mirror of https://github.com/python/cpython
83 lines
1.8 KiB
Python
83 lines
1.8 KiB
Python
from test_support import verify
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import sys, os
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import gzip, tempfile
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filename = tempfile.mktemp()
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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.cdrom.com/pub/infozip/zlib/ */
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/* See http://www.winimage.com/zLibDll for Windows */
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"""
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f = gzip.GzipFile(filename, 'wb') ; f.write(data1 * 50) ; f.close()
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f = gzip.GzipFile(filename, 'r') ; d = f.read() ; f.close()
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verify(d == data1*50)
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# Append to the previous file
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f = gzip.GzipFile(filename, 'ab') ; f.write(data2 * 15) ; f.close()
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f = gzip.GzipFile(filename, 'rb') ; d = f.read() ; f.close()
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verify(d == (data1*50) + (data2*15))
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# Try .readline() with varying line lengths
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f = gzip.GzipFile(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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verify(len(L) <= line_length)
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line_length = (line_length + 1) % 50
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f.close()
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# Try .readlines()
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f = gzip.GzipFile(filename, 'rb')
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L = f.readlines()
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f.close()
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f = gzip.GzipFile(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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# Try seek, read test
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f = gzip.GzipFile(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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verify(line1[:amount] == line2)
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f.seek(newpos) # positive seek
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f.close()
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# Try seek, write test
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f = gzip.GzipFile(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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f = gzip.GzipFile(filename, 'r')
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verify(f.myfileobj.mode == 'rb')
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f.close()
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os.unlink(filename)
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