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#! /usr/bin/env python
"""Test script for the gzip module.
"""
import unittest
from test import test_support
import sys, os
import gzip
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 */
"""
class TestGzip(unittest.TestCase):
filename = test_support.TESTFN
def setUp (self):
pass
def tearDown (self):
try:
os.unlink(self.filename)
except os.error:
pass
def test_write (self):
f = gzip.GzipFile(self.filename, 'wb') ; f.write(data1 * 50)
# Try flush and fileno.
f.flush()
f.fileno()
if hasattr(os, 'fsync'):
os.fsync(f.fileno())
f.close()
def test_read(self):
self.test_write()
# Try reading.
f = gzip.GzipFile(self.filename, 'r') ; d = f.read() ; f.close()
self.assertEqual(d, data1*50)
def test_append(self):
self.test_write()
# Append to the previous file
f = gzip.GzipFile(self.filename, 'ab') ; f.write(data2 * 15) ; f.close()
f = gzip.GzipFile(self.filename, 'rb') ; d = f.read() ; f.close()
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.
f = gzip.open(self.filename, 'wb', 9)
f.write('a')
f.close()
for i in range(0,200):
f = gzip.open(self.filename, "ab", 9) # append
f.write('a')
f.close()
# Try reading the file
zgfile = gzip.open(self.filename, "rb")
contents = ""
while 1:
ztxt = zgfile.read(8192)
contents += ztxt
if not ztxt: break
zgfile.close()
self.assertEquals(contents, 'a'*201)
def test_readline(self):
self.test_write()
# Try .readline() with varying line lengths
f = gzip.GzipFile(self.filename, 'rb')
line_length = 0
while 1:
L = f.readline(line_length)
if L == "" and line_length != 0: break
self.assert_(len(L) <= line_length)
line_length = (line_length + 1) % 50
f.close()
def test_readlines(self):
self.test_write()
# Try .readlines()
f = gzip.GzipFile(self.filename, 'rb')
L = f.readlines()
f.close()
f = gzip.GzipFile(self.filename, 'rb')
while 1:
L = f.readlines(150)
if L == []: break
f.close()
def test_seek_read(self):
self.test_write()
# Try seek, read test
f = gzip.GzipFile(self.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)
self.assertEqual(line1[:amount], line2)
f.seek(newpos) # positive seek
f.close()
def test_seek_write(self):
# Try seek, write test
f = gzip.GzipFile(self.filename, 'w')
for pos in range(0, 256, 16):
f.seek(pos)
f.write('GZ\n')
f.close()
def test_mode(self):
self.test_write()
f = gzip.GzipFile(self.filename, 'r')
self.assertEqual(f.myfileobj.mode, 'rb')
f.close()
def test_main(verbose=None):
test_support.run_unittest(TestGzip)
if __name__ == "__main__":
test_main(verbose=True)
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