| """Test script for the gzip module. |
| """ |
| |
| import array |
| import functools |
| import io |
| import os |
| import pathlib |
| import struct |
| import sys |
| import unittest |
| from subprocess import PIPE, Popen |
| from test.support import import_helper |
| from test.support import os_helper |
| from test.support import _4G, bigmemtest |
| from test.support.script_helper import assert_python_ok, assert_python_failure |
| |
| gzip = import_helper.import_module('gzip') |
| |
| data1 = b""" int length=DEFAULTALLOC, err = Z_OK; |
| PyObject *RetVal; |
| int flushmode = Z_FINISH; |
| unsigned long start_total_out; |
| |
| """ |
| |
| data2 = b"""/* zlibmodule.c -- gzip-compatible data compression */ |
| /* See http://www.gzip.org/zlib/ |
| /* See http://www.winimage.com/zLibDll for Windows */ |
| """ |
| |
| |
| TEMPDIR = os.path.abspath(os_helper.TESTFN) + '-gzdir' |
| |
| |
| class UnseekableIO(io.BytesIO): |
| def seekable(self): |
| return False |
| |
| def tell(self): |
| raise io.UnsupportedOperation |
| |
| def seek(self, *args): |
| raise io.UnsupportedOperation |
| |
| |
| class BaseTest(unittest.TestCase): |
| filename = os_helper.TESTFN |
| |
| def setUp(self): |
| os_helper.unlink(self.filename) |
| |
| def tearDown(self): |
| os_helper.unlink(self.filename) |
| |
| |
| class TestGzip(BaseTest): |
| def write_and_read_back(self, data, mode='b'): |
| b_data = bytes(data) |
| with gzip.GzipFile(self.filename, 'w'+mode) as f: |
| l = f.write(data) |
| self.assertEqual(l, len(b_data)) |
| with gzip.GzipFile(self.filename, 'r'+mode) as f: |
| self.assertEqual(f.read(), b_data) |
| |
| def test_write(self): |
| with gzip.GzipFile(self.filename, 'wb') as f: |
| f.write(data1 * 50) |
| |
| # Try flush and fileno. |
| f.flush() |
| f.fileno() |
| if hasattr(os, 'fsync'): |
| os.fsync(f.fileno()) |
| f.close() |
| |
| # Test multiple close() calls. |
| f.close() |
| |
| def test_write_read_with_pathlike_file(self): |
| filename = pathlib.Path(self.filename) |
| with gzip.GzipFile(filename, 'w') as f: |
| f.write(data1 * 50) |
| self.assertIsInstance(f.name, str) |
| with gzip.GzipFile(filename, 'a') as f: |
| f.write(data1) |
| with gzip.GzipFile(filename) as f: |
| d = f.read() |
| self.assertEqual(d, data1 * 51) |
| self.assertIsInstance(f.name, str) |
| |
| # The following test_write_xy methods test that write accepts |
| # the corresponding bytes-like object type as input |
| # and that the data written equals bytes(xy) in all cases. |
| def test_write_memoryview(self): |
| self.write_and_read_back(memoryview(data1 * 50)) |
| m = memoryview(bytes(range(256))) |
| data = m.cast('B', shape=[8,8,4]) |
| self.write_and_read_back(data) |
| |
| def test_write_bytearray(self): |
| self.write_and_read_back(bytearray(data1 * 50)) |
| |
| def test_write_array(self): |
| self.write_and_read_back(array.array('I', data1 * 40)) |
| |
| def test_write_incompatible_type(self): |
| # Test that non-bytes-like types raise TypeError. |
| # Issue #21560: attempts to write incompatible types |
| # should not affect the state of the fileobject |
| with gzip.GzipFile(self.filename, 'wb') as f: |
| with self.assertRaises(TypeError): |
| f.write('') |
| with self.assertRaises(TypeError): |
| f.write([]) |
| f.write(data1) |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| self.assertEqual(f.read(), data1) |
| |
| def test_read(self): |
| self.test_write() |
| # Try reading. |
| with gzip.GzipFile(self.filename, 'r') as f: |
| d = f.read() |
| self.assertEqual(d, data1*50) |
| |
| def test_read1(self): |
| self.test_write() |
| blocks = [] |
| nread = 0 |
| with gzip.GzipFile(self.filename, 'r') as f: |
| while True: |
| d = f.read1() |
| if not d: |
| break |
| blocks.append(d) |
| nread += len(d) |
| # Check that position was updated correctly (see issue10791). |
| self.assertEqual(f.tell(), nread) |
| self.assertEqual(b''.join(blocks), data1 * 50) |
| |
| @bigmemtest(size=_4G, memuse=1) |
| def test_read_large(self, size): |
| # Read chunk size over UINT_MAX should be supported, despite zlib's |
| # limitation per low-level call |
| compressed = gzip.compress(data1, compresslevel=1) |
| f = gzip.GzipFile(fileobj=io.BytesIO(compressed), mode='rb') |
| self.assertEqual(f.read(size), data1) |
| |
| def test_io_on_closed_object(self): |
| # Test that I/O operations on closed GzipFile objects raise a |
| # ValueError, just like the corresponding functions on file objects. |
| |
| # Write to a file, open it for reading, then close it. |
| self.test_write() |
| f = gzip.GzipFile(self.filename, 'r') |
| fileobj = f.fileobj |
| self.assertFalse(fileobj.closed) |
| f.close() |
| self.assertTrue(fileobj.closed) |
| with self.assertRaises(ValueError): |
| f.read(1) |
| with self.assertRaises(ValueError): |
| f.seek(0) |
| with self.assertRaises(ValueError): |
| f.tell() |
| # Open the file for writing, then close it. |
| f = gzip.GzipFile(self.filename, 'w') |
| fileobj = f.fileobj |
| self.assertFalse(fileobj.closed) |
| f.close() |
| self.assertTrue(fileobj.closed) |
| with self.assertRaises(ValueError): |
| f.write(b'') |
| with self.assertRaises(ValueError): |
| f.flush() |
| |
| def test_append(self): |
| self.test_write() |
| # Append to the previous file |
| with gzip.GzipFile(self.filename, 'ab') as f: |
| f.write(data2 * 15) |
| |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| d = f.read() |
| self.assertEqual(d, (data1*50) + (data2*15)) |
| |
| def test_many_append(self): |
| # Bug #1074261 was triggered when reading a file that contained |
| # many, many members. Create such a file and verify that reading it |
| # works. |
| with gzip.GzipFile(self.filename, 'wb', 9) as f: |
| f.write(b'a') |
| for i in range(0, 200): |
| with gzip.GzipFile(self.filename, "ab", 9) as f: # append |
| f.write(b'a') |
| |
| # Try reading the file |
| with gzip.GzipFile(self.filename, "rb") as zgfile: |
| contents = b"" |
| while 1: |
| ztxt = zgfile.read(8192) |
| contents += ztxt |
| if not ztxt: break |
| self.assertEqual(contents, b'a'*201) |
| |
| def test_exclusive_write(self): |
| with gzip.GzipFile(self.filename, 'xb') as f: |
| f.write(data1 * 50) |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| self.assertEqual(f.read(), data1 * 50) |
| with self.assertRaises(FileExistsError): |
| gzip.GzipFile(self.filename, 'xb') |
| |
| def test_buffered_reader(self): |
| # Issue #7471: a GzipFile can be wrapped in a BufferedReader for |
| # performance. |
| self.test_write() |
| |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| with io.BufferedReader(f) as r: |
| lines = [line for line in r] |
| |
| self.assertEqual(lines, 50 * data1.splitlines(keepends=True)) |
| |
| def test_readline(self): |
| self.test_write() |
| # Try .readline() with varying line lengths |
| |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| line_length = 0 |
| while 1: |
| L = f.readline(line_length) |
| if not L and line_length != 0: break |
| self.assertTrue(len(L) <= line_length) |
| line_length = (line_length + 1) % 50 |
| |
| def test_readlines(self): |
| self.test_write() |
| # Try .readlines() |
| |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| L = f.readlines() |
| |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| while 1: |
| L = f.readlines(150) |
| if L == []: break |
| |
| def test_seek_read(self): |
| self.test_write() |
| # Try seek, read test |
| |
| with gzip.GzipFile(self.filename) as f: |
| while 1: |
| oldpos = f.tell() |
| line1 = f.readline() |
| if not line1: break |
| newpos = f.tell() |
| f.seek(oldpos) # negative seek |
| if len(line1)>10: |
| amount = 10 |
| else: |
| amount = len(line1) |
| line2 = f.read(amount) |
| self.assertEqual(line1[:amount], line2) |
| f.seek(newpos) # positive seek |
| |
| def test_seek_whence(self): |
| self.test_write() |
| # Try seek(whence=1), read test |
| |
| with gzip.GzipFile(self.filename) as f: |
| f.read(10) |
| f.seek(10, whence=1) |
| y = f.read(10) |
| self.assertEqual(y, data1[20:30]) |
| |
| def test_seek_write(self): |
| # Try seek, write test |
| with gzip.GzipFile(self.filename, 'w') as f: |
| for pos in range(0, 256, 16): |
| f.seek(pos) |
| f.write(b'GZ\n') |
| |
| def test_mode(self): |
| self.test_write() |
| with gzip.GzipFile(self.filename, 'r') as f: |
| self.assertEqual(f.myfileobj.mode, 'rb') |
| os_helper.unlink(self.filename) |
| with gzip.GzipFile(self.filename, 'x') as f: |
| self.assertEqual(f.myfileobj.mode, 'xb') |
| |
| def test_1647484(self): |
| for mode in ('wb', 'rb'): |
| with gzip.GzipFile(self.filename, mode) as f: |
| self.assertTrue(hasattr(f, "name")) |
| self.assertEqual(f.name, self.filename) |
| |
| def test_paddedfile_getattr(self): |
| self.test_write() |
| with gzip.GzipFile(self.filename, 'rb') as f: |
| self.assertTrue(hasattr(f.fileobj, "name")) |
| self.assertEqual(f.fileobj.name, self.filename) |
| |
| def test_mtime(self): |
| mtime = 123456789 |
| with gzip.GzipFile(self.filename, 'w', mtime = mtime) as fWrite: |
| fWrite.write(data1) |
| with gzip.GzipFile(self.filename) as fRead: |
| self.assertTrue(hasattr(fRead, 'mtime')) |
| self.assertIsNone(fRead.mtime) |
| dataRead = fRead.read() |
| self.assertEqual(dataRead, data1) |
| self.assertEqual(fRead.mtime, mtime) |
| |
| def test_metadata(self): |
| mtime = 123456789 |
| |
| with gzip.GzipFile(self.filename, 'w', mtime = mtime) as fWrite: |
| fWrite.write(data1) |
| |
| with open(self.filename, 'rb') as fRead: |
| # see RFC 1952: http://www.faqs.org/rfcs/rfc1952.html |
| |
| idBytes = fRead.read(2) |
| self.assertEqual(idBytes, b'\x1f\x8b') # gzip ID |
| |
| cmByte = fRead.read(1) |
| self.assertEqual(cmByte, b'\x08') # deflate |
| |
| try: |
| expectedname = self.filename.encode('Latin-1') + b'\x00' |
| expectedflags = b'\x08' # only the FNAME flag is set |
| except UnicodeEncodeError: |
| expectedname = b'' |
| expectedflags = b'\x00' |
| |
| flagsByte = fRead.read(1) |
| self.assertEqual(flagsByte, expectedflags) |
| |
| mtimeBytes = fRead.read(4) |
| self.assertEqual(mtimeBytes, struct.pack('<i', mtime)) # little-endian |
| |
| xflByte = fRead.read(1) |
| self.assertEqual(xflByte, b'\x02') # maximum compression |
| |
| osByte = fRead.read(1) |
| self.assertEqual(osByte, b'\xff') # OS "unknown" (OS-independent) |
| |
| # Since the FNAME flag is set, the zero-terminated filename follows. |
| # RFC 1952 specifies that this is the name of the input file, if any. |
| # However, the gzip module defaults to storing the name of the output |
| # file in this field. |
| nameBytes = fRead.read(len(expectedname)) |
| self.assertEqual(nameBytes, expectedname) |
| |
| # Since no other flags were set, the header ends here. |
| # Rather than process the compressed data, let's seek to the trailer. |
| fRead.seek(os.stat(self.filename).st_size - 8) |
| |
| crc32Bytes = fRead.read(4) # CRC32 of uncompressed data [data1] |
| self.assertEqual(crc32Bytes, b'\xaf\xd7d\x83') |
| |
| isizeBytes = fRead.read(4) |
| self.assertEqual(isizeBytes, struct.pack('<i', len(data1))) |
| |
| def test_metadata_ascii_name(self): |
| self.filename = os_helper.TESTFN_ASCII |
| self.test_metadata() |
| |
| def test_compresslevel_metadata(self): |
| # see RFC 1952: http://www.faqs.org/rfcs/rfc1952.html |
| # specifically, discussion of XFL in section 2.3.1 |
| cases = [ |
| ('fast', 1, b'\x04'), |
| ('best', 9, b'\x02'), |
| ('tradeoff', 6, b'\x00'), |
| ] |
| xflOffset = 8 |
| |
| for (name, level, expectedXflByte) in cases: |
| with self.subTest(name): |
| fWrite = gzip.GzipFile(self.filename, 'w', compresslevel=level) |
| with fWrite: |
| fWrite.write(data1) |
| with open(self.filename, 'rb') as fRead: |
| fRead.seek(xflOffset) |
| xflByte = fRead.read(1) |
| self.assertEqual(xflByte, expectedXflByte) |
| |
| def test_with_open(self): |
| # GzipFile supports the context management protocol |
| with gzip.GzipFile(self.filename, "wb") as f: |
| f.write(b"xxx") |
| f = gzip.GzipFile(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 gzip.GzipFile(self.filename, "wb") as f: |
| 1/0 |
| except ZeroDivisionError: |
| pass |
| else: |
| self.fail("1/0 didn't raise an exception") |
| |
| def test_zero_padded_file(self): |
| with gzip.GzipFile(self.filename, "wb") as f: |
| f.write(data1 * 50) |
| |
| # Pad the file with zeroes |
| with open(self.filename, "ab") as f: |
| f.write(b"\x00" * 50) |
| |
| with gzip.GzipFile(self.filename, "rb") as f: |
| d = f.read() |
| self.assertEqual(d, data1 * 50, "Incorrect data in file") |
| |
| def test_gzip_BadGzipFile_exception(self): |
| self.assertTrue(issubclass(gzip.BadGzipFile, OSError)) |
| |
| def test_bad_gzip_file(self): |
| with open(self.filename, 'wb') as file: |
| file.write(data1 * 50) |
| with gzip.GzipFile(self.filename, 'r') as file: |
| self.assertRaises(gzip.BadGzipFile, file.readlines) |
| |
| def test_non_seekable_file(self): |
| uncompressed = data1 * 50 |
| buf = UnseekableIO() |
| with gzip.GzipFile(fileobj=buf, mode="wb") as f: |
| f.write(uncompressed) |
| compressed = buf.getvalue() |
| buf = UnseekableIO(compressed) |
| with gzip.GzipFile(fileobj=buf, mode="rb") as f: |
| self.assertEqual(f.read(), uncompressed) |
| |
| def test_peek(self): |
| uncompressed = data1 * 200 |
| with gzip.GzipFile(self.filename, "wb") as f: |
| f.write(uncompressed) |
| |
| def sizes(): |
| while True: |
| for n in range(5, 50, 10): |
| yield n |
| |
| with gzip.GzipFile(self.filename, "rb") as f: |
| f.max_read_chunk = 33 |
| nread = 0 |
| for n in sizes(): |
| s = f.peek(n) |
| if s == b'': |
| break |
| self.assertEqual(f.read(len(s)), s) |
| nread += len(s) |
| self.assertEqual(f.read(100), b'') |
| self.assertEqual(nread, len(uncompressed)) |
| |
| def test_textio_readlines(self): |
| # Issue #10791: TextIOWrapper.readlines() fails when wrapping GzipFile. |
| lines = (data1 * 50).decode("ascii").splitlines(keepends=True) |
| self.test_write() |
| with gzip.GzipFile(self.filename, 'r') as f: |
| with io.TextIOWrapper(f, encoding="ascii") as t: |
| self.assertEqual(t.readlines(), lines) |
| |
| def test_fileobj_from_fdopen(self): |
| # Issue #13781: Opening a GzipFile for writing fails when using a |
| # fileobj created with os.fdopen(). |
| fd = os.open(self.filename, os.O_WRONLY | os.O_CREAT) |
| with os.fdopen(fd, "wb") as f: |
| with gzip.GzipFile(fileobj=f, mode="w") as g: |
| pass |
| |
| def test_fileobj_mode(self): |
| gzip.GzipFile(self.filename, "wb").close() |
| with open(self.filename, "r+b") as f: |
| with gzip.GzipFile(fileobj=f, mode='r') as g: |
| self.assertEqual(g.mode, gzip.READ) |
| with gzip.GzipFile(fileobj=f, mode='w') as g: |
| self.assertEqual(g.mode, gzip.WRITE) |
| with gzip.GzipFile(fileobj=f, mode='a') as g: |
| self.assertEqual(g.mode, gzip.WRITE) |
| with gzip.GzipFile(fileobj=f, mode='x') as g: |
| self.assertEqual(g.mode, gzip.WRITE) |
| with self.assertRaises(ValueError): |
| gzip.GzipFile(fileobj=f, mode='z') |
| for mode in "rb", "r+b": |
| with open(self.filename, mode) as f: |
| with gzip.GzipFile(fileobj=f) as g: |
| self.assertEqual(g.mode, gzip.READ) |
| for mode in "wb", "ab", "xb": |
| if "x" in mode: |
| os_helper.unlink(self.filename) |
| with open(self.filename, mode) as f: |
| with self.assertWarns(FutureWarning): |
| g = gzip.GzipFile(fileobj=f) |
| with g: |
| self.assertEqual(g.mode, gzip.WRITE) |
| |
| def test_bytes_filename(self): |
| str_filename = self.filename |
| try: |
| bytes_filename = str_filename.encode("ascii") |
| except UnicodeEncodeError: |
| self.skipTest("Temporary file name needs to be ASCII") |
| with gzip.GzipFile(bytes_filename, "wb") as f: |
| f.write(data1 * 50) |
| with gzip.GzipFile(bytes_filename, "rb") as f: |
| self.assertEqual(f.read(), data1 * 50) |
| # Sanity check that we are actually operating on the right file. |
| with gzip.GzipFile(str_filename, "rb") as f: |
| self.assertEqual(f.read(), data1 * 50) |
| |
| def test_decompress_limited(self): |
| """Decompressed data buffering should be limited""" |
| bomb = gzip.compress(b'\0' * int(2e6), compresslevel=9) |
| self.assertLess(len(bomb), io.DEFAULT_BUFFER_SIZE) |
| |
| bomb = io.BytesIO(bomb) |
| decomp = gzip.GzipFile(fileobj=bomb) |
| self.assertEqual(decomp.read(1), b'\0') |
| max_decomp = 1 + io.DEFAULT_BUFFER_SIZE |
| self.assertLessEqual(decomp._buffer.raw.tell(), max_decomp, |
| "Excessive amount of data was decompressed") |
| |
| # Testing compress/decompress shortcut functions |
| |
| def test_compress(self): |
| for data in [data1, data2]: |
| for args in [(), (1,), (6,), (9,)]: |
| datac = gzip.compress(data, *args) |
| self.assertEqual(type(datac), bytes) |
| with gzip.GzipFile(fileobj=io.BytesIO(datac), mode="rb") as f: |
| self.assertEqual(f.read(), data) |
| |
| def test_compress_mtime(self): |
| mtime = 123456789 |
| for data in [data1, data2]: |
| for args in [(), (1,), (6,), (9,)]: |
| with self.subTest(data=data, args=args): |
| datac = gzip.compress(data, *args, mtime=mtime) |
| self.assertEqual(type(datac), bytes) |
| with gzip.GzipFile(fileobj=io.BytesIO(datac), mode="rb") as f: |
| f.read(1) # to set mtime attribute |
| self.assertEqual(f.mtime, mtime) |
| |
| def test_decompress(self): |
| for data in (data1, data2): |
| buf = io.BytesIO() |
| with gzip.GzipFile(fileobj=buf, mode="wb") as f: |
| f.write(data) |
| self.assertEqual(gzip.decompress(buf.getvalue()), data) |
| # Roundtrip with compress |
| datac = gzip.compress(data) |
| self.assertEqual(gzip.decompress(datac), data) |
| |
| def test_read_truncated(self): |
| data = data1*50 |
| # Drop the CRC (4 bytes) and file size (4 bytes). |
| truncated = gzip.compress(data)[:-8] |
| with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f: |
| self.assertRaises(EOFError, f.read) |
| with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f: |
| self.assertEqual(f.read(len(data)), data) |
| self.assertRaises(EOFError, f.read, 1) |
| # Incomplete 10-byte header. |
| for i in range(2, 10): |
| with gzip.GzipFile(fileobj=io.BytesIO(truncated[:i])) as f: |
| self.assertRaises(EOFError, f.read, 1) |
| |
| def test_read_with_extra(self): |
| # Gzip data with an extra field |
| gzdata = (b'\x1f\x8b\x08\x04\xb2\x17cQ\x02\xff' |
| b'\x05\x00Extra' |
| b'\x0bI-.\x01\x002\xd1Mx\x04\x00\x00\x00') |
| with gzip.GzipFile(fileobj=io.BytesIO(gzdata)) as f: |
| self.assertEqual(f.read(), b'Test') |
| |
| def test_prepend_error(self): |
| # See issue #20875 |
| with gzip.open(self.filename, "wb") as f: |
| f.write(data1) |
| with gzip.open(self.filename, "rb") as f: |
| f._buffer.raw._fp.prepend() |
| |
| def test_issue44439(self): |
| q = array.array('Q', [1, 2, 3, 4, 5]) |
| LENGTH = len(q) * q.itemsize |
| |
| with gzip.GzipFile(fileobj=io.BytesIO(), mode='w') as f: |
| self.assertEqual(f.write(q), LENGTH) |
| self.assertEqual(f.tell(), LENGTH) |
| |
| |
| class TestOpen(BaseTest): |
| def test_binary_modes(self): |
| uncompressed = data1 * 50 |
| |
| with gzip.open(self.filename, "wb") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()) |
| self.assertEqual(file_data, uncompressed) |
| |
| with gzip.open(self.filename, "rb") as f: |
| self.assertEqual(f.read(), uncompressed) |
| |
| with gzip.open(self.filename, "ab") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()) |
| self.assertEqual(file_data, uncompressed * 2) |
| |
| with self.assertRaises(FileExistsError): |
| gzip.open(self.filename, "xb") |
| os_helper.unlink(self.filename) |
| with gzip.open(self.filename, "xb") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()) |
| self.assertEqual(file_data, uncompressed) |
| |
| def test_pathlike_file(self): |
| filename = pathlib.Path(self.filename) |
| with gzip.open(filename, "wb") as f: |
| f.write(data1 * 50) |
| with gzip.open(filename, "ab") as f: |
| f.write(data1) |
| with gzip.open(filename) as f: |
| self.assertEqual(f.read(), data1 * 51) |
| |
| def test_implicit_binary_modes(self): |
| # Test implicit binary modes (no "b" or "t" in mode string). |
| uncompressed = data1 * 50 |
| |
| with gzip.open(self.filename, "w") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()) |
| self.assertEqual(file_data, uncompressed) |
| |
| with gzip.open(self.filename, "r") as f: |
| self.assertEqual(f.read(), uncompressed) |
| |
| with gzip.open(self.filename, "a") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()) |
| self.assertEqual(file_data, uncompressed * 2) |
| |
| with self.assertRaises(FileExistsError): |
| gzip.open(self.filename, "x") |
| os_helper.unlink(self.filename) |
| with gzip.open(self.filename, "x") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()) |
| self.assertEqual(file_data, uncompressed) |
| |
| def test_text_modes(self): |
| uncompressed = data1.decode("ascii") * 50 |
| uncompressed_raw = uncompressed.replace("\n", os.linesep) |
| with gzip.open(self.filename, "wt", encoding="ascii") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()).decode("ascii") |
| self.assertEqual(file_data, uncompressed_raw) |
| with gzip.open(self.filename, "rt", encoding="ascii") as f: |
| self.assertEqual(f.read(), uncompressed) |
| with gzip.open(self.filename, "at", encoding="ascii") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()).decode("ascii") |
| self.assertEqual(file_data, uncompressed_raw * 2) |
| |
| def test_fileobj(self): |
| uncompressed_bytes = data1 * 50 |
| uncompressed_str = uncompressed_bytes.decode("ascii") |
| compressed = gzip.compress(uncompressed_bytes) |
| with gzip.open(io.BytesIO(compressed), "r") as f: |
| self.assertEqual(f.read(), uncompressed_bytes) |
| with gzip.open(io.BytesIO(compressed), "rb") as f: |
| self.assertEqual(f.read(), uncompressed_bytes) |
| with gzip.open(io.BytesIO(compressed), "rt", encoding="ascii") as f: |
| self.assertEqual(f.read(), uncompressed_str) |
| |
| def test_bad_params(self): |
| # Test invalid parameter combinations. |
| with self.assertRaises(TypeError): |
| gzip.open(123.456) |
| with self.assertRaises(ValueError): |
| gzip.open(self.filename, "wbt") |
| with self.assertRaises(ValueError): |
| gzip.open(self.filename, "xbt") |
| with self.assertRaises(ValueError): |
| gzip.open(self.filename, "rb", encoding="utf-8") |
| with self.assertRaises(ValueError): |
| gzip.open(self.filename, "rb", errors="ignore") |
| with self.assertRaises(ValueError): |
| gzip.open(self.filename, "rb", newline="\n") |
| |
| def test_encoding(self): |
| # Test non-default encoding. |
| uncompressed = data1.decode("ascii") * 50 |
| uncompressed_raw = uncompressed.replace("\n", os.linesep) |
| with gzip.open(self.filename, "wt", encoding="utf-16") as f: |
| f.write(uncompressed) |
| with open(self.filename, "rb") as f: |
| file_data = gzip.decompress(f.read()).decode("utf-16") |
| self.assertEqual(file_data, uncompressed_raw) |
| with gzip.open(self.filename, "rt", encoding="utf-16") as f: |
| self.assertEqual(f.read(), uncompressed) |
| |
| def test_encoding_error_handler(self): |
| # Test with non-default encoding error handler. |
| with gzip.open(self.filename, "wb") as f: |
| f.write(b"foo\xffbar") |
| with gzip.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). |
| uncompressed = data1.decode("ascii") * 50 |
| with gzip.open(self.filename, "wt", encoding="ascii", newline="\n") as f: |
| f.write(uncompressed) |
| with gzip.open(self.filename, "rt", encoding="ascii", newline="\r") as f: |
| self.assertEqual(f.readlines(), [uncompressed]) |
| |
| |
| def create_and_remove_directory(directory): |
| def decorator(function): |
| @functools.wraps(function) |
| def wrapper(*args, **kwargs): |
| os.makedirs(directory) |
| try: |
| return function(*args, **kwargs) |
| finally: |
| os_helper.rmtree(directory) |
| return wrapper |
| return decorator |
| |
| |
| class TestCommandLine(unittest.TestCase): |
| data = b'This is a simple test with gzip' |
| |
| def test_decompress_stdin_stdout(self): |
| with io.BytesIO() as bytes_io: |
| with gzip.GzipFile(fileobj=bytes_io, mode='wb') as gzip_file: |
| gzip_file.write(self.data) |
| |
| args = sys.executable, '-m', 'gzip', '-d' |
| with Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE) as proc: |
| out, err = proc.communicate(bytes_io.getvalue()) |
| |
| self.assertEqual(err, b'') |
| self.assertEqual(out, self.data) |
| |
| @create_and_remove_directory(TEMPDIR) |
| def test_decompress_infile_outfile(self): |
| gzipname = os.path.join(TEMPDIR, 'testgzip.gz') |
| self.assertFalse(os.path.exists(gzipname)) |
| |
| with gzip.open(gzipname, mode='wb') as fp: |
| fp.write(self.data) |
| rc, out, err = assert_python_ok('-m', 'gzip', '-d', gzipname) |
| |
| with open(os.path.join(TEMPDIR, "testgzip"), "rb") as gunziped: |
| self.assertEqual(gunziped.read(), self.data) |
| |
| self.assertTrue(os.path.exists(gzipname)) |
| self.assertEqual(rc, 0) |
| self.assertEqual(out, b'') |
| self.assertEqual(err, b'') |
| |
| def test_decompress_infile_outfile_error(self): |
| rc, out, err = assert_python_failure('-m', 'gzip', '-d', 'thisisatest.out') |
| self.assertEqual(b"filename doesn't end in .gz: 'thisisatest.out'", err.strip()) |
| self.assertEqual(rc, 1) |
| self.assertEqual(out, b'') |
| |
| @create_and_remove_directory(TEMPDIR) |
| def test_compress_stdin_outfile(self): |
| args = sys.executable, '-m', 'gzip' |
| with Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE) as proc: |
| out, err = proc.communicate(self.data) |
| |
| self.assertEqual(err, b'') |
| self.assertEqual(out[:2], b"\x1f\x8b") |
| |
| @create_and_remove_directory(TEMPDIR) |
| def test_compress_infile_outfile_default(self): |
| local_testgzip = os.path.join(TEMPDIR, 'testgzip') |
| gzipname = local_testgzip + '.gz' |
| self.assertFalse(os.path.exists(gzipname)) |
| |
| with open(local_testgzip, 'wb') as fp: |
| fp.write(self.data) |
| |
| rc, out, err = assert_python_ok('-m', 'gzip', local_testgzip) |
| |
| self.assertTrue(os.path.exists(gzipname)) |
| self.assertEqual(out, b'') |
| self.assertEqual(err, b'') |
| |
| @create_and_remove_directory(TEMPDIR) |
| def test_compress_infile_outfile(self): |
| for compress_level in ('--fast', '--best'): |
| with self.subTest(compress_level=compress_level): |
| local_testgzip = os.path.join(TEMPDIR, 'testgzip') |
| gzipname = local_testgzip + '.gz' |
| self.assertFalse(os.path.exists(gzipname)) |
| |
| with open(local_testgzip, 'wb') as fp: |
| fp.write(self.data) |
| |
| rc, out, err = assert_python_ok('-m', 'gzip', compress_level, local_testgzip) |
| |
| self.assertTrue(os.path.exists(gzipname)) |
| self.assertEqual(out, b'') |
| self.assertEqual(err, b'') |
| os.remove(gzipname) |
| self.assertFalse(os.path.exists(gzipname)) |
| |
| def test_compress_fast_best_are_exclusive(self): |
| rc, out, err = assert_python_failure('-m', 'gzip', '--fast', '--best') |
| self.assertIn(b"error: argument --best: not allowed with argument --fast", err) |
| self.assertEqual(out, b'') |
| |
| def test_decompress_cannot_have_flags_compression(self): |
| rc, out, err = assert_python_failure('-m', 'gzip', '--fast', '-d') |
| self.assertIn(b'error: argument -d/--decompress: not allowed with argument --fast', err) |
| self.assertEqual(out, b'') |
| |
| |
| if __name__ == "__main__": |
| unittest.main() |
