source: python/trunk/Lib/test/test_bz2.py

Last change on this file was 391, checked in by dmik, 11 years ago

python: Merge vendor 2.7.6 to trunk.
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File size: 18.9 KB
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1#!/usr/bin/env python
2from test import test_support
3from test.test_support import TESTFN, _4G, bigmemtest, import_module, findfile
4
5import unittest
6from cStringIO import StringIO
7import os
8import subprocess
9import sys
10
11try:
12 import threading
13except ImportError:
14 threading = None
15
16bz2 = import_module('bz2')
17from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor
18
19has_cmdline_bunzip2 = sys.platform not in ("win32", "os2emx", "riscos")
20
21class 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 EMPTY_DATA = 'BZh9\x17rE8P\x90\x00\x00\x00\x00'
27
28 if has_cmdline_bunzip2:
29 def decompress(self, data):
30 pop = subprocess.Popen("bunzip2", shell=True,
31 stdin=subprocess.PIPE,
32 stdout=subprocess.PIPE,
33 stderr=subprocess.STDOUT)
34 pop.stdin.write(data)
35 pop.stdin.close()
36 ret = pop.stdout.read()
37 pop.stdout.close()
38 if pop.wait() != 0:
39 ret = bz2.decompress(data)
40 return ret
41
42 else:
43 # bunzip2 isn't available to run on Windows.
44 def decompress(self, data):
45 return bz2.decompress(data)
46
47
48class BZ2FileTest(BaseTest):
49 "Test BZ2File type miscellaneous methods."
50
51 def setUp(self):
52 self.filename = TESTFN
53
54 def tearDown(self):
55 if os.path.isfile(self.filename):
56 os.unlink(self.filename)
57
58 def createTempFile(self, crlf=0):
59 with open(self.filename, "wb") as f:
60 if crlf:
61 data = self.DATA_CRLF
62 else:
63 data = self.DATA
64 f.write(data)
65
66 def testRead(self):
67 # "Test BZ2File.read()"
68 self.createTempFile()
69 with BZ2File(self.filename) as bz2f:
70 self.assertRaises(TypeError, bz2f.read, None)
71 self.assertEqual(bz2f.read(), self.TEXT)
72
73 def testRead0(self):
74 # Test BBZ2File.read(0)"
75 self.createTempFile()
76 with BZ2File(self.filename) as bz2f:
77 self.assertRaises(TypeError, bz2f.read, None)
78 self.assertEqual(bz2f.read(0), "")
79
80 def testReadChunk10(self):
81 # "Test BZ2File.read() in chunks of 10 bytes"
82 self.createTempFile()
83 with BZ2File(self.filename) as bz2f:
84 text = ''
85 while 1:
86 str = bz2f.read(10)
87 if not str:
88 break
89 text += str
90 self.assertEqual(text, self.TEXT)
91
92 def testRead100(self):
93 # "Test BZ2File.read(100)"
94 self.createTempFile()
95 with BZ2File(self.filename) as bz2f:
96 self.assertEqual(bz2f.read(100), self.TEXT[:100])
97
98 def testReadLine(self):
99 # "Test BZ2File.readline()"
100 self.createTempFile()
101 with BZ2File(self.filename) as bz2f:
102 self.assertRaises(TypeError, bz2f.readline, None)
103 sio = StringIO(self.TEXT)
104 for line in sio.readlines():
105 self.assertEqual(bz2f.readline(), line)
106
107 def testReadLines(self):
108 # "Test BZ2File.readlines()"
109 self.createTempFile()
110 with BZ2File(self.filename) as bz2f:
111 self.assertRaises(TypeError, bz2f.readlines, None)
112 sio = StringIO(self.TEXT)
113 self.assertEqual(bz2f.readlines(), sio.readlines())
114
115 def testIterator(self):
116 # "Test iter(BZ2File)"
117 self.createTempFile()
118 with BZ2File(self.filename) as bz2f:
119 sio = StringIO(self.TEXT)
120 self.assertEqual(list(iter(bz2f)), sio.readlines())
121
122 def testClosedIteratorDeadlock(self):
123 # "Test that iteration on a closed bz2file releases the lock."
124 # http://bugs.python.org/issue3309
125 self.createTempFile()
126 bz2f = BZ2File(self.filename)
127 bz2f.close()
128 self.assertRaises(ValueError, bz2f.next)
129 # This call will deadlock of the above .next call failed to
130 # release the lock.
131 self.assertRaises(ValueError, bz2f.readlines)
132
133 def testXReadLines(self):
134 # "Test BZ2File.xreadlines()"
135 self.createTempFile()
136 bz2f = BZ2File(self.filename)
137 sio = StringIO(self.TEXT)
138 self.assertEqual(list(bz2f.xreadlines()), sio.readlines())
139 bz2f.close()
140
141 def testUniversalNewlinesLF(self):
142 # "Test BZ2File.read() with universal newlines (\\n)"
143 self.createTempFile()
144 bz2f = BZ2File(self.filename, "rU")
145 self.assertEqual(bz2f.read(), self.TEXT)
146 self.assertEqual(bz2f.newlines, "\n")
147 bz2f.close()
148
149 def testUniversalNewlinesCRLF(self):
150 # "Test BZ2File.read() with universal newlines (\\r\\n)"
151 self.createTempFile(crlf=1)
152 bz2f = BZ2File(self.filename, "rU")
153 self.assertEqual(bz2f.read(), self.TEXT)
154 self.assertEqual(bz2f.newlines, "\r\n")
155 bz2f.close()
156
157 def testWrite(self):
158 # "Test BZ2File.write()"
159 with BZ2File(self.filename, "w") as bz2f:
160 self.assertRaises(TypeError, bz2f.write)
161 bz2f.write(self.TEXT)
162 with open(self.filename, 'rb') as f:
163 self.assertEqual(self.decompress(f.read()), self.TEXT)
164
165 def testWriteChunks10(self):
166 # "Test BZ2File.write() with chunks of 10 bytes"
167 with BZ2File(self.filename, "w") as bz2f:
168 n = 0
169 while 1:
170 str = self.TEXT[n*10:(n+1)*10]
171 if not str:
172 break
173 bz2f.write(str)
174 n += 1
175 with open(self.filename, 'rb') as f:
176 self.assertEqual(self.decompress(f.read()), self.TEXT)
177
178 def testWriteLines(self):
179 # "Test BZ2File.writelines()"
180 with BZ2File(self.filename, "w") as bz2f:
181 self.assertRaises(TypeError, bz2f.writelines)
182 sio = StringIO(self.TEXT)
183 bz2f.writelines(sio.readlines())
184 # patch #1535500
185 self.assertRaises(ValueError, bz2f.writelines, ["a"])
186 with open(self.filename, 'rb') as f:
187 self.assertEqual(self.decompress(f.read()), self.TEXT)
188
189 def testWriteMethodsOnReadOnlyFile(self):
190 with BZ2File(self.filename, "w") as bz2f:
191 bz2f.write("abc")
192
193 with BZ2File(self.filename, "r") as bz2f:
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 with BZ2File(self.filename) as bz2f:
201 self.assertRaises(TypeError, bz2f.seek)
202 bz2f.seek(150)
203 self.assertEqual(bz2f.read(), self.TEXT[150:])
204
205 def testSeekBackwards(self):
206 # "Test BZ2File.seek(-150, 1)"
207 self.createTempFile()
208 with BZ2File(self.filename) as bz2f:
209 bz2f.read(500)
210 bz2f.seek(-150, 1)
211 self.assertEqual(bz2f.read(), self.TEXT[500-150:])
212
213 def testSeekBackwardsFromEnd(self):
214 # "Test BZ2File.seek(-150, 2)"
215 self.createTempFile()
216 with BZ2File(self.filename) as bz2f:
217 bz2f.seek(-150, 2)
218 self.assertEqual(bz2f.read(), self.TEXT[len(self.TEXT)-150:])
219
220 def testSeekPostEnd(self):
221 # "Test BZ2File.seek(150000)"
222 self.createTempFile()
223 with BZ2File(self.filename) as bz2f:
224 bz2f.seek(150000)
225 self.assertEqual(bz2f.tell(), len(self.TEXT))
226 self.assertEqual(bz2f.read(), "")
227
228 def testSeekPostEndTwice(self):
229 # "Test BZ2File.seek(150000) twice"
230 self.createTempFile()
231 with BZ2File(self.filename) as bz2f:
232 bz2f.seek(150000)
233 bz2f.seek(150000)
234 self.assertEqual(bz2f.tell(), len(self.TEXT))
235 self.assertEqual(bz2f.read(), "")
236
237 def testSeekPreStart(self):
238 # "Test BZ2File.seek(-150, 0)"
239 self.createTempFile()
240 with BZ2File(self.filename) as bz2f:
241 bz2f.seek(-150)
242 self.assertEqual(bz2f.tell(), 0)
243 self.assertEqual(bz2f.read(), self.TEXT)
244
245 def testOpenDel(self):
246 # "Test opening and deleting a file many times"
247 self.createTempFile()
248 for i in xrange(10000):
249 o = BZ2File(self.filename)
250 del o
251
252 def testOpenNonexistent(self):
253 # "Test opening a nonexistent file"
254 self.assertRaises(IOError, BZ2File, "/non/existent")
255
256 def testModeU(self):
257 # Bug #1194181: bz2.BZ2File opened for write with mode "U"
258 self.createTempFile()
259 bz2f = BZ2File(self.filename, "U")
260 bz2f.close()
261 f = file(self.filename)
262 f.seek(0, 2)
263 self.assertEqual(f.tell(), len(self.DATA))
264 f.close()
265
266 def testBug1191043(self):
267 # readlines() for files containing no newline
268 data = 'BZh91AY&SY\xd9b\x89]\x00\x00\x00\x03\x80\x04\x00\x02\x00\x0c\x00 \x00!\x9ah3M\x13<]\xc9\x14\xe1BCe\x8a%t'
269 with open(self.filename, "wb") as f:
270 f.write(data)
271 with BZ2File(self.filename) as bz2f:
272 lines = bz2f.readlines()
273 self.assertEqual(lines, ['Test'])
274 with BZ2File(self.filename) as bz2f:
275 xlines = list(bz2f.readlines())
276 self.assertEqual(xlines, ['Test'])
277
278 def testContextProtocol(self):
279 # BZ2File supports the context management protocol
280 f = None
281 with BZ2File(self.filename, "wb") as f:
282 f.write(b"xxx")
283 f = BZ2File(self.filename, "rb")
284 f.close()
285 try:
286 with f:
287 pass
288 except ValueError:
289 pass
290 else:
291 self.fail("__enter__ on a closed file didn't raise an exception")
292 try:
293 with BZ2File(self.filename, "wb") as f:
294 1 // 0
295 except ZeroDivisionError:
296 pass
297 else:
298 self.fail("1 // 0 didn't raise an exception")
299
300 @unittest.skipUnless(threading, 'Threading required for this test.')
301 def testThreading(self):
302 # Using a BZ2File from several threads doesn't deadlock (issue #7205).
303 data = "1" * 2**20
304 nthreads = 10
305 with bz2.BZ2File(self.filename, 'wb') as f:
306 def comp():
307 for i in range(5):
308 f.write(data)
309 threads = [threading.Thread(target=comp) for i in range(nthreads)]
310 for t in threads:
311 t.start()
312 for t in threads:
313 t.join()
314
315 def testMixedIterationReads(self):
316 # Issue #8397: mixed iteration and reads should be forbidden.
317 with bz2.BZ2File(self.filename, 'wb') as f:
318 # The internal buffer size is hard-wired to 8192 bytes, we must
319 # write out more than that for the test to stop half through
320 # the buffer.
321 f.write(self.TEXT * 100)
322 with bz2.BZ2File(self.filename, 'rb') as f:
323 next(f)
324 self.assertRaises(ValueError, f.read)
325 self.assertRaises(ValueError, f.readline)
326 self.assertRaises(ValueError, f.readlines)
327
328class BZ2CompressorTest(BaseTest):
329 def testCompress(self):
330 # "Test BZ2Compressor.compress()/flush()"
331 bz2c = BZ2Compressor()
332 self.assertRaises(TypeError, bz2c.compress)
333 data = bz2c.compress(self.TEXT)
334 data += bz2c.flush()
335 self.assertEqual(self.decompress(data), self.TEXT)
336
337 def testCompressEmptyString(self):
338 # "Test BZ2Compressor.compress()/flush() of empty string"
339 bz2c = BZ2Compressor()
340 data = bz2c.compress('')
341 data += bz2c.flush()
342 self.assertEqual(data, self.EMPTY_DATA)
343
344 def testCompressChunks10(self):
345 # "Test BZ2Compressor.compress()/flush() with chunks of 10 bytes"
346 bz2c = BZ2Compressor()
347 n = 0
348 data = ''
349 while 1:
350 str = self.TEXT[n*10:(n+1)*10]
351 if not str:
352 break
353 data += bz2c.compress(str)
354 n += 1
355 data += bz2c.flush()
356 self.assertEqual(self.decompress(data), self.TEXT)
357
358 @bigmemtest(_4G, memuse=1.25)
359 def testBigmem(self, size):
360 text = "a" * size
361 bz2c = bz2.BZ2Compressor()
362 data = bz2c.compress(text) + bz2c.flush()
363 del text
364 text = self.decompress(data)
365 self.assertEqual(len(text), size)
366 self.assertEqual(text.strip("a"), "")
367
368
369class BZ2DecompressorTest(BaseTest):
370 def test_Constructor(self):
371 self.assertRaises(TypeError, BZ2Decompressor, 42)
372
373 def testDecompress(self):
374 # "Test BZ2Decompressor.decompress()"
375 bz2d = BZ2Decompressor()
376 self.assertRaises(TypeError, bz2d.decompress)
377 text = bz2d.decompress(self.DATA)
378 self.assertEqual(text, self.TEXT)
379
380 def testDecompressChunks10(self):
381 # "Test BZ2Decompressor.decompress() with chunks of 10 bytes"
382 bz2d = BZ2Decompressor()
383 text = ''
384 n = 0
385 while 1:
386 str = self.DATA[n*10:(n+1)*10]
387 if not str:
388 break
389 text += bz2d.decompress(str)
390 n += 1
391 self.assertEqual(text, self.TEXT)
392
393 def testDecompressUnusedData(self):
394 # "Test BZ2Decompressor.decompress() with unused data"
395 bz2d = BZ2Decompressor()
396 unused_data = "this is unused data"
397 text = bz2d.decompress(self.DATA+unused_data)
398 self.assertEqual(text, self.TEXT)
399 self.assertEqual(bz2d.unused_data, unused_data)
400
401 def testEOFError(self):
402 # "Calling BZ2Decompressor.decompress() after EOS must raise EOFError"
403 bz2d = BZ2Decompressor()
404 text = bz2d.decompress(self.DATA)
405 self.assertRaises(EOFError, bz2d.decompress, "anything")
406 self.assertRaises(EOFError, bz2d.decompress, "")
407
408 @bigmemtest(_4G, memuse=1.25)
409 def testBigmem(self, size):
410 # Issue #14398: decompression fails when output data is >=2GB.
411 if size < _4G:
412 self.skipTest("Test needs 5GB of memory to run.")
413 compressed = bz2.compress("a" * _4G)
414 text = bz2.BZ2Decompressor().decompress(compressed)
415 self.assertEqual(len(text), _4G)
416 self.assertEqual(text.strip("a"), "")
417
418
419class FuncTest(BaseTest):
420 "Test module functions"
421
422 def testCompress(self):
423 # "Test compress() function"
424 data = bz2.compress(self.TEXT)
425 self.assertEqual(self.decompress(data), self.TEXT)
426
427 def testCompressEmptyString(self):
428 # "Test compress() of empty string"
429 text = bz2.compress('')
430 self.assertEqual(text, self.EMPTY_DATA)
431
432 def testDecompress(self):
433 # "Test decompress() function"
434 text = bz2.decompress(self.DATA)
435 self.assertEqual(text, self.TEXT)
436
437 def testDecompressEmpty(self):
438 # "Test decompress() function with empty string"
439 text = bz2.decompress("")
440 self.assertEqual(text, "")
441
442 def testDecompressToEmptyString(self):
443 # "Test decompress() of minimal bz2 data to empty string"
444 text = bz2.decompress(self.EMPTY_DATA)
445 self.assertEqual(text, '')
446
447 def testDecompressIncomplete(self):
448 # "Test decompress() function with incomplete data"
449 self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10])
450
451 @bigmemtest(_4G, memuse=1.25)
452 def testCompressBigmem(self, size):
453 text = "a" * size
454 data = bz2.compress(text)
455 del text
456 text = self.decompress(data)
457 self.assertEqual(len(text), size)
458 self.assertEqual(text.strip("a"), "")
459
460 @bigmemtest(_4G, memuse=1.25)
461 def testDecompressBigmem(self, size):
462 # Issue #14398: decompression fails when output data is >=2GB.
463 if size < _4G:
464 self.skipTest("Test needs 5GB of memory to run.")
465 compressed = bz2.compress("a" * _4G)
466 text = bz2.decompress(compressed)
467 self.assertEqual(len(text), _4G)
468 self.assertEqual(text.strip("a"), "")
469
470def test_main():
471 test_support.run_unittest(
472 BZ2FileTest,
473 BZ2CompressorTest,
474 BZ2DecompressorTest,
475 FuncTest
476 )
477 test_support.reap_children()
478
479if __name__ == '__main__':
480 test_main()
481
482# vim:ts=4:sw=4
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