Viewing file:  test_gzip.py (1.86 KB) -rw-r--r--
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from test.test_support import verify, TESTFN
import sys, os
import gzip
filename = TESTFN
data1 = """ int length=DEFAULTALLOC, err = Z_OK;
PyObject *RetVal;
int flushmode = Z_FINISH;
unsigned long start_total_out;
"""
data2 = """/* zlibmodule.c -- gzip-compatible data compression */
/* See http://www.gzip.org/zlib/
/* See http://www.winimage.com/zLibDll for Windows */
"""
f = gzip.GzipFile(filename, 'wb') ; f.write(data1 * 50)
# Try flush and fileno.
f.flush()
f.fileno()
if hasattr(os, 'fsync'):
os.fsync(f.fileno())
f.close()
# Try reading.
f = gzip.GzipFile(filename, 'r') ; d = f.read() ; f.close()
verify(d == data1*50)
# Append to the previous file
f = gzip.GzipFile(filename, 'ab') ; f.write(data2 * 15) ; f.close()
f = gzip.GzipFile(filename, 'rb') ; d = f.read() ; f.close()
verify(d == (data1*50) + (data2*15))
# Try .readline() with varying line lengths
f = gzip.GzipFile(filename, 'rb')
line_length = 0
while 1:
L = f.readline(line_length)
if L == "" and line_length != 0: break
verify(len(L) <= line_length)
line_length = (line_length + 1) % 50
f.close()
# Try .readlines()
f = gzip.GzipFile(filename, 'rb')
L = f.readlines()
f.close()
f = gzip.GzipFile(filename, 'rb')
while 1:
L = f.readlines(150)
if L == []: break
f.close()
# Try seek, read test
f = gzip.GzipFile(filename)
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)
verify(line1[:amount] == line2)
f.seek(newpos) # positive seek
f.close()
# Try seek, write test
f = gzip.GzipFile(filename, 'w')
for pos in range(0, 256, 16):
f.seek(pos)
f.write('GZ\n')
f.close()
f = gzip.GzipFile(filename, 'r')
verify(f.myfileobj.mode == 'rb')
f.close()
os.unlink(filename)
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