diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/bz2.py | 13 | ||||
| -rw-r--r-- | Lib/test/test_bz2.py | 136 |
2 files changed, 75 insertions, 74 deletions
@@ -9,7 +9,6 @@ __all__ = ["BZ2File", "BZ2Compressor", "BZ2Decompressor", __author__ = "Nadeem Vawda <nadeem.vawda@gmail.com>" -import builtins import io import warnings @@ -28,6 +27,8 @@ _MODE_WRITE = 3 _BUFFER_SIZE = 8192 +_builtin_open = open + class BZ2File(io.BufferedIOBase): @@ -90,10 +91,10 @@ class BZ2File(io.BufferedIOBase): mode_code = _MODE_WRITE self._compressor = BZ2Compressor(compresslevel) else: - raise ValueError("Invalid mode: {!r}".format(mode)) + raise ValueError("Invalid mode: %r" % (mode,)) if isinstance(filename, (str, bytes)): - self._fp = builtins.open(filename, mode) + self._fp = _builtin_open(filename, mode) self._closefp = True self._mode = mode_code elif hasattr(filename, "read") or hasattr(filename, "write"): @@ -189,15 +190,17 @@ class BZ2File(io.BufferedIOBase): if not rawblock: if self._decompressor.eof: + # End-of-stream marker and end of file. We're good. self._mode = _MODE_READ_EOF self._size = self._pos return False else: + # Problem - we were expecting more compressed data. raise EOFError("Compressed file ended before the " "end-of-stream marker was reached") - # Continue to next stream. if self._decompressor.eof: + # Continue to next stream. self._decompressor = BZ2Decompressor() self._buffer = self._decompressor.decompress(rawblock) @@ -412,7 +415,7 @@ class BZ2File(io.BufferedIOBase): self._read_all(return_data=False) offset = self._size + offset else: - raise ValueError("Invalid value for whence: {}".format(whence)) + raise ValueError("Invalid value for whence: %s" % (whence,)) # Make it so that offset is the number of bytes to skip forward. if offset < self._pos: diff --git a/Lib/test/test_bz2.py b/Lib/test/test_bz2.py index 92548f4..e8e9d32 100644 --- a/Lib/test/test_bz2.py +++ b/Lib/test/test_bz2.py @@ -1,6 +1,6 @@ #!/usr/bin/env python3 from test import support -from test.support import TESTFN, bigmemtest, _4G +from test.support import bigmemtest, _4G import unittest from io import BytesIO @@ -18,10 +18,10 @@ except ImportError: bz2 = support.import_module('bz2') from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor -has_cmdline_bunzip2 = (sys.platform != "win32") 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', @@ -49,13 +49,17 @@ class BaseTest(unittest.TestCase): 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`' def setUp(self): - self.filename = TESTFN + self.filename = support.TESTFN def tearDown(self): if os.path.isfile(self.filename): os.unlink(self.filename) - if has_cmdline_bunzip2: + if sys.platform == "win32": + # bunzip2 isn't available to run on Windows. + def decompress(self, data): + return bz2.decompress(data) + else: def decompress(self, data): pop = subprocess.Popen("bunzip2", shell=True, stdin=subprocess.PIPE, @@ -69,31 +73,21 @@ class BaseTest(unittest.TestCase): 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." + "Test the BZ2File class." def createTempFile(self, streams=1): with open(self.filename, "wb") as f: f.write(self.DATA * streams) def testBadArgs(self): - with self.assertRaises(TypeError): - BZ2File(123.456) - with self.assertRaises(ValueError): - BZ2File("/dev/null", "z") - with self.assertRaises(ValueError): - BZ2File("/dev/null", "rx") - with self.assertRaises(ValueError): - BZ2File("/dev/null", "rbt") - with self.assertRaises(ValueError): - BZ2File("/dev/null", compresslevel=0) - with self.assertRaises(ValueError): - BZ2File("/dev/null", compresslevel=10) + self.assertRaises(TypeError, BZ2File, 123.456) + self.assertRaises(ValueError, BZ2File, "/dev/null", "z") + self.assertRaises(ValueError, BZ2File, "/dev/null", "rx") + self.assertRaises(ValueError, BZ2File, "/dev/null", "rbt") + self.assertRaises(ValueError, BZ2File, "/dev/null", compresslevel=0) + self.assertRaises(ValueError, BZ2File, "/dev/null", compresslevel=10) def testRead(self): self.createTempFile() @@ -214,9 +208,8 @@ class BZ2FileTest(BaseTest): self.createTempFile() bz2f = BZ2File(self.filename) bz2f.close() - self.assertRaises(ValueError, bz2f.__next__) - # This call will deadlock if the above .__next__ call failed to - # release the lock. + 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): @@ -379,7 +372,7 @@ class BZ2FileTest(BaseTest): bz2f.close() self.assertRaises(ValueError, bz2f.seekable) - bz2f = BZ2File(BytesIO(), mode="w") + bz2f = BZ2File(BytesIO(), "w") try: self.assertFalse(bz2f.seekable()) finally: @@ -405,7 +398,7 @@ class BZ2FileTest(BaseTest): bz2f.close() self.assertRaises(ValueError, bz2f.readable) - bz2f = BZ2File(BytesIO(), mode="w") + bz2f = BZ2File(BytesIO(), "w") try: self.assertFalse(bz2f.readable()) finally: @@ -422,7 +415,7 @@ class BZ2FileTest(BaseTest): bz2f.close() self.assertRaises(ValueError, bz2f.writable) - bz2f = BZ2File(BytesIO(), mode="w") + bz2f = BZ2File(BytesIO(), "w") try: self.assertTrue(bz2f.writable()) finally: @@ -476,7 +469,7 @@ class BZ2FileTest(BaseTest): # Issue #7205: Using a BZ2File from several threads shouldn't deadlock. data = b"1" * 2**20 nthreads = 10 - with bz2.BZ2File(self.filename, 'wb') as f: + with BZ2File(self.filename, 'wb') as f: def comp(): for i in range(5): f.write(data) @@ -487,28 +480,27 @@ class BZ2FileTest(BaseTest): t.join() def testWithoutThreading(self): - bz2 = support.import_fresh_module("bz2", blocked=("threading",)) - with bz2.BZ2File(self.filename, "wb") as f: + module = support.import_fresh_module("bz2", blocked=("threading",)) + with module.BZ2File(self.filename, "wb") as f: f.write(b"abc") - with bz2.BZ2File(self.filename, "rb") as f: + 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 bz2.BZ2File(self.filename) as bz2f: + 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 bz2.BZ2File(self.filename) as bz2f: + 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 bz2.BZ2File(self.filename) as bz2f: + with BZ2File(self.filename) as bz2f: bz2f.readlines() - with self.assertRaises(StopIteration): - next(bz2f) + self.assertRaises(StopIteration, next, bz2f) self.assertEqual(bz2f.readlines(), []) def testMultiStreamOrdering(self): @@ -576,6 +568,7 @@ class BZ2FileTest(BaseTest): bz2f.seek(-150, 1) self.assertEqual(bz2f.read(), self.TEXT[500-150:]) + class BZ2CompressorTest(BaseTest): def testCompress(self): bz2c = BZ2Compressor() @@ -687,97 +680,102 @@ class CompressDecompressTest(BaseTest): class OpenTest(BaseTest): + "Test the open function." + + def open(self, *args, **kwargs): + return bz2.open(*args, **kwargs) + def test_binary_modes(self): - with bz2.open(self.filename, "wb") as f: + with self.open(self.filename, "wb") as f: f.write(self.TEXT) with open(self.filename, "rb") as f: - file_data = bz2.decompress(f.read()) + file_data = self.decompress(f.read()) self.assertEqual(file_data, self.TEXT) - with bz2.open(self.filename, "rb") as f: + with self.open(self.filename, "rb") as f: self.assertEqual(f.read(), self.TEXT) - with bz2.open(self.filename, "ab") as f: + with self.open(self.filename, "ab") as f: f.write(self.TEXT) with open(self.filename, "rb") as f: - file_data = bz2.decompress(f.read()) + file_data = self.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). - with bz2.open(self.filename, "w") as f: + with self.open(self.filename, "w") as f: f.write(self.TEXT) with open(self.filename, "rb") as f: - file_data = bz2.decompress(f.read()) + file_data = self.decompress(f.read()) self.assertEqual(file_data, self.TEXT) - with bz2.open(self.filename, "r") as f: + with self.open(self.filename, "r") as f: self.assertEqual(f.read(), self.TEXT) - with bz2.open(self.filename, "a") as f: + with self.open(self.filename, "a") as f: f.write(self.TEXT) with open(self.filename, "rb") as f: - file_data = bz2.decompress(f.read()) + file_data = self.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) - with bz2.open(self.filename, "wt") as f: + with self.open(self.filename, "wt") as f: f.write(text) with open(self.filename, "rb") as f: - file_data = bz2.decompress(f.read()).decode("ascii") + file_data = self.decompress(f.read()).decode("ascii") self.assertEqual(file_data, text_native_eol) - with bz2.open(self.filename, "rt") as f: + with self.open(self.filename, "rt") as f: self.assertEqual(f.read(), text) - with bz2.open(self.filename, "at") as f: + with self.open(self.filename, "at") as f: f.write(text) with open(self.filename, "rb") as f: - file_data = bz2.decompress(f.read()).decode("ascii") + file_data = self.decompress(f.read()).decode("ascii") self.assertEqual(file_data, text_native_eol * 2) def test_fileobj(self): - with bz2.open(BytesIO(self.DATA), "r") as f: + with self.open(BytesIO(self.DATA), "r") as f: self.assertEqual(f.read(), self.TEXT) - with bz2.open(BytesIO(self.DATA), "rb") as f: + with self.open(BytesIO(self.DATA), "rb") as f: self.assertEqual(f.read(), self.TEXT) text = self.TEXT.decode("ascii") - with bz2.open(BytesIO(self.DATA), "rt") as f: + with self.open(BytesIO(self.DATA), "rt") as f: self.assertEqual(f.read(), text) def test_bad_params(self): # Test invalid parameter combinations. - with self.assertRaises(ValueError): - bz2.open(self.filename, "wbt") - with self.assertRaises(ValueError): - bz2.open(self.filename, "rb", encoding="utf-8") - with self.assertRaises(ValueError): - bz2.open(self.filename, "rb", errors="ignore") - with self.assertRaises(ValueError): - bz2.open(self.filename, "rb", newline="\n") + self.assertRaises(ValueError, + self.open, self.filename, "wbt") + 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 bz2.open(self.filename, "wt", encoding="utf-16-le") as f: + with self.open(self.filename, "wt", encoding="utf-16-le") as f: f.write(text) with open(self.filename, "rb") as f: - file_data = bz2.decompress(f.read()).decode("utf-16-le") + file_data = self.decompress(f.read()).decode("utf-16-le") self.assertEqual(file_data, text_native_eol) - with bz2.open(self.filename, "rt", encoding="utf-16-le") as f: + 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 bz2.open(self.filename, "wb") as f: + with self.open(self.filename, "wb") as f: f.write(b"foo\xffbar") - with bz2.open(self.filename, "rt", encoding="ascii", errors="ignore") \ + 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 bz2.open(self.filename, "wt", newline="\n") as f: + with self.open(self.filename, "wt", newline="\n") as f: f.write(text) - with bz2.open(self.filename, "rt", newline="\r") as f: + with self.open(self.filename, "rt", newline="\r") as f: self.assertEqual(f.readlines(), [text]) |