source: trunk/essentials/dev-lang/python/Lib/test/test_bz2.py@ 3951

Last change on this file since 3951 was 3225, checked in by bird, 19 years ago

Python 2.5
File size: 14.2 KB
Line 
1#!/usr/bin/python
2from test import test_support
3from test.test_support import TESTFN
4
5import unittest
6from cStringIO import StringIO
7import os
8import popen2
9import sys
10
11import bz2
12from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor
13
14has_cmdline_bunzip2 = sys.platform not in ("win32", "os2emx", "riscos")
15
16class 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
39class BZ2FileTest(BaseTest):
40 "Test BZ2File type miscellaneous 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.assertRaises(TypeError, bz2f.read, None)
63 self.assertEqual(bz2f.read(), self.TEXT)
64 bz2f.close()
65
66 def testReadChunk10(self):
67 # "Test BZ2File.read() in chunks of 10 bytes"
68 self.createTempFile()
69 bz2f = BZ2File(self.filename)
70 text = ''
71 while 1:
72 str = bz2f.read(10)
73 if not str:
74 break
75 text += str
76 self.assertEqual(text, text)
77 bz2f.close()
78
79 def testRead100(self):
80 # "Test BZ2File.read(100)"
81 self.createTempFile()
82 bz2f = BZ2File(self.filename)
83 self.assertEqual(bz2f.read(100), self.TEXT[:100])
84 bz2f.close()
85
86 def testReadLine(self):
87 # "Test BZ2File.readline()"
88 self.createTempFile()
89 bz2f = BZ2File(self.filename)
90 self.assertRaises(TypeError, bz2f.readline, None)
91 sio = StringIO(self.TEXT)
92 for line in sio.readlines():
93 self.assertEqual(bz2f.readline(), line)
94 bz2f.close()
95
96 def testReadLines(self):
97 # "Test BZ2File.readlines()"
98 self.createTempFile()
99 bz2f = BZ2File(self.filename)
100 self.assertRaises(TypeError, bz2f.readlines, None)
101 sio = StringIO(self.TEXT)
102 self.assertEqual(bz2f.readlines(), sio.readlines())
103 bz2f.close()
104
105 def testIterator(self):
106 # "Test iter(BZ2File)"
107 self.createTempFile()
108 bz2f = BZ2File(self.filename)
109 sio = StringIO(self.TEXT)
110 self.assertEqual(list(iter(bz2f)), sio.readlines())
111 bz2f.close()
112
113 def testXReadLines(self):
114 # "Test BZ2File.xreadlines()"
115 self.createTempFile()
116 bz2f = BZ2File(self.filename)
117 sio = StringIO(self.TEXT)
118 self.assertEqual(list(bz2f.xreadlines()), sio.readlines())
119 bz2f.close()
120
121 def testUniversalNewlinesLF(self):
122 # "Test BZ2File.read() with universal newlines (\\n)"
123 self.createTempFile()
124 bz2f = BZ2File(self.filename, "rU")
125 self.assertEqual(bz2f.read(), self.TEXT)
126 self.assertEqual(bz2f.newlines, "\n")
127 bz2f.close()
128
129 def testUniversalNewlinesCRLF(self):
130 # "Test BZ2File.read() with universal newlines (\\r\\n)"
131 self.createTempFile(crlf=1)
132 bz2f = BZ2File(self.filename, "rU")
133 self.assertEqual(bz2f.read(), self.TEXT)
134 self.assertEqual(bz2f.newlines, "\r\n")
135 bz2f.close()
136
137 def testWrite(self):
138 # "Test BZ2File.write()"
139 bz2f = BZ2File(self.filename, "w")
140 self.assertRaises(TypeError, bz2f.write)
141 bz2f.write(self.TEXT)
142 bz2f.close()
143 f = open(self.filename, 'rb')
144 self.assertEqual(self.decompress(f.read()), self.TEXT)
145 f.close()
146
147 def testWriteChunks10(self):
148 # "Test BZ2File.write() with chunks of 10 bytes"
149 bz2f = BZ2File(self.filename, "w")
150 n = 0
151 while 1:
152 str = self.TEXT[n*10:(n+1)*10]
153 if not str:
154 break
155 bz2f.write(str)
156 n += 1
157 bz2f.close()
158 f = open(self.filename, 'rb')
159 self.assertEqual(self.decompress(f.read()), self.TEXT)
160 f.close()
161
162 def testWriteLines(self):
163 # "Test BZ2File.writelines()"
164 bz2f = BZ2File(self.filename, "w")
165 self.assertRaises(TypeError, bz2f.writelines)
166 sio = StringIO(self.TEXT)
167 bz2f.writelines(sio.readlines())
168 bz2f.close()
169 # patch #1535500
170 self.assertRaises(ValueError, bz2f.writelines, ["a"])
171 f = open(self.filename, 'rb')
172 self.assertEqual(self.decompress(f.read()), self.TEXT)
173 f.close()
174
175 def testWriteMethodsOnReadOnlyFile(self):
176 bz2f = BZ2File(self.filename, "w")
177 bz2f.write("abc")
178 bz2f.close()
179
180 bz2f = BZ2File(self.filename, "r")
181 self.assertRaises(IOError, bz2f.write, "a")
182 self.assertRaises(IOError, bz2f.writelines, ["a"])
183
184 def testSeekForward(self):
185 # "Test BZ2File.seek(150, 0)"
186 self.createTempFile()
187 bz2f = BZ2File(self.filename)
188 self.assertRaises(TypeError, bz2f.seek)
189 bz2f.seek(150)
190 self.assertEqual(bz2f.read(), self.TEXT[150:])
191 bz2f.close()
192
193 def testSeekBackwards(self):
194 # "Test BZ2File.seek(-150, 1)"
195 self.createTempFile()
196 bz2f = BZ2File(self.filename)
197 bz2f.read(500)
198 bz2f.seek(-150, 1)
199 self.assertEqual(bz2f.read(), self.TEXT[500-150:])
200 bz2f.close()
201
202 def testSeekBackwardsFromEnd(self):
203 # "Test BZ2File.seek(-150, 2)"
204 self.createTempFile()
205 bz2f = BZ2File(self.filename)
206 bz2f.seek(-150, 2)
207 self.assertEqual(bz2f.read(), self.TEXT[len(self.TEXT)-150:])
208 bz2f.close()
209
210 def testSeekPostEnd(self):
211 # "Test BZ2File.seek(150000)"
212 self.createTempFile()
213 bz2f = BZ2File(self.filename)
214 bz2f.seek(150000)
215 self.assertEqual(bz2f.tell(), len(self.TEXT))
216 self.assertEqual(bz2f.read(), "")
217 bz2f.close()
218
219 def testSeekPostEndTwice(self):
220 # "Test BZ2File.seek(150000) twice"
221 self.createTempFile()
222 bz2f = BZ2File(self.filename)
223 bz2f.seek(150000)
224 bz2f.seek(150000)
225 self.assertEqual(bz2f.tell(), len(self.TEXT))
226 self.assertEqual(bz2f.read(), "")
227 bz2f.close()
228
229 def testSeekPreStart(self):
230 # "Test BZ2File.seek(-150, 0)"
231 self.createTempFile()
232 bz2f = BZ2File(self.filename)
233 bz2f.seek(-150)
234 self.assertEqual(bz2f.tell(), 0)
235 self.assertEqual(bz2f.read(), self.TEXT)
236 bz2f.close()
237
238 def testOpenDel(self):
239 # "Test opening and deleting a file many times"
240 self.createTempFile()
241 for i in xrange(10000):
242 o = BZ2File(self.filename)
243 del o
244
245 def testOpenNonexistent(self):
246 # "Test opening a nonexistent file"
247 self.assertRaises(IOError, BZ2File, "/non/existent")
248
249 def testModeU(self):
250 # Bug #1194181: bz2.BZ2File opened for write with mode "U"
251 self.createTempFile()
252 bz2f = BZ2File(self.filename, "U")
253 bz2f.close()
254 f = file(self.filename)
255 f.seek(0, 2)
256 self.assertEqual(f.tell(), len(self.DATA))
257 f.close()
258
259 def testBug1191043(self):
260 # readlines() for files containing no newline
261 data = 'BZh91AY&SY\xd9b\x89]\x00\x00\x00\x03\x80\x04\x00\x02\x00\x0c\x00 \x00!\x9ah3M\x13<]\xc9\x14\xe1BCe\x8a%t'
262 f = open(self.filename, "wb")
263 f.write(data)
264 f.close()
265 bz2f = BZ2File(self.filename)
266 lines = bz2f.readlines()
267 bz2f.close()
268 self.assertEqual(lines, ['Test'])
269 bz2f = BZ2File(self.filename)
270 xlines = list(bz2f.xreadlines())
271 bz2f.close()
272 self.assertEqual(xlines, ['Test'])
273
274
275class BZ2CompressorTest(BaseTest):
276 def testCompress(self):
277 # "Test BZ2Compressor.compress()/flush()"
278 bz2c = BZ2Compressor()
279 self.assertRaises(TypeError, bz2c.compress)
280 data = bz2c.compress(self.TEXT)
281 data += bz2c.flush()
282 self.assertEqual(self.decompress(data), self.TEXT)
283
284 def testCompressChunks10(self):
285 # "Test BZ2Compressor.compress()/flush() with chunks of 10 bytes"
286 bz2c = BZ2Compressor()
287 n = 0
288 data = ''
289 while 1:
290 str = self.TEXT[n*10:(n+1)*10]
291 if not str:
292 break
293 data += bz2c.compress(str)
294 n += 1
295 data += bz2c.flush()
296 self.assertEqual(self.decompress(data), self.TEXT)
297
298class BZ2DecompressorTest(BaseTest):
299 def test_Constructor(self):
300 self.assertRaises(TypeError, BZ2Decompressor, 42)
301
302 def testDecompress(self):
303 # "Test BZ2Decompressor.decompress()"
304 bz2d = BZ2Decompressor()
305 self.assertRaises(TypeError, bz2d.decompress)
306 text = bz2d.decompress(self.DATA)
307 self.assertEqual(text, self.TEXT)
308
309 def testDecompressChunks10(self):
310 # "Test BZ2Decompressor.decompress() with chunks of 10 bytes"
311 bz2d = BZ2Decompressor()
312 text = ''
313 n = 0
314 while 1:
315 str = self.DATA[n*10:(n+1)*10]
316 if not str:
317 break
318 text += bz2d.decompress(str)
319 n += 1
320 self.assertEqual(text, self.TEXT)
321
322 def testDecompressUnusedData(self):
323 # "Test BZ2Decompressor.decompress() with unused data"
324 bz2d = BZ2Decompressor()
325 unused_data = "this is unused data"
326 text = bz2d.decompress(self.DATA+unused_data)
327 self.assertEqual(text, self.TEXT)
328 self.assertEqual(bz2d.unused_data, unused_data)
329
330 def testEOFError(self):
331 # "Calling BZ2Decompressor.decompress() after EOS must raise EOFError"
332 bz2d = BZ2Decompressor()
333 text = bz2d.decompress(self.DATA)
334 self.assertRaises(EOFError, bz2d.decompress, "anything")
335
336
337class FuncTest(BaseTest):
338 "Test module functions"
339
340 def testCompress(self):
341 # "Test compress() function"
342 data = bz2.compress(self.TEXT)
343 self.assertEqual(self.decompress(data), self.TEXT)
344
345 def testDecompress(self):
346 # "Test decompress() function"
347 text = bz2.decompress(self.DATA)
348 self.assertEqual(text, self.TEXT)
349
350 def testDecompressEmpty(self):
351 # "Test decompress() function with empty string"
352 text = bz2.decompress("")
353 self.assertEqual(text, "")
354
355 def testDecompressIncomplete(self):
356 # "Test decompress() function with incomplete data"
357 self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10])
358
359def test_main():
360 test_support.run_unittest(
361 BZ2FileTest,
362 BZ2CompressorTest,
363 BZ2DecompressorTest,
364 FuncTest
365 )
366 test_support.reap_children()
367
368if __name__ == '__main__':
369 test_main()
370
371# vim:ts=4:sw=4
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