| from test import support |
| from test.support import bigmemtest, _4G |
| |
| import unittest |
| from io import BytesIO, DEFAULT_BUFFER_SIZE |
| import os |
| import pickle |
| import glob |
| import pathlib |
| import random |
| import shutil |
| import subprocess |
| import sys |
| from test.support import unlink |
| import _compression |
| |
| try: |
| import threading |
| except ImportError: |
| threading = None |
| |
| # Skip tests if the bz2 module doesn't exist. |
| bz2 = support.import_module('bz2') |
| from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor |
| |
| has_cmdline_bunzip2 = None |
| |
| def ext_decompress(data): |
| global has_cmdline_bunzip2 |
| if has_cmdline_bunzip2 is None: |
| has_cmdline_bunzip2 = bool(shutil.which('bunzip2')) |
| if has_cmdline_bunzip2: |
| return subprocess.check_output(['bunzip2'], input=data) |
| else: |
| return bz2.decompress(data) |
| |
| class BaseTest(unittest.TestCase): |
| "Base for other testcases." |
| |
| TEXT_LINES = [ |
| b'root:x:0:0:root:/root:/bin/bash\n', |
| b'bin:x:1:1:bin:/bin:\n', |
| b'daemon:x:2:2:daemon:/sbin:\n', |
| b'adm:x:3:4:adm:/var/adm:\n', |
| b'lp:x:4:7:lp:/var/spool/lpd:\n', |
| b'sync:x:5:0:sync:/sbin:/bin/sync\n', |
| b'shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown\n', |
| b'halt:x:7:0:halt:/sbin:/sbin/halt\n', |
| b'mail:x:8:12:mail:/var/spool/mail:\n', |
| b'news:x:9:13:news:/var/spool/news:\n', |
| b'uucp:x:10:14:uucp:/var/spool/uucp:\n', |
| b'operator:x:11:0:operator:/root:\n', |
| b'games:x:12:100:games:/usr/games:\n', |
| b'gopher:x:13:30:gopher:/usr/lib/gopher-data:\n', |
| b'ftp:x:14:50:FTP User:/var/ftp:/bin/bash\n', |
| b'nobody:x:65534:65534:Nobody:/home:\n', |
| b'postfix:x:100:101:postfix:/var/spool/postfix:\n', |
| b'niemeyer:x:500:500::/home/niemeyer:/bin/bash\n', |
| b'postgres:x:101:102:PostgreSQL Server:/var/lib/pgsql:/bin/bash\n', |
| b'mysql:x:102:103:MySQL server:/var/lib/mysql:/bin/bash\n', |
| b'www:x:103:104::/var/www:/bin/false\n', |
| ] |
| TEXT = b''.join(TEXT_LINES) |
| DATA = b'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`' |
| EMPTY_DATA = b'BZh9\x17rE8P\x90\x00\x00\x00\x00' |
| BAD_DATA = b'this is not a valid bzip2 file' |
| |
| # Some tests need more than one block of uncompressed data. Since one block |
| # is at least 100 kB, we gather some data dynamically and compress it. |
| # Note that this assumes that compression works correctly, so we cannot |
| # simply use the bigger test data for all tests. |
| test_size = 0 |
| BIG_TEXT = bytearray(128*1024) |
| for fname in glob.glob(os.path.join(os.path.dirname(__file__), '*.py')): |
| with open(fname, 'rb') as fh: |
| test_size += fh.readinto(memoryview(BIG_TEXT)[test_size:]) |
| if test_size > 128*1024: |
| break |
| BIG_DATA = bz2.compress(BIG_TEXT, compresslevel=1) |
| |
| def setUp(self): |
| self.filename = support.TESTFN |
| |
| def tearDown(self): |
| if os.path.isfile(self.filename): |
| os.unlink(self.filename) |
| |
| |
| class BZ2FileTest(BaseTest): |
| "Test the BZ2File class." |
| |
| def createTempFile(self, streams=1, suffix=b""): |
| with open(self.filename, "wb") as f: |
| f.write(self.DATA * streams) |
| f.write(suffix) |
| |
| def testBadArgs(self): |
| self.assertRaises(TypeError, BZ2File, 123.456) |
| self.assertRaises(ValueError, BZ2File, os.devnull, "z") |
| self.assertRaises(ValueError, BZ2File, os.devnull, "rx") |
| self.assertRaises(ValueError, BZ2File, os.devnull, "rbt") |
| self.assertRaises(ValueError, BZ2File, os.devnull, compresslevel=0) |
| self.assertRaises(ValueError, BZ2File, os.devnull, compresslevel=10) |
| |
| def testRead(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.read, float()) |
| self.assertEqual(bz2f.read(), self.TEXT) |
| |
| def testReadBadFile(self): |
| self.createTempFile(streams=0, suffix=self.BAD_DATA) |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(OSError, bz2f.read) |
| |
| def testReadMultiStream(self): |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.read, float()) |
| self.assertEqual(bz2f.read(), self.TEXT * 5) |
| |
| def testReadMonkeyMultiStream(self): |
| # Test BZ2File.read() on a multi-stream archive where a stream |
| # boundary coincides with the end of the raw read buffer. |
| buffer_size = _compression.BUFFER_SIZE |
| _compression.BUFFER_SIZE = len(self.DATA) |
| try: |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.read, float()) |
| self.assertEqual(bz2f.read(), self.TEXT * 5) |
| finally: |
| _compression.BUFFER_SIZE = buffer_size |
| |
| def testReadTrailingJunk(self): |
| self.createTempFile(suffix=self.BAD_DATA) |
| with BZ2File(self.filename) as bz2f: |
| self.assertEqual(bz2f.read(), self.TEXT) |
| |
| def testReadMultiStreamTrailingJunk(self): |
| self.createTempFile(streams=5, suffix=self.BAD_DATA) |
| with BZ2File(self.filename) as bz2f: |
| self.assertEqual(bz2f.read(), self.TEXT * 5) |
| |
| def testRead0(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.read, float()) |
| self.assertEqual(bz2f.read(0), b"") |
| |
| def testReadChunk10(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| text = b'' |
| while True: |
| str = bz2f.read(10) |
| if not str: |
| break |
| text += str |
| self.assertEqual(text, self.TEXT) |
| |
| def testReadChunk10MultiStream(self): |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| text = b'' |
| while True: |
| str = bz2f.read(10) |
| if not str: |
| break |
| text += str |
| self.assertEqual(text, self.TEXT * 5) |
| |
| def testRead100(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| self.assertEqual(bz2f.read(100), self.TEXT[:100]) |
| |
| def testPeek(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| pdata = bz2f.peek() |
| self.assertNotEqual(len(pdata), 0) |
| self.assertTrue(self.TEXT.startswith(pdata)) |
| self.assertEqual(bz2f.read(), self.TEXT) |
| |
| def testReadInto(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| n = 128 |
| b = bytearray(n) |
| self.assertEqual(bz2f.readinto(b), n) |
| self.assertEqual(b, self.TEXT[:n]) |
| n = len(self.TEXT) - n |
| b = bytearray(len(self.TEXT)) |
| self.assertEqual(bz2f.readinto(b), n) |
| self.assertEqual(b[:n], self.TEXT[-n:]) |
| |
| def testReadLine(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.readline, None) |
| for line in self.TEXT_LINES: |
| self.assertEqual(bz2f.readline(), line) |
| |
| def testReadLineMultiStream(self): |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.readline, None) |
| for line in self.TEXT_LINES * 5: |
| self.assertEqual(bz2f.readline(), line) |
| |
| def testReadLines(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.readlines, None) |
| self.assertEqual(bz2f.readlines(), self.TEXT_LINES) |
| |
| def testReadLinesMultiStream(self): |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.readlines, None) |
| self.assertEqual(bz2f.readlines(), self.TEXT_LINES * 5) |
| |
| def testIterator(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| self.assertEqual(list(iter(bz2f)), self.TEXT_LINES) |
| |
| def testIteratorMultiStream(self): |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| self.assertEqual(list(iter(bz2f)), self.TEXT_LINES * 5) |
| |
| def testClosedIteratorDeadlock(self): |
| # Issue #3309: Iteration on a closed BZ2File should release the lock. |
| self.createTempFile() |
| bz2f = BZ2File(self.filename) |
| bz2f.close() |
| self.assertRaises(ValueError, next, bz2f) |
| # This call will deadlock if the above call failed to release the lock. |
| self.assertRaises(ValueError, bz2f.readlines) |
| |
| def testWrite(self): |
| 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(ext_decompress(f.read()), self.TEXT) |
| |
| def testWriteChunks10(self): |
| with BZ2File(self.filename, "w") as bz2f: |
| n = 0 |
| while True: |
| 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(ext_decompress(f.read()), self.TEXT) |
| |
| def testWriteNonDefaultCompressLevel(self): |
| expected = bz2.compress(self.TEXT, compresslevel=5) |
| with BZ2File(self.filename, "w", compresslevel=5) as bz2f: |
| bz2f.write(self.TEXT) |
| with open(self.filename, "rb") as f: |
| self.assertEqual(f.read(), expected) |
| |
| def testWriteLines(self): |
| with BZ2File(self.filename, "w") as bz2f: |
| self.assertRaises(TypeError, bz2f.writelines) |
| bz2f.writelines(self.TEXT_LINES) |
| # Issue #1535500: Calling writelines() on a closed BZ2File |
| # should raise an exception. |
| self.assertRaises(ValueError, bz2f.writelines, ["a"]) |
| with open(self.filename, 'rb') as f: |
| self.assertEqual(ext_decompress(f.read()), self.TEXT) |
| |
| def testWriteMethodsOnReadOnlyFile(self): |
| with BZ2File(self.filename, "w") as bz2f: |
| bz2f.write(b"abc") |
| |
| with BZ2File(self.filename, "r") as bz2f: |
| self.assertRaises(OSError, bz2f.write, b"a") |
| self.assertRaises(OSError, bz2f.writelines, [b"a"]) |
| |
| def testAppend(self): |
| with BZ2File(self.filename, "w") as bz2f: |
| self.assertRaises(TypeError, bz2f.write) |
| bz2f.write(self.TEXT) |
| with BZ2File(self.filename, "a") as bz2f: |
| self.assertRaises(TypeError, bz2f.write) |
| bz2f.write(self.TEXT) |
| with open(self.filename, 'rb') as f: |
| self.assertEqual(ext_decompress(f.read()), self.TEXT * 2) |
| |
| def testSeekForward(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.seek) |
| bz2f.seek(150) |
| self.assertEqual(bz2f.read(), self.TEXT[150:]) |
| |
| def testSeekForwardAcrossStreams(self): |
| self.createTempFile(streams=2) |
| with BZ2File(self.filename) as bz2f: |
| self.assertRaises(TypeError, bz2f.seek) |
| bz2f.seek(len(self.TEXT) + 150) |
| self.assertEqual(bz2f.read(), self.TEXT[150:]) |
| |
| def testSeekBackwards(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| bz2f.read(500) |
| bz2f.seek(-150, 1) |
| self.assertEqual(bz2f.read(), self.TEXT[500-150:]) |
| |
| def testSeekBackwardsAcrossStreams(self): |
| self.createTempFile(streams=2) |
| with BZ2File(self.filename) as bz2f: |
| readto = len(self.TEXT) + 100 |
| while readto > 0: |
| readto -= len(bz2f.read(readto)) |
| bz2f.seek(-150, 1) |
| self.assertEqual(bz2f.read(), self.TEXT[100-150:] + self.TEXT) |
| |
| def testSeekBackwardsFromEnd(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| bz2f.seek(-150, 2) |
| self.assertEqual(bz2f.read(), self.TEXT[len(self.TEXT)-150:]) |
| |
| def testSeekBackwardsFromEndAcrossStreams(self): |
| self.createTempFile(streams=2) |
| with BZ2File(self.filename) as bz2f: |
| bz2f.seek(-1000, 2) |
| self.assertEqual(bz2f.read(), (self.TEXT * 2)[-1000:]) |
| |
| def testSeekPostEnd(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| bz2f.seek(150000) |
| self.assertEqual(bz2f.tell(), len(self.TEXT)) |
| self.assertEqual(bz2f.read(), b"") |
| |
| def testSeekPostEndMultiStream(self): |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| bz2f.seek(150000) |
| self.assertEqual(bz2f.tell(), len(self.TEXT) * 5) |
| self.assertEqual(bz2f.read(), b"") |
| |
| def testSeekPostEndTwice(self): |
| 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(), b"") |
| |
| def testSeekPostEndTwiceMultiStream(self): |
| self.createTempFile(streams=5) |
| with BZ2File(self.filename) as bz2f: |
| bz2f.seek(150000) |
| bz2f.seek(150000) |
| self.assertEqual(bz2f.tell(), len(self.TEXT) * 5) |
| self.assertEqual(bz2f.read(), b"") |
| |
| def testSeekPreStart(self): |
| self.createTempFile() |
| with BZ2File(self.filename) as bz2f: |
| bz2f.seek(-150) |
| self.assertEqual(bz2f.tell(), 0) |
| self.assertEqual(bz2f.read(), self.TEXT) |
| |
| def testSeekPreStartMultiStream(self): |
| self.createTempFile(streams=2) |
| with BZ2File(self.filename) as bz2f: |
| bz2f.seek(-150) |
| self.assertEqual(bz2f.tell(), 0) |
| self.assertEqual(bz2f.read(), self.TEXT * 2) |
| |
| def testFileno(self): |
| self.createTempFile() |
| with open(self.filename, 'rb') as rawf: |
| bz2f = BZ2File(rawf) |
| try: |
| self.assertEqual(bz2f.fileno(), rawf.fileno()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.fileno) |
| |
| def testSeekable(self): |
| bz2f = BZ2File(BytesIO(self.DATA)) |
| try: |
| self.assertTrue(bz2f.seekable()) |
| bz2f.read() |
| self.assertTrue(bz2f.seekable()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.seekable) |
| |
| bz2f = BZ2File(BytesIO(), "w") |
| try: |
| self.assertFalse(bz2f.seekable()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.seekable) |
| |
| src = BytesIO(self.DATA) |
| src.seekable = lambda: False |
| bz2f = BZ2File(src) |
| try: |
| self.assertFalse(bz2f.seekable()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.seekable) |
| |
| def testReadable(self): |
| bz2f = BZ2File(BytesIO(self.DATA)) |
| try: |
| self.assertTrue(bz2f.readable()) |
| bz2f.read() |
| self.assertTrue(bz2f.readable()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.readable) |
| |
| bz2f = BZ2File(BytesIO(), "w") |
| try: |
| self.assertFalse(bz2f.readable()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.readable) |
| |
| def testWritable(self): |
| bz2f = BZ2File(BytesIO(self.DATA)) |
| try: |
| self.assertFalse(bz2f.writable()) |
| bz2f.read() |
| self.assertFalse(bz2f.writable()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.writable) |
| |
| bz2f = BZ2File(BytesIO(), "w") |
| try: |
| self.assertTrue(bz2f.writable()) |
| finally: |
| bz2f.close() |
| self.assertRaises(ValueError, bz2f.writable) |
| |
| def testOpenDel(self): |
| self.createTempFile() |
| for i in range(10000): |
| o = BZ2File(self.filename) |
| del o |
| |
| def testOpenNonexistent(self): |
| self.assertRaises(OSError, BZ2File, "/non/existent") |
| |
| def testReadlinesNoNewline(self): |
| # Issue #1191043: readlines() fails on a file containing no newline. |
| data = b'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, [b'Test']) |
| with BZ2File(self.filename) as bz2f: |
| xlines = list(bz2f.readlines()) |
| self.assertEqual(xlines, [b'Test']) |
| |
| def testContextProtocol(self): |
| 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): |
| # Issue #7205: Using a BZ2File from several threads shouldn't deadlock. |
| data = b"1" * 2**20 |
| nthreads = 10 |
| with 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)] |
| with support.start_threads(threads): |
| pass |
| |
| def testWithoutThreading(self): |
| module = support.import_fresh_module("bz2", blocked=("threading",)) |
| with module.BZ2File(self.filename, "wb") as f: |
| f.write(b"abc") |
| with module.BZ2File(self.filename, "rb") as f: |
| self.assertEqual(f.read(), b"abc") |
| |
| def testMixedIterationAndReads(self): |
| self.createTempFile() |
| linelen = len(self.TEXT_LINES[0]) |
| halflen = linelen // 2 |
| with BZ2File(self.filename) as bz2f: |
| bz2f.read(halflen) |
| self.assertEqual(next(bz2f), self.TEXT_LINES[0][halflen:]) |
| self.assertEqual(bz2f.read(), self.TEXT[linelen:]) |
| with BZ2File(self.filename) as bz2f: |
| bz2f.readline() |
| self.assertEqual(next(bz2f), self.TEXT_LINES[1]) |
| self.assertEqual(bz2f.readline(), self.TEXT_LINES[2]) |
| with BZ2File(self.filename) as bz2f: |
| bz2f.readlines() |
| self.assertRaises(StopIteration, next, bz2f) |
| self.assertEqual(bz2f.readlines(), []) |
| |
| def testMultiStreamOrdering(self): |
| # Test the ordering of streams when reading a multi-stream archive. |
| data1 = b"foo" * 1000 |
| data2 = b"bar" * 1000 |
| with BZ2File(self.filename, "w") as bz2f: |
| bz2f.write(data1) |
| with BZ2File(self.filename, "a") as bz2f: |
| bz2f.write(data2) |
| with BZ2File(self.filename) as bz2f: |
| self.assertEqual(bz2f.read(), data1 + data2) |
| |
| def testOpenBytesFilename(self): |
| str_filename = self.filename |
| try: |
| bytes_filename = str_filename.encode("ascii") |
| except UnicodeEncodeError: |
| self.skipTest("Temporary file name needs to be ASCII") |
| with BZ2File(bytes_filename, "wb") as f: |
| f.write(self.DATA) |
| with BZ2File(bytes_filename, "rb") as f: |
| self.assertEqual(f.read(), self.DATA) |
| # Sanity check that we are actually operating on the right file. |
| with BZ2File(str_filename, "rb") as f: |
| self.assertEqual(f.read(), self.DATA) |
| |
| def testOpenPathLikeFilename(self): |
| filename = pathlib.Path(self.filename) |
| with BZ2File(filename, "wb") as f: |
| f.write(self.DATA) |
| with BZ2File(filename, "rb") as f: |
| self.assertEqual(f.read(), self.DATA) |
| |
| def testDecompressLimited(self): |
| """Decompressed data buffering should be limited""" |
| bomb = bz2.compress(b'\0' * int(2e6), compresslevel=9) |
| self.assertLess(len(bomb), _compression.BUFFER_SIZE) |
| |
| decomp = BZ2File(BytesIO(bomb)) |
| self.assertEqual(decomp.read(1), b'\0') |
| max_decomp = 1 + DEFAULT_BUFFER_SIZE |
| self.assertLessEqual(decomp._buffer.raw.tell(), max_decomp, |
| "Excessive amount of data was decompressed") |
| |
| |
| # Tests for a BZ2File wrapping another file object: |
| |
| def testReadBytesIO(self): |
| with BytesIO(self.DATA) as bio: |
| with BZ2File(bio) as bz2f: |
| self.assertRaises(TypeError, bz2f.read, float()) |
| self.assertEqual(bz2f.read(), self.TEXT) |
| self.assertFalse(bio.closed) |
| |
| def testPeekBytesIO(self): |
| with BytesIO(self.DATA) as bio: |
| with BZ2File(bio) as bz2f: |
| pdata = bz2f.peek() |
| self.assertNotEqual(len(pdata), 0) |
| self.assertTrue(self.TEXT.startswith(pdata)) |
| self.assertEqual(bz2f.read(), self.TEXT) |
| |
| def testWriteBytesIO(self): |
| with BytesIO() as bio: |
| with BZ2File(bio, "w") as bz2f: |
| self.assertRaises(TypeError, bz2f.write) |
| bz2f.write(self.TEXT) |
| self.assertEqual(ext_decompress(bio.getvalue()), self.TEXT) |
| self.assertFalse(bio.closed) |
| |
| def testSeekForwardBytesIO(self): |
| with BytesIO(self.DATA) as bio: |
| with BZ2File(bio) as bz2f: |
| self.assertRaises(TypeError, bz2f.seek) |
| bz2f.seek(150) |
| self.assertEqual(bz2f.read(), self.TEXT[150:]) |
| |
| def testSeekBackwardsBytesIO(self): |
| with BytesIO(self.DATA) as bio: |
| with BZ2File(bio) as bz2f: |
| bz2f.read(500) |
| bz2f.seek(-150, 1) |
| self.assertEqual(bz2f.read(), self.TEXT[500-150:]) |
| |
| def test_read_truncated(self): |
| # Drop the eos_magic field (6 bytes) and CRC (4 bytes). |
| truncated = self.DATA[:-10] |
| with BZ2File(BytesIO(truncated)) as f: |
| self.assertRaises(EOFError, f.read) |
| with BZ2File(BytesIO(truncated)) 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 BZ2File(BytesIO(truncated[:i])) as f: |
| self.assertRaises(EOFError, f.read, 1) |
| |
| |
| class BZ2CompressorTest(BaseTest): |
| def testCompress(self): |
| bz2c = BZ2Compressor() |
| self.assertRaises(TypeError, bz2c.compress) |
| data = bz2c.compress(self.TEXT) |
| data += bz2c.flush() |
| self.assertEqual(ext_decompress(data), self.TEXT) |
| |
| def testCompressEmptyString(self): |
| bz2c = BZ2Compressor() |
| data = bz2c.compress(b'') |
| data += bz2c.flush() |
| self.assertEqual(data, self.EMPTY_DATA) |
| |
| def testCompressChunks10(self): |
| bz2c = BZ2Compressor() |
| n = 0 |
| data = b'' |
| while True: |
| str = self.TEXT[n*10:(n+1)*10] |
| if not str: |
| break |
| data += bz2c.compress(str) |
| n += 1 |
| data += bz2c.flush() |
| self.assertEqual(ext_decompress(data), self.TEXT) |
| |
| @bigmemtest(size=_4G + 100, memuse=2) |
| def testCompress4G(self, size): |
| # "Test BZ2Compressor.compress()/flush() with >4GiB input" |
| bz2c = BZ2Compressor() |
| data = b"x" * size |
| try: |
| compressed = bz2c.compress(data) |
| compressed += bz2c.flush() |
| finally: |
| data = None # Release memory |
| data = bz2.decompress(compressed) |
| try: |
| self.assertEqual(len(data), size) |
| self.assertEqual(len(data.strip(b"x")), 0) |
| finally: |
| data = None |
| |
| def testPickle(self): |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| with self.assertRaises(TypeError): |
| pickle.dumps(BZ2Compressor(), proto) |
| |
| |
| class BZ2DecompressorTest(BaseTest): |
| def test_Constructor(self): |
| self.assertRaises(TypeError, BZ2Decompressor, 42) |
| |
| def testDecompress(self): |
| bz2d = BZ2Decompressor() |
| self.assertRaises(TypeError, bz2d.decompress) |
| text = bz2d.decompress(self.DATA) |
| self.assertEqual(text, self.TEXT) |
| |
| def testDecompressChunks10(self): |
| bz2d = BZ2Decompressor() |
| text = b'' |
| n = 0 |
| while True: |
| 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): |
| bz2d = BZ2Decompressor() |
| unused_data = b"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): |
| bz2d = BZ2Decompressor() |
| text = bz2d.decompress(self.DATA) |
| self.assertRaises(EOFError, bz2d.decompress, b"anything") |
| self.assertRaises(EOFError, bz2d.decompress, b"") |
| |
| @bigmemtest(size=_4G + 100, memuse=3.3) |
| def testDecompress4G(self, size): |
| # "Test BZ2Decompressor.decompress() with >4GiB input" |
| blocksize = 10 * 1024 * 1024 |
| block = random.getrandbits(blocksize * 8).to_bytes(blocksize, 'little') |
| try: |
| data = block * (size // blocksize + 1) |
| compressed = bz2.compress(data) |
| bz2d = BZ2Decompressor() |
| decompressed = bz2d.decompress(compressed) |
| self.assertTrue(decompressed == data) |
| finally: |
| data = None |
| compressed = None |
| decompressed = None |
| |
| def testPickle(self): |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| with self.assertRaises(TypeError): |
| pickle.dumps(BZ2Decompressor(), proto) |
| |
| def testDecompressorChunksMaxsize(self): |
| bzd = BZ2Decompressor() |
| max_length = 100 |
| out = [] |
| |
| # Feed some input |
| len_ = len(self.BIG_DATA) - 64 |
| out.append(bzd.decompress(self.BIG_DATA[:len_], |
| max_length=max_length)) |
| self.assertFalse(bzd.needs_input) |
| self.assertEqual(len(out[-1]), max_length) |
| |
| # Retrieve more data without providing more input |
| out.append(bzd.decompress(b'', max_length=max_length)) |
| self.assertFalse(bzd.needs_input) |
| self.assertEqual(len(out[-1]), max_length) |
| |
| # Retrieve more data while providing more input |
| out.append(bzd.decompress(self.BIG_DATA[len_:], |
| max_length=max_length)) |
| self.assertLessEqual(len(out[-1]), max_length) |
| |
| # Retrieve remaining uncompressed data |
| while not bzd.eof: |
| out.append(bzd.decompress(b'', max_length=max_length)) |
| self.assertLessEqual(len(out[-1]), max_length) |
| |
| out = b"".join(out) |
| self.assertEqual(out, self.BIG_TEXT) |
| self.assertEqual(bzd.unused_data, b"") |
| |
| def test_decompressor_inputbuf_1(self): |
| # Test reusing input buffer after moving existing |
| # contents to beginning |
| bzd = BZ2Decompressor() |
| out = [] |
| |
| # Create input buffer and fill it |
| self.assertEqual(bzd.decompress(self.DATA[:100], |
| max_length=0), b'') |
| |
| # Retrieve some results, freeing capacity at beginning |
| # of input buffer |
| out.append(bzd.decompress(b'', 2)) |
| |
| # Add more data that fits into input buffer after |
| # moving existing data to beginning |
| out.append(bzd.decompress(self.DATA[100:105], 15)) |
| |
| # Decompress rest of data |
| out.append(bzd.decompress(self.DATA[105:])) |
| self.assertEqual(b''.join(out), self.TEXT) |
| |
| def test_decompressor_inputbuf_2(self): |
| # Test reusing input buffer by appending data at the |
| # end right away |
| bzd = BZ2Decompressor() |
| out = [] |
| |
| # Create input buffer and empty it |
| self.assertEqual(bzd.decompress(self.DATA[:200], |
| max_length=0), b'') |
| out.append(bzd.decompress(b'')) |
| |
| # Fill buffer with new data |
| out.append(bzd.decompress(self.DATA[200:280], 2)) |
| |
| # Append some more data, not enough to require resize |
| out.append(bzd.decompress(self.DATA[280:300], 2)) |
| |
| # Decompress rest of data |
| out.append(bzd.decompress(self.DATA[300:])) |
| self.assertEqual(b''.join(out), self.TEXT) |
| |
| def test_decompressor_inputbuf_3(self): |
| # Test reusing input buffer after extending it |
| |
| bzd = BZ2Decompressor() |
| out = [] |
| |
| # Create almost full input buffer |
| out.append(bzd.decompress(self.DATA[:200], 5)) |
| |
| # Add even more data to it, requiring resize |
| out.append(bzd.decompress(self.DATA[200:300], 5)) |
| |
| # Decompress rest of data |
| out.append(bzd.decompress(self.DATA[300:])) |
| self.assertEqual(b''.join(out), self.TEXT) |
| |
| def test_failure(self): |
| bzd = BZ2Decompressor() |
| self.assertRaises(Exception, bzd.decompress, self.BAD_DATA * 30) |
| # Previously, a second call could crash due to internal inconsistency |
| self.assertRaises(Exception, bzd.decompress, self.BAD_DATA * 30) |
| |
| class CompressDecompressTest(BaseTest): |
| def testCompress(self): |
| data = bz2.compress(self.TEXT) |
| self.assertEqual(ext_decompress(data), self.TEXT) |
| |
| def testCompressEmptyString(self): |
| text = bz2.compress(b'') |
| self.assertEqual(text, self.EMPTY_DATA) |
| |
| def testDecompress(self): |
| text = bz2.decompress(self.DATA) |
| self.assertEqual(text, self.TEXT) |
| |
| def testDecompressEmpty(self): |
| text = bz2.decompress(b"") |
| self.assertEqual(text, b"") |
| |
| def testDecompressToEmptyString(self): |
| text = bz2.decompress(self.EMPTY_DATA) |
| self.assertEqual(text, b'') |
| |
| def testDecompressIncomplete(self): |
| self.assertRaises(ValueError, bz2.decompress, self.DATA[:-10]) |
| |
| def testDecompressBadData(self): |
| self.assertRaises(OSError, bz2.decompress, self.BAD_DATA) |
| |
| def testDecompressMultiStream(self): |
| text = bz2.decompress(self.DATA * 5) |
| self.assertEqual(text, self.TEXT * 5) |
| |
| def testDecompressTrailingJunk(self): |
| text = bz2.decompress(self.DATA + self.BAD_DATA) |
| self.assertEqual(text, self.TEXT) |
| |
| def testDecompressMultiStreamTrailingJunk(self): |
| text = bz2.decompress(self.DATA * 5 + self.BAD_DATA) |
| self.assertEqual(text, self.TEXT * 5) |
| |
| |
| class OpenTest(BaseTest): |
| "Test the open function." |
| |
| def open(self, *args, **kwargs): |
| return bz2.open(*args, **kwargs) |
| |
| def test_binary_modes(self): |
| for mode in ("wb", "xb"): |
| if mode == "xb": |
| unlink(self.filename) |
| with self.open(self.filename, mode) as f: |
| f.write(self.TEXT) |
| with open(self.filename, "rb") as f: |
| file_data = ext_decompress(f.read()) |
| self.assertEqual(file_data, self.TEXT) |
| with self.open(self.filename, "rb") as f: |
| self.assertEqual(f.read(), self.TEXT) |
| with self.open(self.filename, "ab") as f: |
| f.write(self.TEXT) |
| with open(self.filename, "rb") as f: |
| file_data = ext_decompress(f.read()) |
| self.assertEqual(file_data, self.TEXT * 2) |
| |
| def test_implicit_binary_modes(self): |
| # Test implicit binary modes (no "b" or "t" in mode string). |
| for mode in ("w", "x"): |
| if mode == "x": |
| unlink(self.filename) |
| with self.open(self.filename, mode) as f: |
| f.write(self.TEXT) |
| with open(self.filename, "rb") as f: |
| file_data = ext_decompress(f.read()) |
| self.assertEqual(file_data, self.TEXT) |
| with self.open(self.filename, "r") as f: |
| self.assertEqual(f.read(), self.TEXT) |
| with self.open(self.filename, "a") as f: |
| f.write(self.TEXT) |
| with open(self.filename, "rb") as f: |
| file_data = ext_decompress(f.read()) |
| self.assertEqual(file_data, self.TEXT * 2) |
| |
| def test_text_modes(self): |
| text = self.TEXT.decode("ascii") |
| text_native_eol = text.replace("\n", os.linesep) |
| for mode in ("wt", "xt"): |
| if mode == "xt": |
| unlink(self.filename) |
| with self.open(self.filename, mode) as f: |
| f.write(text) |
| with open(self.filename, "rb") as f: |
| file_data = ext_decompress(f.read()).decode("ascii") |
| self.assertEqual(file_data, text_native_eol) |
| with self.open(self.filename, "rt") as f: |
| self.assertEqual(f.read(), text) |
| with self.open(self.filename, "at") as f: |
| f.write(text) |
| with open(self.filename, "rb") as f: |
| file_data = ext_decompress(f.read()).decode("ascii") |
| self.assertEqual(file_data, text_native_eol * 2) |
| |
| def test_x_mode(self): |
| for mode in ("x", "xb", "xt"): |
| unlink(self.filename) |
| with self.open(self.filename, mode) as f: |
| pass |
| with self.assertRaises(FileExistsError): |
| with self.open(self.filename, mode) as f: |
| pass |
| |
| def test_fileobj(self): |
| with self.open(BytesIO(self.DATA), "r") as f: |
| self.assertEqual(f.read(), self.TEXT) |
| with self.open(BytesIO(self.DATA), "rb") as f: |
| self.assertEqual(f.read(), self.TEXT) |
| text = self.TEXT.decode("ascii") |
| with self.open(BytesIO(self.DATA), "rt") as f: |
| self.assertEqual(f.read(), text) |
| |
| def test_bad_params(self): |
| # Test invalid parameter combinations. |
| self.assertRaises(ValueError, |
| self.open, self.filename, "wbt") |
| self.assertRaises(ValueError, |
| self.open, self.filename, "xbt") |
| self.assertRaises(ValueError, |
| self.open, self.filename, "rb", encoding="utf-8") |
| self.assertRaises(ValueError, |
| self.open, self.filename, "rb", errors="ignore") |
| self.assertRaises(ValueError, |
| self.open, self.filename, "rb", newline="\n") |
| |
| def test_encoding(self): |
| # Test non-default encoding. |
| text = self.TEXT.decode("ascii") |
| text_native_eol = text.replace("\n", os.linesep) |
| with self.open(self.filename, "wt", encoding="utf-16-le") as f: |
| f.write(text) |
| with open(self.filename, "rb") as f: |
| file_data = ext_decompress(f.read()).decode("utf-16-le") |
| self.assertEqual(file_data, text_native_eol) |
| with self.open(self.filename, "rt", encoding="utf-16-le") as f: |
| self.assertEqual(f.read(), text) |
| |
| def test_encoding_error_handler(self): |
| # Test with non-default encoding error handler. |
| with self.open(self.filename, "wb") as f: |
| f.write(b"foo\xffbar") |
| with self.open(self.filename, "rt", encoding="ascii", errors="ignore") \ |
| as f: |
| self.assertEqual(f.read(), "foobar") |
| |
| def test_newline(self): |
| # Test with explicit newline (universal newline mode disabled). |
| text = self.TEXT.decode("ascii") |
| with self.open(self.filename, "wt", newline="\n") as f: |
| f.write(text) |
| with self.open(self.filename, "rt", newline="\r") as f: |
| self.assertEqual(f.readlines(), [text]) |
| |
| |
| def test_main(): |
| support.run_unittest( |
| BZ2FileTest, |
| BZ2CompressorTest, |
| BZ2DecompressorTest, |
| CompressDecompressTest, |
| OpenTest, |
| ) |
| support.reap_children() |
| |
| if __name__ == '__main__': |
| test_main() |