with universal newlines (\\n)"
 136         self.createTempFile()
 137         bz2f = BZ2File(self.filename, "rU")
 138         self.assertEqual(bz2f.read(), self.TEXT)
 139         self.assertEqual(bz2f.newlines, "\n")
 140         bz2f.close()
 141
 142     def testUniversalNewlinesCRLF(self):
 143         # "Test BZ2File.read() with universal newlines (\\r\\n)"
 144         self.createTempFile(crlf=1)
 145         bz2f = BZ2File(self.filename, "rU")
 146         self.assertEqual(bz2f.read(), self.TEXT)
 147         self.assertEqual(bz2f.newlines, "\r\n")
 148         bz2f.close()
 149
 150     def testWrite(self):
 151         # "Test BZ2File.write()"
 152         bz2f = BZ2File(self.filename, "w")
 153         self.assertRaises(TypeError, bz2f.write)
 154         bz2f.write(self.TEXT)
 155         bz2f.close()
 156         f = open(self.filename, 'rb')
 157         self.assertEqual(self.decompress(f.read()), self.TEXT)
 158         f.close()
 159
 160     def testWriteChunks10(self):
 161         # "Test BZ2File.write() with chunks of 10 bytes"
 162         bz2f = BZ2File(self.filename, "w")
 163         n = 0
 164         while 1:
 165             str = self.TEXT[n*10:(n+1)*10]
 166             if not str:
 167                 break
 168             bz2f.write(str)
 169             n += 1
 170         bz2f.close()
 171         f = open(self.filename, 'rb')
 172         self.assertEqual(self.decompress(f.read()), self.TEXT)
 173         f.close()
 174
 175     def testWriteLines(self):
 176         # "Test BZ2File.writelines()"
 177         bz2f = BZ2File(self.filename, "w")
 178         self.assertRaises(TypeError, bz2f.writelines)
 179         sio = StringIO(self.TEXT)
 180         bz2f.writelines(sio.readlines())
 181         bz2f.close()
 182         # patch #1535500
 183         self.assertRaises(ValueError, bz2f.writelines, ["a"])
 184         f = open(self.filename, 'rb')
 185         self.assertEqual(self.decompress(f.read()), self.TEXT)
 186         f.close()
 187
 188     def testWriteMethodsOnReadOnlyFile(self):
 189         bz2f = BZ2File(self.filename, "w")
 190         bz2f.write("abc")
 191         bz2f.close()
 192
 193         bz2f = BZ2File(self.filename, "r")
 194         self.assertRaises(IOError, bz2f.write, "a")
 195         self.assertRaises(IOError, bz2f.writelines, ["a"])
 196
 197     def testSeekForward(self):
 198         # "Test BZ2File.seek(150, 0)"
 199         self.createTempFile()
 200         bz2f = BZ2File(self.filename)
 201         self.assertRaises(TypeError, bz2f.seek)
 202         bz2f.seek(150)
 203         self.assertEqual(bz2f.read(), self.TEXT[150:])
 204         bz2f.close()
 205
 206     def testSeekBackwards(self):
 207         # "Test BZ2File.seek(-150, 1)"
 208         self.createTempFile()
 209         bz2f = BZ2File(self.filename)
 210         bz2f.read(500)
 211         bz2f.seek(-150, 1)
 212         self.assertEqual(bz2f.read(), self.TEXT[500-150:])
 213         bz2f.close()
 214
 215     def testSeekBackwardsFromEnd(self):
 216         # "Test BZ2File.seek(-150, 2)"
 217         self.createTempFile()
 218         bz2f = BZ2File(self.filename)
 219         bz2f.seek(-150, 2)
 220         self.assertEqual(bz2f.read(), self.TEXT[len(self.TEXT)-150:])
 221         bz2f.close()
 222
 223     def testSeekPostEnd(self):
 224         # "Test BZ2File.seek(150000)"
 225         self.createTempFile()
 226         bz2f = BZ2File(self.filename)
 227         bz2f.seek(150000)
 228         self.assertEqual(bz2f.tell(), len(self.TEXT))
 229         self.assertEqual(bz2f.read(), "")
 230         bz2f.close()
 231
 232     def testSeekPostEndTwice(self):
 233         # "Test BZ2File.seek(150000) twice"
 234         self.createTempFile()
 235         bz2f = BZ2File(self.filename)
 236         bz2f.seek(150000)
 237         bz2f.seek(150000)
 238         self.assertEqual(bz2f.tell(), len(self.TEXT))
 239         self.assertEqual(bz2f.read(), "")
 240         bz2f.close()
 241
 242     def testSeekPreStart(self):
 243         # "Test BZ2File.seek(-150, 0)"
 244         self.createTempFile()
 245         bz2f = BZ2File(self.filename)
 246         bz2f.seek(-150)
 247         self.assertEqual(bz2f.tell(), 0)
 248         self.assertEqual(bz2f.read(), self.TEXT)
 249         bz2f.close()
 250
 251     def testOpenDel(self):
 252         # "Test opening and deleting a file many times"
 253         self.createTempFile()
 254         for i in xrange(10000):
 255             o = BZ2File(self.filename)
 256             del o
 257
 258     def testOpenNonexistent(self):
 259         # "Test opening a nonexistent file"
 260         self.assertRaises(IOError, BZ2File, "/non/existent")
 261
 262     def testModeU(self):
 263         # Bug #1194181: bz2.BZ2File opened for write with mode "U"
 264         self.createTempFile()
 265         bz2f = BZ2File(self.filename, "U")
 266         bz2f.close()
 267         f = file(self.filename)
 268         f.seek(0, 2)
 269         self.assertEqual(f.tell(), len(self.DATA))
 270         f.close()
 271
 272     def testBug1191043(self):
 273         # readlines() for files containing no newline
 274         data = 'BZh91AY&SY\xd9b\x89]\x00\x00\x00\x03\x80\x04\x00\x02\x00\x0c\x00 \x00!\x9ah3M\x13<]\xc9\x14\xe1BCe\x8a%t'
 275         f = open(self.filename, "wb")
 276         f.write(data)
 277         f.close()
 278         bz2f = BZ2File(self.filename)
 279         lines = bz2f.readlines()
 280         bz2f.close()
 281         self.assertEqual(lines, ['Test'])
 282         bz2f = BZ2File(self.filename)
 283         xlines = list(bz2f.xreadlines())
 284         bz2f.close()
 285         self.assertEqual(xlines, ['Test'])
 286
 287     def testContextProtocol(self):
 288         # BZ2File supports the context management protocol
 289         f = None
 290         with BZ2File(self.filename, "wb") as f:
 291             f.write(b"xxx")
 292         f = BZ2File(self.filename, "rb")
 293         f.close()
 294         try:
 295             with f:
 296                 pass
 297         except ValueError:
 298             pass
 299         else:
 300             self.fail("__enter__ on a closed file didn't raise an exception")
 301         try:
 302             with BZ2File(self.filename, "wb") as f:
 303                 1/0
 304         except ZeroDivisionError:
 305             pass
 306         else:
 307             self.fail("1/0 didn't raise an exception")
 308
 309
 310 class BZ2CompressorTest(BaseTest):
 311     def testCompress(self):
 312         # "Test BZ2Compressor.compress()/flush()"
 313         bz2c = BZ2Compressor()
 314         self.assertRaises(TypeError, bz2c.compress)
 315         data = bz2c.compress(self.TEXT)
 316         data += bz2c.flush()
 317         self.assertEqual(self.decompress(data), self.TEXT)
 318
 319     def testCompressChunks10(self):
 320         # "Test BZ2Compressor.compress()/flush() with chunks of 10 bytes"
 321         bz2c = BZ2Compressor()
 322         n = 0
 323         data = ''
 324         while 1:
 325             str = self.TEXT[n*10:(n+1)*10]
 326             if not str:
 327                 break
 328             data += bz2c.compress(str)
 329             n += 1
 330         data += bz2c.flush()
 331         self.assertEqual(self.decompress(data), self.TEXT)
 332
 333 class BZ2DecompressorTest(BaseTest):
 334     def test_Constructor(self):
 335         self.assertRaises(TypeError, BZ2Decompressor, 42)
 336
 337     def testDecompress(self):
 338         # "Test BZ2Decompressor.decompress()"
 339         bz2d = BZ2Decompressor()
 340         self.assertRaises(TypeError, bz2d.decompress)
 341         text = bz2d.decompress(self.DATA)
 342         self.assertEqual(text, self.TEXT)
 343
 344     def testDecompressChunks10(self):
 345         # "Test BZ2Decompressor.decompress() with chunks of 10 bytes"
 346         bz2d = BZ2Decompressor()
 347         text = ''
 348         n = 0
 349         while 1:
 350             str = self.DATA[n*10:(n+1)*10]
 351             if not str:
 352                 break
 353             text += bz2d.decompress(str)
 354             n += 1
 355         self.assertEqual(text, self.TEXT)
 356
 357     def testDecompressUnusedData(self):
 358         # "Test BZ2Decompressor.decompress() with unused data"
 359         bz2d = BZ2Decompressor()
 360         unused_data = "this is unused data"
 361         text = bz2d.decompress(self.DATA+unused_data)
 362         self.assertEqual(text, self.TEXT)
 363         self.assertEqual(bz2d.unused_data, unused_data)
 364
 365     def testEOFError(self):
 366         # "Calling BZ2Decompressor.decompress() after EOS must raise EOFError"
 367         bz2d = BZ2Decompressor()
 368         text = bz2d.decompress(self.DATA)
 369         self.assertRaises(EOFError, bz2d.decompress, "anything")
 370
 371
 372 class FuncTest(BaseTest):
 373     "Test module functions"
 374
 375     def testCompress(self):
 376         # "Test compress() function"
 377         data = bz2.compress(self.TEXT)
 378         self.assertEqual(self.decompress(data), self.TEXT)
 379
 380     def testDecompress(self):
 381         # "Test decompress() function"
 382         text = bz2.decompress(self.DATA)
 383         self.assertEqual(text, self.TEXT)
 384
 385     def testDecompressEmpty(self):
 386         # "Test decompress() function with empty string"
 387         text = bz2.decompress("")
 388         self.assertEqual(text, "")
 389
 390     def testDecompressIncomplete(self):
 391         # "Test decompress() function with incomplete data"
 392         self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10])
 393
 394 def test_main():
 395     test_support.run_unittest(
 396         BZ2FileTest,
 397         BZ2CompressorTest,
 398         BZ2DecompressorTest,
 399         FuncTest
 400     )
 401     test_support.reap_children()
 402
 403 if __name__ == '__main__':
 404     test_main()
 405
 406 # vim:ts=4:sw=4