mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-09-26 18:29:57 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

Implement #7944. Use with throughout the test suite.

Browse source
This commit is contained in:
Brian Curtin 2010-10-13 02:21:42 +00:00
parent 01e3979757
commit 28f96b5b26
1 changed files with 104 additions and 117 deletions
Download patch file Download diff file Expand all files Collapse all files

221
Lib/test/test_gzip.py
View file

@ -44,14 +44,15 @@ class TestGzip(unittest.TestCase):
def test_write(self): def test_write(self):
f = gzip.GzipFile(self.filename, 'wb') ; f.write(data1 * 50) with gzip.GzipFile(self.filename, 'wb') as f:
f.write(data1 * 50)
# Try flush and fileno. # Try flush and fileno.
f.flush() f.flush()
f.fileno() f.fileno()
if hasattr(os, 'fsync'): if hasattr(os, 'fsync'):
os.fsync(f.fileno()) os.fsync(f.fileno())
f.close() f.close()
# Test multiple close() calls. # Test multiple close() calls.
f.close() f.close()
@ -59,7 +60,8 @@ class TestGzip(unittest.TestCase):
def test_read(self): def test_read(self):
self.test_write() self.test_write()
# Try reading. # Try reading.
f = gzip.GzipFile(self.filename, 'r') ; d = f.read() ; f.close() with gzip.GzipFile(self.filename, 'r') as f:
d = f.read()
self.assertEqual(d, data1*50) self.assertEqual(d, data1*50)
def test_io_on_closed_object(self): def test_io_on_closed_object(self):
@ -87,31 +89,30 @@ class TestGzip(unittest.TestCase):
def test_append(self): def test_append(self):
self.test_write() self.test_write()
# Append to the previous file # Append to the previous file
f = gzip.GzipFile(self.filename, 'ab') ; f.write(data2 * 15) ; f.close() with gzip.GzipFile(self.filename, 'ab') as f:
f.write(data2 * 15)
f = gzip.GzipFile(self.filename, 'rb') ; d = f.read() ; f.close() with gzip.GzipFile(self.filename, 'rb') as f:
d = f.read()
self.assertEqual(d, (data1*50) + (data2*15)) self.assertEqual(d, (data1*50) + (data2*15))
def test_many_append(self): def test_many_append(self):
# Bug #1074261 was triggered when reading a file that contained # Bug #1074261 was triggered when reading a file that contained
# many, many members. Create such a file and verify that reading it # many, many members. Create such a file and verify that reading it
# works. # works.
f = gzip.open(self.filename, 'wb', 9) with gzip.open(self.filename, 'wb', 9) as f:
f.write(b'a')
f.close()
for i in range(0, 200):
f = gzip.open(self.filename, "ab", 9) # append
f.write(b'a') f.write(b'a')
f.close() for i in range(0, 200):
with gzip.open(self.filename, "ab", 9) as f: # append
f.write(b'a')
# Try reading the file # Try reading the file
zgfile = gzip.open(self.filename, "rb") with gzip.open(self.filename, "rb") as zgfile:
contents = b"" contents = b""
while 1: while 1:
ztxt = zgfile.read(8192) ztxt = zgfile.read(8192)
contents += ztxt contents += ztxt
if not ztxt: break if not ztxt: break
zgfile.close()
self.assertEquals(contents, b'a'*201) self.assertEquals(contents, b'a'*201)
def test_buffered_reader(self): def test_buffered_reader(self):
@ -119,9 +120,9 @@ class TestGzip(unittest.TestCase):
# performance. # performance.
self.test_write() self.test_write()
f = gzip.GzipFile(self.filename, 'rb') with gzip.GzipFile(self.filename, 'rb') as f:
with io.BufferedReader(f) as r: with io.BufferedReader(f) as r:
lines = [line for line in r] lines = [line for line in r]
self.assertEqual(lines, 50 * data1.splitlines(True)) self.assertEqual(lines, 50 * data1.splitlines(True))
@ -129,141 +130,127 @@ class TestGzip(unittest.TestCase):
self.test_write() self.test_write()
# Try .readline() with varying line lengths # Try .readline() with varying line lengths
f = gzip.GzipFile(self.filename, 'rb') with gzip.GzipFile(self.filename, 'rb') as f:
line_length = 0 line_length = 0
while 1: while 1:
L = f.readline(line_length) L = f.readline(line_length)
if not L and line_length != 0: break if not L and line_length != 0: break
self.assertTrue(len(L) <= line_length) self.assertTrue(len(L) <= line_length)
line_length = (line_length + 1) % 50 line_length = (line_length + 1) % 50
f.close()
def test_readlines(self): def test_readlines(self):
self.test_write() self.test_write()
# Try .readlines() # Try .readlines()
f = gzip.GzipFile(self.filename, 'rb') with gzip.GzipFile(self.filename, 'rb') as f:
L = f.readlines() L = f.readlines()
f.close()
f = gzip.GzipFile(self.filename, 'rb') with gzip.GzipFile(self.filename, 'rb') as f:
while 1: while 1:
L = f.readlines(150) L = f.readlines(150)
if L == []: break if L == []: break
f.close()
def test_seek_read(self): def test_seek_read(self):
self.test_write() self.test_write()
# Try seek, read test # Try seek, read test
f = gzip.GzipFile(self.filename) with gzip.GzipFile(self.filename) as f:
while 1: while 1:
oldpos = f.tell() oldpos = f.tell()
line1 = f.readline() line1 = f.readline()
if not line1: break if not line1: break
newpos = f.tell() newpos = f.tell()
f.seek(oldpos) # negative seek f.seek(oldpos) # negative seek
if len(line1)>10: if len(line1)>10:
amount = 10 amount = 10
else: else:
amount = len(line1) amount = len(line1)
line2 = f.read(amount) line2 = f.read(amount)
self.assertEqual(line1[:amount], line2) self.assertEqual(line1[:amount], line2)
f.seek(newpos) # positive seek f.seek(newpos) # positive seek
f.close()
def test_seek_whence(self): def test_seek_whence(self):
self.test_write() self.test_write()
# Try seek(whence=1), read test # Try seek(whence=1), read test
f = gzip.GzipFile(self.filename) with gzip.GzipFile(self.filename) as f:
f.read(10) f.read(10)
f.seek(10, whence=1) f.seek(10, whence=1)
y = f.read(10) y = f.read(10)
f.close()
self.assertEquals(y, data1[20:30]) self.assertEquals(y, data1[20:30])
def test_seek_write(self): def test_seek_write(self):
# Try seek, write test # Try seek, write test
f = gzip.GzipFile(self.filename, 'w') with gzip.GzipFile(self.filename, 'w') as f:
for pos in range(0, 256, 16): for pos in range(0, 256, 16):
f.seek(pos) f.seek(pos)
f.write(b'GZ\n') f.write(b'GZ\n')
f.close()
def test_mode(self): def test_mode(self):
self.test_write() self.test_write()
f = gzip.GzipFile(self.filename, 'r') with gzip.GzipFile(self.filename, 'r') as f:
self.assertEqual(f.myfileobj.mode, 'rb') self.assertEqual(f.myfileobj.mode, 'rb')
f.close()
def test_1647484(self): def test_1647484(self):
for mode in ('wb', 'rb'): for mode in ('wb', 'rb'):
f = gzip.GzipFile(self.filename, mode) with gzip.GzipFile(self.filename, mode) as f:
self.assertTrue(hasattr(f, "name")) self.assertTrue(hasattr(f, "name"))
self.assertEqual(f.name, self.filename) self.assertEqual(f.name, self.filename)
f.close()
def test_mtime(self): def test_mtime(self):
mtime = 123456789 mtime = 123456789
fWrite = gzip.GzipFile(self.filename, 'w', mtime = mtime) with gzip.GzipFile(self.filename, 'w', mtime = mtime) as fWrite:
fWrite.write(data1) fWrite.write(data1)
fWrite.close() with gzip.GzipFile(self.filename) as fRead:
fRead = gzip.GzipFile(self.filename) dataRead = fRead.read()
dataRead = fRead.read() self.assertEqual(dataRead, data1)
self.assertEqual(dataRead, data1) self.assertTrue(hasattr(fRead, 'mtime'))
self.assertTrue(hasattr(fRead, 'mtime')) self.assertEqual(fRead.mtime, mtime)
self.assertEqual(fRead.mtime, mtime)
fRead.close()
def test_metadata(self): def test_metadata(self):
mtime = 123456789 mtime = 123456789
fWrite = gzip.GzipFile(self.filename, 'w', mtime = mtime) with gzip.GzipFile(self.filename, 'w', mtime = mtime) as fWrite:
fWrite.write(data1) fWrite.write(data1)
fWrite.close()
fRead = open(self.filename, 'rb') with open(self.filename, 'rb') as fRead:
# see RFC 1952: http://www.faqs.org/rfcs/rfc1952.html
# see RFC 1952: http://www.faqs.org/rfcs/rfc1952.html idBytes = fRead.read(2)
self.assertEqual(idBytes, b'\x1f\x8b') # gzip ID
idBytes = fRead.read(2) cmByte = fRead.read(1)
self.assertEqual(idBytes, b'\x1f\x8b') # gzip ID self.assertEqual(cmByte, b'\x08') # deflate
cmByte = fRead.read(1) flagsByte = fRead.read(1)
self.assertEqual(cmByte, b'\x08') # deflate self.assertEqual(flagsByte, b'\x08') # only the FNAME flag is set
flagsByte = fRead.read(1) mtimeBytes = fRead.read(4)
self.assertEqual(flagsByte, b'\x08') # only the FNAME flag is set self.assertEqual(mtimeBytes, struct.pack('<i', mtime)) # little-endian
mtimeBytes = fRead.read(4) xflByte = fRead.read(1)
self.assertEqual(mtimeBytes, struct.pack('<i', mtime)) # little-endian self.assertEqual(xflByte, b'\x02') # maximum compression
xflByte = fRead.read(1) osByte = fRead.read(1)
self.assertEqual(xflByte, b'\x02') # maximum compression self.assertEqual(osByte, b'\xff') # OS "unknown" (OS-independent)
osByte = fRead.read(1) # Since the FNAME flag is set, the zero-terminated filename follows.
self.assertEqual(osByte, b'\xff') # OS "unknown" (OS-independent) # 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.
expected = self.filename.encode('Latin-1') + b'\x00'
nameBytes = fRead.read(len(expected))
self.assertEqual(nameBytes, expected)
# Since the FNAME flag is set, the zero-terminated filename follows. # Since no other flags were set, the header ends here.
# RFC 1952 specifies that this is the name of the input file, if any. # Rather than process the compressed data, let's seek to the trailer.
# However, the gzip module defaults to storing the name of the output fRead.seek(os.stat(self.filename).st_size - 8)
# file in this field.
expected = self.filename.encode('Latin-1') + b'\x00'
nameBytes = fRead.read(len(expected))
self.assertEqual(nameBytes, expected)
# Since no other flags were set, the header ends here. crc32Bytes = fRead.read(4) # CRC32 of uncompressed data [data1]
# Rather than process the compressed data, let's seek to the trailer. self.assertEqual(crc32Bytes, b'\xaf\xd7d\x83')
fRead.seek(os.stat(self.filename).st_size - 8)
crc32Bytes = fRead.read(4) # CRC32 of uncompressed data [data1] isizeBytes = fRead.read(4)
self.assertEqual(crc32Bytes, b'\xaf\xd7d\x83') self.assertEqual(isizeBytes, struct.pack('<i', len(data1)))
isizeBytes = fRead.read(4)
self.assertEqual(isizeBytes, struct.pack('<i', len(data1)))
fRead.close()
def test_with_open(self): def test_with_open(self):
# GzipFile supports the context management protocol # GzipFile supports the context management protocol