Source

pypy-postgresql / lib-python / 2.7 / test / test_bz2.py

Full commit
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
#!/usr/bin/env python
from test import test_support
from test.test_support import TESTFN, import_module

import unittest
from cStringIO import StringIO
import os
import subprocess
import sys

try:
    import threading
except ImportError:
    threading = None

bz2 = import_module('bz2')
from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor

has_cmdline_bunzip2 = sys.platform not in ("win32", "os2emx", "riscos")

class BaseTest(unittest.TestCase):
    "Base for other testcases."
    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'
    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`'
    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'

    if has_cmdline_bunzip2:
        def decompress(self, data):
            pop = subprocess.Popen("bunzip2", shell=True,
                                   stdin=subprocess.PIPE,
                                   stdout=subprocess.PIPE,
                                   stderr=subprocess.STDOUT)
            pop.stdin.write(data)
            pop.stdin.close()
            ret = pop.stdout.read()
            pop.stdout.close()
            if pop.wait() != 0:
                ret = bz2.decompress(data)
            return ret

    else:
        # bunzip2 isn't available to run on Windows.
        def decompress(self, data):
            return bz2.decompress(data)

class BZ2FileTest(BaseTest):
    "Test BZ2File type miscellaneous methods."

    def setUp(self):
        self.filename = TESTFN

    def tearDown(self):
        test_support.gc_collect()
        if os.path.isfile(self.filename):
            os.unlink(self.filename)

    def createTempFile(self, crlf=0):
        with open(self.filename, "wb") as f:
            if crlf:
                data = self.DATA_CRLF
            else:
                data = self.DATA
            f.write(data)

    def testRead(self):
        # "Test BZ2File.read()"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            self.assertRaises(TypeError, bz2f.read, None)
            self.assertEqual(bz2f.read(), self.TEXT)

    def testRead0(self):
        # Test BBZ2File.read(0)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            self.assertRaises(TypeError, bz2f.read, None)
            self.assertEqual(bz2f.read(0), "")

    def testReadChunk10(self):
        # "Test BZ2File.read() in chunks of 10 bytes"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            text = ''
            while 1:
                str = bz2f.read(10)
                if not str:
                    break
                text += str
            self.assertEqual(text, self.TEXT)

    def testRead100(self):
        # "Test BZ2File.read(100)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            self.assertEqual(bz2f.read(100), self.TEXT[:100])

    def testReadLine(self):
        # "Test BZ2File.readline()"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            self.assertRaises(TypeError, bz2f.readline, None)
            sio = StringIO(self.TEXT)
            for line in sio.readlines():
                self.assertEqual(bz2f.readline(), line)

    def testReadLines(self):
        # "Test BZ2File.readlines()"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            self.assertRaises(TypeError, bz2f.readlines, None)
            sio = StringIO(self.TEXT)
            self.assertEqual(bz2f.readlines(), sio.readlines())

    def testIterator(self):
        # "Test iter(BZ2File)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            sio = StringIO(self.TEXT)
            self.assertEqual(list(iter(bz2f)), sio.readlines())

    def testClosedIteratorDeadlock(self):
        # "Test that iteration on a closed bz2file releases the lock."
        # http://bugs.python.org/issue3309
        self.createTempFile()
        bz2f = BZ2File(self.filename)
        bz2f.close()
        self.assertRaises(ValueError, bz2f.next)
        # This call will deadlock of the above .next call failed to
        # release the lock.
        self.assertRaises(ValueError, bz2f.readlines)

    def testXReadLines(self):
        # "Test BZ2File.xreadlines()"
        self.createTempFile()
        bz2f = BZ2File(self.filename)
        sio = StringIO(self.TEXT)
        self.assertEqual(list(bz2f.xreadlines()), sio.readlines())
        bz2f.close()

    def testUniversalNewlinesLF(self):
        # "Test BZ2File.read() with universal newlines (\\n)"
        self.createTempFile()
        bz2f = BZ2File(self.filename, "rU")
        self.assertEqual(bz2f.read(), self.TEXT)
        self.assertEqual(bz2f.newlines, "\n")
        bz2f.close()

    def testUniversalNewlinesCRLF(self):
        # "Test BZ2File.read() with universal newlines (\\r\\n)"
        self.createTempFile(crlf=1)
        bz2f = BZ2File(self.filename, "rU")
        self.assertEqual(bz2f.read(), self.TEXT)
        self.assertEqual(bz2f.newlines, "\r\n")
        bz2f.close()

    def testWrite(self):
        # "Test BZ2File.write()"
        with BZ2File(self.filename, "w") as bz2f:
            self.assertRaises(TypeError, bz2f.write)
            bz2f.write(self.TEXT)
        with open(self.filename, 'rb') as f:
            self.assertEqual(self.decompress(f.read()), self.TEXT)

    def testWriteChunks10(self):
        # "Test BZ2File.write() with chunks of 10 bytes"
        with BZ2File(self.filename, "w") as bz2f:
            n = 0
            while 1:
                str = self.TEXT[n*10:(n+1)*10]
                if not str:
                    break
                bz2f.write(str)
                n += 1
        with open(self.filename, 'rb') as f:
            self.assertEqual(self.decompress(f.read()), self.TEXT)

    def testWriteLines(self):
        # "Test BZ2File.writelines()"
        with BZ2File(self.filename, "w") as bz2f:
            self.assertRaises(TypeError, bz2f.writelines)
            sio = StringIO(self.TEXT)
            bz2f.writelines(sio.readlines())
        # patch #1535500
        self.assertRaises(ValueError, bz2f.writelines, ["a"])
        with open(self.filename, 'rb') as f:
            self.assertEqual(self.decompress(f.read()), self.TEXT)

    def testWriteMethodsOnReadOnlyFile(self):
        with BZ2File(self.filename, "w") as bz2f:
            bz2f.write("abc")

        with BZ2File(self.filename, "r") as bz2f:
            self.assertRaises(IOError, bz2f.write, "a")
            self.assertRaises(IOError, bz2f.writelines, ["a"])

    def testSeekForward(self):
        # "Test BZ2File.seek(150, 0)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            self.assertRaises(TypeError, bz2f.seek)
            bz2f.seek(150)
            self.assertEqual(bz2f.read(), self.TEXT[150:])

    def testSeekBackwards(self):
        # "Test BZ2File.seek(-150, 1)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            bz2f.read(500)
            bz2f.seek(-150, 1)
            self.assertEqual(bz2f.read(), self.TEXT[500-150:])

    def testSeekBackwardsFromEnd(self):
        # "Test BZ2File.seek(-150, 2)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            bz2f.seek(-150, 2)
            self.assertEqual(bz2f.read(), self.TEXT[len(self.TEXT)-150:])

    def testSeekPostEnd(self):
        # "Test BZ2File.seek(150000)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            bz2f.seek(150000)
            self.assertEqual(bz2f.tell(), len(self.TEXT))
            self.assertEqual(bz2f.read(), "")

    def testSeekPostEndTwice(self):
        # "Test BZ2File.seek(150000) twice"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            bz2f.seek(150000)
            bz2f.seek(150000)
            self.assertEqual(bz2f.tell(), len(self.TEXT))
            self.assertEqual(bz2f.read(), "")

    def testSeekPreStart(self):
        # "Test BZ2File.seek(-150, 0)"
        self.createTempFile()
        with BZ2File(self.filename) as bz2f:
            bz2f.seek(-150)
            self.assertEqual(bz2f.tell(), 0)
            self.assertEqual(bz2f.read(), self.TEXT)

    def testOpenDel(self):
        # "Test opening and deleting a file many times"
        self.createTempFile()
        for i in xrange(10000):
            o = BZ2File(self.filename)
            del o
            if i % 100 == 0:
                test_support.gc_collect()

    def testOpenNonexistent(self):
        # "Test opening a nonexistent file"
        self.assertRaises(IOError, BZ2File, "/non/existent")

    def testModeU(self):
        # Bug #1194181: bz2.BZ2File opened for write with mode "U"
        self.createTempFile()
        bz2f = BZ2File(self.filename, "U")
        bz2f.close()
        f = file(self.filename)
        f.seek(0, 2)
        self.assertEqual(f.tell(), len(self.DATA))
        f.close()

    def testBug1191043(self):
        # readlines() for files containing no newline
        data = 'BZh91AY&SY\xd9b\x89]\x00\x00\x00\x03\x80\x04\x00\x02\x00\x0c\x00 \x00!\x9ah3M\x13<]\xc9\x14\xe1BCe\x8a%t'
        with open(self.filename, "wb") as f:
            f.write(data)
        with BZ2File(self.filename) as bz2f:
            lines = bz2f.readlines()
        self.assertEqual(lines, ['Test'])
        with BZ2File(self.filename) as bz2f:
            xlines = list(bz2f.readlines())
        self.assertEqual(xlines, ['Test'])

    def testContextProtocol(self):
        # BZ2File supports the context management protocol
        f = None
        with BZ2File(self.filename, "wb") as f:
            f.write(b"xxx")
        f = BZ2File(self.filename, "rb")
        f.close()
        try:
            with f:
                pass
        except ValueError:
            pass
        else:
            self.fail("__enter__ on a closed file didn't raise an exception")
        try:
            with BZ2File(self.filename, "wb") as f:
                1 // 0
        except ZeroDivisionError:
            pass
        else:
            self.fail("1 // 0 didn't raise an exception")

    @unittest.skipUnless(threading, 'Threading required for this test.')
    def testThreading(self):
        # Using a BZ2File from several threads doesn't deadlock (issue #7205).
        data = "1" * 2**20
        nthreads = 10
        with bz2.BZ2File(self.filename, 'wb') as f:
            def comp():
                for i in range(5):
                    f.write(data)
            threads = [threading.Thread(target=comp) for i in range(nthreads)]
            for t in threads:
                t.start()
            for t in threads:
                t.join()

    @test_support.impl_detail()
    def testMixedIterationReads(self):
        # Issue #8397: mixed iteration and reads should be forbidden.
        with bz2.BZ2File(self.filename, 'wb') as f:
            # The internal buffer size is hard-wired to 8192 bytes, we must
            # write out more than that for the test to stop half through
            # the buffer.
            f.write(self.TEXT * 100)
        with bz2.BZ2File(self.filename, 'rb') as f:
            next(f)
            self.assertRaises(ValueError, f.read)
            self.assertRaises(ValueError, f.readline)
            self.assertRaises(ValueError, f.readlines)

class BZ2CompressorTest(BaseTest):
    def testCompress(self):
        # "Test BZ2Compressor.compress()/flush()"
        bz2c = BZ2Compressor()
        self.assertRaises(TypeError, bz2c.compress)
        data = bz2c.compress(self.TEXT)
        data += bz2c.flush()
        self.assertEqual(self.decompress(data), self.TEXT)

    def testCompressChunks10(self):
        # "Test BZ2Compressor.compress()/flush() with chunks of 10 bytes"
        bz2c = BZ2Compressor()
        n = 0
        data = ''
        while 1:
            str = self.TEXT[n*10:(n+1)*10]
            if not str:
                break
            data += bz2c.compress(str)
            n += 1
        data += bz2c.flush()
        self.assertEqual(self.decompress(data), self.TEXT)

class BZ2DecompressorTest(BaseTest):
    def test_Constructor(self):
        self.assertRaises(TypeError, BZ2Decompressor, 42)

    def testDecompress(self):
        # "Test BZ2Decompressor.decompress()"
        bz2d = BZ2Decompressor()
        self.assertRaises(TypeError, bz2d.decompress)
        text = bz2d.decompress(self.DATA)
        self.assertEqual(text, self.TEXT)

    def testDecompressChunks10(self):
        # "Test BZ2Decompressor.decompress() with chunks of 10 bytes"
        bz2d = BZ2Decompressor()
        text = ''
        n = 0
        while 1:
            str = self.DATA[n*10:(n+1)*10]
            if not str:
                break
            text += bz2d.decompress(str)
            n += 1
        self.assertEqual(text, self.TEXT)

    def testDecompressUnusedData(self):
        # "Test BZ2Decompressor.decompress() with unused data"
        bz2d = BZ2Decompressor()
        unused_data = "this is unused data"
        text = bz2d.decompress(self.DATA+unused_data)
        self.assertEqual(text, self.TEXT)
        self.assertEqual(bz2d.unused_data, unused_data)

    def testEOFError(self):
        # "Calling BZ2Decompressor.decompress() after EOS must raise EOFError"
        bz2d = BZ2Decompressor()
        text = bz2d.decompress(self.DATA)
        self.assertRaises(EOFError, bz2d.decompress, "anything")


class FuncTest(BaseTest):
    "Test module functions"

    def testCompress(self):
        # "Test compress() function"
        data = bz2.compress(self.TEXT)
        self.assertEqual(self.decompress(data), self.TEXT)

    def testDecompress(self):
        # "Test decompress() function"
        text = bz2.decompress(self.DATA)
        self.assertEqual(text, self.TEXT)

    def testDecompressEmpty(self):
        # "Test decompress() function with empty string"
        text = bz2.decompress("")
        self.assertEqual(text, "")

    def testDecompressIncomplete(self):
        # "Test decompress() function with incomplete data"
        self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10])

def test_main():
    test_support.run_unittest(
        BZ2FileTest,
        BZ2CompressorTest,
        BZ2DecompressorTest,
        FuncTest
    )
    test_support.reap_children()

if __name__ == '__main__':
    test_main()

# vim:ts=4:sw=4