mirror of https://github.com/python/cpython
161 lines
4.1 KiB
Python
161 lines
4.1 KiB
Python
#! /usr/bin/env python
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"""Test script for the gzip module.
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"""
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import unittest
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from test import test_support
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import sys, os
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import gzip
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data1 = """ int length=DEFAULTALLOC, err = Z_OK;
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PyObject *RetVal;
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int flushmode = Z_FINISH;
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unsigned long start_total_out;
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"""
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data2 = """/* zlibmodule.c -- gzip-compatible data compression */
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/* See http://www.gzip.org/zlib/
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/* See http://www.winimage.com/zLibDll for Windows */
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"""
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class TestGzip(unittest.TestCase):
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filename = test_support.TESTFN
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def setUp (self):
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pass
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def tearDown (self):
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try:
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os.unlink(self.filename)
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except os.error:
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pass
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def test_write (self):
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f = gzip.GzipFile(self.filename, 'wb') ; f.write(data1 * 50)
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# Try flush and fileno.
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f.flush()
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f.fileno()
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if hasattr(os, 'fsync'):
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os.fsync(f.fileno())
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f.close()
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def test_read(self):
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self.test_write()
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# Try reading.
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f = gzip.GzipFile(self.filename, 'r') ; d = f.read() ; f.close()
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self.assertEqual(d, data1*50)
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def test_append(self):
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self.test_write()
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# Append to the previous file
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f = gzip.GzipFile(self.filename, 'ab') ; f.write(data2 * 15) ; f.close()
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f = gzip.GzipFile(self.filename, 'rb') ; d = f.read() ; f.close()
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self.assertEqual(d, (data1*50) + (data2*15))
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def test_many_append(self):
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# Bug #1074261 was triggered when reading a file that contained
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# many, many members. Create such a file and verify that reading it
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# works.
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f = gzip.open(self.filename, 'wb', 9)
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f.write('a')
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f.close()
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for i in range(0,200):
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f = gzip.open(self.filename, "ab", 9) # append
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f.write('a')
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f.close()
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# Try reading the file
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zgfile = gzip.open(self.filename, "rb")
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contents = ""
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while 1:
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ztxt = zgfile.read(8192)
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contents += ztxt
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if not ztxt: break
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zgfile.close()
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self.assertEquals(contents, 'a'*201)
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def test_readline(self):
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self.test_write()
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# Try .readline() with varying line lengths
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f = gzip.GzipFile(self.filename, 'rb')
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line_length = 0
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while 1:
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L = f.readline(line_length)
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if L == "" and line_length != 0: break
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self.assert_(len(L) <= line_length)
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line_length = (line_length + 1) % 50
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f.close()
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def test_readlines(self):
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self.test_write()
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# Try .readlines()
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f = gzip.GzipFile(self.filename, 'rb')
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L = f.readlines()
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f.close()
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f = gzip.GzipFile(self.filename, 'rb')
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while 1:
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L = f.readlines(150)
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if L == []: break
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f.close()
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def test_seek_read(self):
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self.test_write()
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# Try seek, read test
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f = gzip.GzipFile(self.filename)
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while 1:
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oldpos = f.tell()
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line1 = f.readline()
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if not line1: break
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newpos = f.tell()
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f.seek(oldpos) # negative seek
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if len(line1)>10:
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amount = 10
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else:
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amount = len(line1)
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line2 = f.read(amount)
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self.assertEqual(line1[:amount], line2)
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f.seek(newpos) # positive seek
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f.close()
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def test_seek_whence(self):
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self.test_write()
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# Try seek(whence=1), read test
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f = gzip.GzipFile(self.filename)
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f.read(10)
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f.seek(10, whence=1)
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y = f.read(10)
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f.close()
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self.assertEquals(y, data1[20:30])
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def test_seek_write(self):
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# Try seek, write test
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f = gzip.GzipFile(self.filename, 'w')
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for pos in range(0, 256, 16):
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f.seek(pos)
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f.write('GZ\n')
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f.close()
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def test_mode(self):
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self.test_write()
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f = gzip.GzipFile(self.filename, 'r')
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self.assertEqual(f.myfileobj.mode, 'rb')
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f.close()
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def test_main(verbose=None):
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test_support.run_unittest(TestGzip)
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if __name__ == "__main__":
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test_main(verbose=True)
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