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 popen2
   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")
  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 = popen2.Popen3("bunzip2", capturestderr=1)
  25             pop.tochild.write(data)
  26             pop.tochild.close()
  27             ret = pop.fromchild.read()
  28             pop.fromchild.close()
  29             if pop.wait() != 0:
  30                 ret = bz2.decompress(data)
  31             return ret
  32
  33     else:
  34         # popen2.Popen3 doesn't exist on Windows, and even if it did, bunzip2
  35         # isn't available to run.
  36         def decompress(self, data):
  37             return bz2.decompress(data)
  38
  39 class BZ2FileTest(BaseTest):
  40     "Test MCRYPT type miscelaneous methods."
  41
  42     def setUp(self):
  43         self.filename = TESTFN
  44
  45     def tearDown(self):
  46         if os.path.isfile(self.filename):
  47             os.unlink(self.filename)
  48
  49     def createTempFile(self, crlf=0):
  50         f = open(self.filename, "wb")
  51         if crlf:
  52             data = self.DATA_CRLF
  53         else:
  54             data = self.DATA
  55         f.write(data)
  56         f.close()
  57
  58     def testRead(self):
  59         # "Test BZ2File.read()"
  60         self.createTempFile()
  61         bz2f = BZ2File(self.filename)
  62         self.assertEqual(bz2f.read(), self.TEXT)
  63         bz2f.close()
  64
  65     def testReadChunk10(self):
  66         # "Test BZ2File.read() in chunks of 10 bytes"
  67         self.createTempFile()
  68         bz2f = BZ2File(self.filename)
  69         text = ''
  70         while 1:
  71             str = bz2f.read(10)
  72             if not str:
  73                 break
  74             text += str
  75         self.assertEqual(text, text)
  76         bz2f.close()
  77
  78     def testRead100(self):
  79         # "Test BZ2File.read(100)"
  80         self.createTempFile()
  81         bz2f = BZ2File(self.filename)
  82         self.assertEqual(bz2f.read(100), self.TEXT[:100])
  83         bz2f.close()
  84
  85     def testReadLine(self):
  86         # "Test BZ2File.readline()"
  87         self.createTempFile()
  88         bz2f = BZ2File(self.filename)
  89         sio = StringIO(self.TEXT)
  90         for line in sio.readlines():
  91             self.assertEqual(bz2f.readline(), line)
  92         bz2f.close()
  93
  94     def testReadLines(self):
  95         # "Test BZ2File.readlines()"
  96         self.createTempFile()
  97         bz2f = BZ2File(self.filename)
  98         sio = StringIO(self.TEXT)
  99         self.assertEqual(bz2f.readlines(), sio.readlines())
 100         bz2f.close()
 101
 102     def testIterator(self):
 103         # "Test iter(BZ2File)"
 104         self.createTempFile()
 105         bz2f = BZ2File(self.filename)
 106         sio = StringIO(self.TEXT)
 107         self.assertEqual(list(iter(bz2f)), sio.readlines())
 108         bz2f.close()
 109
 110     def testXReadLines(self):
 111         # "Test BZ2File.xreadlines()"
 112         self.createTempFile()
 113         bz2f = BZ2File(self.filename)
 114         sio = StringIO(self.TEXT)
 115         self.assertEqual(list(bz2f.xreadlines()), sio.readlines())
 116         bz2f.close()
 117
 118     def testUniversalNewlinesLF(self):
 119         # "Test BZ2File.read() with universal newlines (\\n)"
 120         self.createTempFile()
 121         bz2f = BZ2File(self.filename, "rU")
 122         self.assertEqual(bz2f.read(), self.TEXT)
 123         self.assertEqual(bz2f.newlines, "\n")
 124         bz2f.close()
 125
 126     def testUniversalNewlinesCRLF(self):
 127         # "Test BZ2File.read() with universal newlines (\\r\\n)"
 128         self.createTempFile(crlf=1)
 129         bz2f = BZ2File(self.filename, "rU")
 130         self.assertEqual(bz2f.read(), self.TEXT)
 131         self.assertEqual(bz2f.newlines, "\r\n")
 132         bz2f.close()
 133
 134     def testWrite(self):
 135         # "Test BZ2File.write()"
 136         bz2f = BZ2File(self.filename, "w")
 137         bz2f.write(self.TEXT)
 138         bz2f.close()
 139         f = open(self.filename, 'rb')
 140         self.assertEqual(self.decompress(f.read()), self.TEXT)
 141         f.close()
 142
 143     def testWriteChunks10(self):
 144         # "Test BZ2File.write() with chunks of 10 bytes"
 145         bz2f = BZ2File(self.filename, "w")
 146         n = 0
 147         while 1:
 148             str = self.TEXT[n*10:(n+1)*10]
 149             if not str:
 150                 break
 151             bz2f.write(str)
 152             n += 1
 153         bz2f.close()
 154         f = open(self.filename, 'rb')
 155         self.assertEqual(self.decompress(f.read()), self.TEXT)
 156         f.close()
 157
 158     def testWriteLines(self):
 159         # "Test BZ2File.writelines()"
 160         bz2f = BZ2File(self.filename, "w")
 161         sio = StringIO(self.TEXT)
 162         bz2f.writelines(sio.readlines())
 163         bz2f.close()
 164         f = open(self.filename, 'rb')
 165         self.assertEqual(self.decompress(f.read()), self.TEXT)
 166         f.close()
 167
 168     def testSeekForward(self):
 169         # "Test BZ2File.seek(150, 0)"
 170         self.createTempFile()
 171         bz2f = BZ2File(self.filename)
 172         bz2f.seek(150)
 173         self.assertEqual(bz2f.read(), self.TEXT[150:])
 174         bz2f.close()
 175
 176     def testSeekBackwards(self):
 177         # "Test BZ2File.seek(-150, 1)"
 178         self.createTempFile()
 179         bz2f = BZ2File(self.filename)
 180         bz2f.read(500)
 181         bz2f.seek(-150, 1)
 182         self.assertEqual(bz2f.read(), self.TEXT[500-150:])
 183         bz2f.close()
 184
 185     def testSeekBackwardsFromEnd(self):
 186         # "Test BZ2File.seek(-150, 2)"
 187         self.createTempFile()
 188         bz2f = BZ2File(self.filename)
 189         bz2f.seek(-150, 2)
 190         self.assertEqual(bz2f.read(), self.TEXT[len(self.TEXT)-150:])
 191         bz2f.close()
 192
 193     def testSeekPostEnd(self):
 194         # "Test BZ2File.seek(150000)"
 195         self.createTempFile()
 196         bz2f = BZ2File(self.filename)
 197         bz2f.seek(150000)
 198         self.assertEqual(bz2f.tell(), len(self.TEXT))
 199         self.assertEqual(bz2f.read(), "")
 200         bz2f.close()
 201
 202     def testSeekPostEndTwice(self):
 203         # "Test BZ2File.seek(150000) twice"
 204         self.createTempFile()
 205         bz2f = BZ2File(self.filename)
 206         bz2f.seek(150000)
 207         bz2f.seek(150000)
 208         self.assertEqual(bz2f.tell(), len(self.TEXT))
 209         self.assertEqual(bz2f.read(), "")
 210         bz2f.close()
 211
 212     def testSeekPreStart(self):
 213         # "Test BZ2File.seek(-150, 0)"
 214         self.createTempFile()
 215         bz2f = BZ2File(self.filename)
 216         bz2f.seek(-150)
 217         self.assertEqual(bz2f.tell(), 0)
 218         self.assertEqual(bz2f.read(), self.TEXT)
 219         bz2f.close()
 220
 221 class BZ2CompressorTest(BaseTest):
 222     def testCompress(self):
 223         # "Test BZ2Compressor.compress()/flush()"
 224         bz2c = BZ2Compressor()
 225         data = bz2c.compress(self.TEXT)
 226         data += bz2c.flush()
 227         self.assertEqual(self.decompress(data), self.TEXT)
 228
 229     def testCompressChunks10(self):
 230         # "Test BZ2Compressor.compress()/flush() with chunks of 10 bytes"
 231         bz2c = BZ2Compressor()
 232         n = 0
 233         data = ''
 234         while 1:
 235             str = self.TEXT[n*10:(n+1)*10]
 236             if not str:
 237                 break
 238             data += bz2c.compress(str)
 239             n += 1
 240         data += bz2c.flush()
 241         self.assertEqual(self.decompress(data), self.TEXT)
 242
 243 class BZ2DecompressorTest(BaseTest):
 244     def testDecompress(self):
 245         # "Test BZ2Decompressor.decompress()"
 246         bz2d = BZ2Decompressor()
 247         text = bz2d.decompress(self.DATA)
 248         self.assertEqual(text, self.TEXT)
 249
 250     def testDecompressChunks10(self):
 251         # "Test BZ2Decompressor.decompress() with chunks of 10 bytes"
 252         bz2d = BZ2Decompressor()
 253         text = ''
 254         n = 0
 255         while 1:
 256             str = self.DATA[n*10:(n+1)*10]
 257             if not str:
 258                 break
 259             text += bz2d.decompress(str)
 260             n += 1
 261         self.assertEqual(text, self.TEXT)
 262
 263     def testDecompressUnusedData(self):
 264         # "Test BZ2Decompressor.decompress() with unused data"
 265         bz2d = BZ2Decompressor()
 266         unused_data = "this is unused data"
 267         text = bz2d.decompress(self.DATA+unused_data)
 268         self.assertEqual(text, self.TEXT)
 269         self.assertEqual(bz2d.unused_data, unused_data)
 270
 271     def testEOFError(self):
 272         # "Calling BZ2Decompressor.decompress() after EOS must raise EOFError"
 273         bz2d = BZ2Decompressor()
 274         text = bz2d.decompress(self.DATA)
 275         self.assertRaises(EOFError, bz2d.decompress, "anything")
 276
 277
 278 class FuncTest(BaseTest):
 279     "Test module functions"
 280
 281     def testCompress(self):
 282         # "Test compress() function"
 283         data = bz2.compress(self.TEXT)
 284         self.assertEqual(self.decompress(data), self.TEXT)
 285
 286     def testDecompress(self):
 287         # "Test decompress() function"
 288         text = bz2.decompress(self.DATA)
 289         self.assertEqual(text, self.TEXT)
 290
 291     def testDecompressEmpty(self):
 292         # "Test decompress() function with empty string"
 293         text = bz2.decompress("")
 294         self.assertEqual(text, "")
 295
 296     def testDecompressIncomplete(self):
 297         # "Test decompress() function with incomplete data"
 298         self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10])
 299
 300 def test_main():
 301     suite = unittest.TestSuite()
 302     for test in (BZ2FileTest,
 303                  BZ2CompressorTest,
 304                  BZ2DecompressorTest,
 305                  FuncTest):
 306         suite.addTest(unittest.makeSuite(test))
 307     test_support.run_suite(suite)
 308
 309 if __name__ == '__main__':
 310     test_main()
 311
 312 # vim:ts=4:sw=4