#!/usr/bin/env python from test import test_support from test.test_support import TESTFN, _4G, bigmemtest, import_module, findfile 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$\x11\xa4i4\xf14S\xd2\x88\xe5\xcd9gd6\x0b\n\xe9\x9b\xd5\x8a\x99\xf7\x08.K\x8ev\xfb\xf7xw\xbb\xdf\xa1\x92\xf1\xdd|/";\xa2\xba\x9f\xd5\xb1#A\xb6\xf6\xb3o\xc9\xc5y\\\xebO\xe7\x85\x9a\xbc\xb6f8\x952\xd5\xd7"%\x89>V,\xf7\xa6z\xe2\x9f\xa3\xdf\x11\x11"\xd6E)I\xa9\x13^\xca\xf3r\xd0\x03U\x922\xf26\xec\xb6\xed\x8b\xc3U\x13\x9d\xc5\x170\xa4\xfa^\x92\xacDF\x8a\x97\xd6\x19\xfe\xdd\xb8\xbd\x1a\x9a\x19\xa3\x80ankR\x8b\xe5\xd83]\xa9\xc6\x08\x82f\xf6\xb9"6l$\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\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' EMPTY_DATA = 'BZh9\x17rE8P\x90\x00\x00\x00\x00' with open(findfile("testbz2_bigmem.bz2"), "rb") as f: DATA_BIGMEM = f.read() 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): 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 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() 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) def test_read_truncated(self): # Drop the eos_magic field (6 bytes) and CRC (4 bytes). truncated = self.DATA[:-10] with open(self.filename, 'wb') as f: f.write(truncated) with BZ2File(self.filename) as f: self.assertRaises(EOFError, f.read) with BZ2File(self.filename) as f: self.assertEqual(f.read(len(self.TEXT)), self.TEXT) self.assertRaises(EOFError, f.read, 1) # Incomplete 4-byte file header, and block header of at least 146 bits. for i in range(22): with open(self.filename, 'wb') as f: f.write(truncated[:i]) with BZ2File(self.filename) as f: self.assertRaises(EOFError, f.read, 1) 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 testCompressEmptyString(self): # "Test BZ2Compressor.compress()/flush() of empty string" bz2c = BZ2Compressor() data = bz2c.compress('') data += bz2c.flush() self.assertEqual(data, self.EMPTY_DATA) 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) @bigmemtest(_4G, memuse=1.25) def testBigmem(self, size): text = "a" * size bz2c = bz2.BZ2Compressor() data = bz2c.compress(text) + bz2c.flush() del text text = self.decompress(data) self.assertEqual(len(text), size) self.assertEqual(text.strip("a"), "") 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") self.assertRaises(EOFError, bz2d.decompress, "") @bigmemtest(_4G, memuse=1.25) def testBigmem(self, size): # Issue #14398: decompression fails when output data is >=2GB. if size < _4G: self.skipTest("Test needs 5GB of memory to run.") text = bz2.BZ2Decompressor().decompress(self.DATA_BIGMEM) self.assertEqual(len(text), _4G) self.assertEqual(text.strip("\0"), "") 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 testCompressEmptyString(self): # "Test compress() of empty string" text = bz2.compress('') self.assertEqual(text, self.EMPTY_DATA) 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 testDecompressToEmptyString(self): # "Test decompress() of minimal bz2 data to empty string" text = bz2.decompress(self.EMPTY_DATA) self.assertEqual(text, '') def testDecompressIncomplete(self): # "Test decompress() function with incomplete data" self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10]) @bigmemtest(_4G, memuse=1.25) def testCompressBigmem(self, size): text = "a" * size data = bz2.compress(text) del text text = self.decompress(data) self.assertEqual(len(text), size) self.assertEqual(text.strip("a"), "") @bigmemtest(_4G, memuse=1.25) def testDecompressBigmem(self, size): # Issue #14398: decompression fails when output data is >=2GB. if size < _4G: self.skipTest("Test needs 5GB of memory to run.") text = bz2.decompress(self.DATA_BIGMEM) self.assertEqual(len(text), _4G) self.assertEqual(text.strip("\0"), "") 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