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from test import support from test.support import bigmemtest, _4G import array import unittest from io import BytesIO, DEFAULT_BUFFER_SIZE import os import pickle import glob import tempfile import pathlib import random import shutil import subprocess import threading from test.support import unlink import _compression import sys # 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 100,000 bytes, 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(glob.escape(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): fd, self.filename = tempfile.mkstemp() os.close(fd) def tearDown(self): 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) # compresslevel is keyword-only self.assertRaises(TypeError, BZ2File, os.devnull, "r", 3) 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") 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 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) def test_issue44439(self): q = array.array('Q', [1, 2, 3, 4, 5]) LENGTH = len(q) * q.itemsize with BZ2File(BytesIO(), 'w') as f: self.assertEqual(f.write(q), LENGTH) self.assertEqual(f.tell(), LENGTH) 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) @support.skip_if_pgo_task @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"") @support.skip_if_pgo_task @bigmemtest(size=_4G + 100, memuse=3.3) def testDecompress4G(self, size): # "Test BZ2Decompressor.decompress() with >4GiB input" blocksize = 10 * 1024 * 1024 block = random.randbytes(blocksize) 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) @support.refcount_test def test_refleaks_in___init__(self): gettotalrefcount = support.get_attribute(sys, 'gettotalrefcount') bzd = BZ2Decompressor() refs_before = gettotalrefcount() for i in range(100): bzd.__init__() self.assertAlmostEqual(gettotalrefcount() - refs_before, 0, delta=10) 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 tearDownModule(): support.reap_children() if __name__ == '__main__': unittest.main()