diff -r 000000000000 -r ae805ac0140d python-2.5.2/win32/Lib/test/test_mmap.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/python-2.5.2/win32/Lib/test/test_mmap.py Fri Apr 03 17:19:34 2009 +0100 @@ -0,0 +1,395 @@ +from test.test_support import verify, vereq, TESTFN +import mmap +import os, re + +PAGESIZE = mmap.PAGESIZE + +def test_both(): + "Test mmap module on Unix systems and Windows" + + # Create a file to be mmap'ed. + if os.path.exists(TESTFN): + os.unlink(TESTFN) + f = open(TESTFN, 'w+') + + try: # unlink TESTFN no matter what + # Write 2 pages worth of data to the file + f.write('\0'* PAGESIZE) + f.write('foo') + f.write('\0'* (PAGESIZE-3) ) + f.flush() + m = mmap.mmap(f.fileno(), 2 * PAGESIZE) + f.close() + + # Simple sanity checks + + print type(m) # SF bug 128713: segfaulted on Linux + print ' Position of foo:', m.find('foo') / float(PAGESIZE), 'pages' + vereq(m.find('foo'), PAGESIZE) + + print ' Length of file:', len(m) / float(PAGESIZE), 'pages' + vereq(len(m), 2*PAGESIZE) + + print ' Contents of byte 0:', repr(m[0]) + vereq(m[0], '\0') + print ' Contents of first 3 bytes:', repr(m[0:3]) + vereq(m[0:3], '\0\0\0') + + # Modify the file's content + print "\n Modifying file's content..." + m[0] = '3' + m[PAGESIZE +3: PAGESIZE +3+3] = 'bar' + + # Check that the modification worked + print ' Contents of byte 0:', repr(m[0]) + vereq(m[0], '3') + print ' Contents of first 3 bytes:', repr(m[0:3]) + vereq(m[0:3], '3\0\0') + print ' Contents of second page:', repr(m[PAGESIZE-1 : PAGESIZE + 7]) + vereq(m[PAGESIZE-1 : PAGESIZE + 7], '\0foobar\0') + + m.flush() + + # Test doing a regular expression match in an mmap'ed file + match = re.search('[A-Za-z]+', m) + if match is None: + print ' ERROR: regex match on mmap failed!' + else: + start, end = match.span(0) + length = end - start + + print ' Regex match on mmap (page start, length of match):', + print start / float(PAGESIZE), length + + vereq(start, PAGESIZE) + vereq(end, PAGESIZE + 6) + + # test seeking around (try to overflow the seek implementation) + m.seek(0,0) + print ' Seek to zeroth byte' + vereq(m.tell(), 0) + m.seek(42,1) + print ' Seek to 42nd byte' + vereq(m.tell(), 42) + m.seek(0,2) + print ' Seek to last byte' + vereq(m.tell(), len(m)) + + print ' Try to seek to negative position...' + try: + m.seek(-1) + except ValueError: + pass + else: + verify(0, 'expected a ValueError but did not get it') + + print ' Try to seek beyond end of mmap...' + try: + m.seek(1,2) + except ValueError: + pass + else: + verify(0, 'expected a ValueError but did not get it') + + print ' Try to seek to negative position...' + try: + m.seek(-len(m)-1,2) + except ValueError: + pass + else: + verify(0, 'expected a ValueError but did not get it') + + # Try resizing map + print ' Attempting resize()' + try: + m.resize(512) + except SystemError: + # resize() not supported + # No messages are printed, since the output of this test suite + # would then be different across platforms. + pass + else: + # resize() is supported + verify(len(m) == 512, + "len(m) is %d, but expecting 512" % (len(m),) ) + # Check that we can no longer seek beyond the new size. + try: + m.seek(513,0) + except ValueError: + pass + else: + verify(0, 'Could seek beyond the new size') + + # Check that the underlying file is truncated too + # (bug #728515) + f = open(TESTFN) + f.seek(0, 2) + verify(f.tell() == 512, 'Underlying file not truncated') + f.close() + verify(m.size() == 512, 'New size not reflected in file') + + m.close() + + finally: + try: + f.close() + except OSError: + pass + try: + os.unlink(TESTFN) + except OSError: + pass + + # Test for "access" keyword parameter + try: + mapsize = 10 + print " Creating", mapsize, "byte test data file." + open(TESTFN, "wb").write("a"*mapsize) + print " Opening mmap with access=ACCESS_READ" + f = open(TESTFN, "rb") + m = mmap.mmap(f.fileno(), mapsize, access=mmap.ACCESS_READ) + verify(m[:] == 'a'*mapsize, "Readonly memory map data incorrect.") + + print " Ensuring that readonly mmap can't be slice assigned." + try: + m[:] = 'b'*mapsize + except TypeError: + pass + else: + verify(0, "Able to write to readonly memory map") + + print " Ensuring that readonly mmap can't be item assigned." + try: + m[0] = 'b' + except TypeError: + pass + else: + verify(0, "Able to write to readonly memory map") + + print " Ensuring that readonly mmap can't be write() to." + try: + m.seek(0,0) + m.write('abc') + except TypeError: + pass + else: + verify(0, "Able to write to readonly memory map") + + print " Ensuring that readonly mmap can't be write_byte() to." + try: + m.seek(0,0) + m.write_byte('d') + except TypeError: + pass + else: + verify(0, "Able to write to readonly memory map") + + print " Ensuring that readonly mmap can't be resized." + try: + m.resize(2*mapsize) + except SystemError: # resize is not universally supported + pass + except TypeError: + pass + else: + verify(0, "Able to resize readonly memory map") + del m, f + verify(open(TESTFN, "rb").read() == 'a'*mapsize, + "Readonly memory map data file was modified") + + print " Opening mmap with size too big" + import sys + f = open(TESTFN, "r+b") + try: + m = mmap.mmap(f.fileno(), mapsize+1) + except ValueError: + # we do not expect a ValueError on Windows + # CAUTION: This also changes the size of the file on disk, and + # later tests assume that the length hasn't changed. We need to + # repair that. + if sys.platform.startswith('win'): + verify(0, "Opening mmap with size+1 should work on Windows.") + else: + # we expect a ValueError on Unix, but not on Windows + if not sys.platform.startswith('win'): + verify(0, "Opening mmap with size+1 should raise ValueError.") + m.close() + f.close() + if sys.platform.startswith('win'): + # Repair damage from the resizing test. + f = open(TESTFN, 'r+b') + f.truncate(mapsize) + f.close() + + print " Opening mmap with access=ACCESS_WRITE" + f = open(TESTFN, "r+b") + m = mmap.mmap(f.fileno(), mapsize, access=mmap.ACCESS_WRITE) + print " Modifying write-through memory map." + m[:] = 'c'*mapsize + verify(m[:] == 'c'*mapsize, + "Write-through memory map memory not updated properly.") + m.flush() + m.close() + f.close() + f = open(TESTFN, 'rb') + stuff = f.read() + f.close() + verify(stuff == 'c'*mapsize, + "Write-through memory map data file not updated properly.") + + print " Opening mmap with access=ACCESS_COPY" + f = open(TESTFN, "r+b") + m = mmap.mmap(f.fileno(), mapsize, access=mmap.ACCESS_COPY) + print " Modifying copy-on-write memory map." + m[:] = 'd'*mapsize + verify(m[:] == 'd' * mapsize, + "Copy-on-write memory map data not written correctly.") + m.flush() + verify(open(TESTFN, "rb").read() == 'c'*mapsize, + "Copy-on-write test data file should not be modified.") + try: + print " Ensuring copy-on-write maps cannot be resized." + m.resize(2*mapsize) + except TypeError: + pass + else: + verify(0, "Copy-on-write mmap resize did not raise exception.") + del m, f + try: + print " Ensuring invalid access parameter raises exception." + f = open(TESTFN, "r+b") + m = mmap.mmap(f.fileno(), mapsize, access=4) + except ValueError: + pass + else: + verify(0, "Invalid access code should have raised exception.") + + if os.name == "posix": + # Try incompatible flags, prot and access parameters. + f = open(TESTFN, "r+b") + try: + m = mmap.mmap(f.fileno(), mapsize, flags=mmap.MAP_PRIVATE, + prot=mmap.PROT_READ, access=mmap.ACCESS_WRITE) + except ValueError: + pass + else: + verify(0, "Incompatible parameters should raise ValueError.") + f.close() + finally: + try: + os.unlink(TESTFN) + except OSError: + pass + + print ' Try opening a bad file descriptor...' + try: + mmap.mmap(-2, 4096) + except mmap.error: + pass + else: + verify(0, 'expected a mmap.error but did not get it') + + # Do a tougher .find() test. SF bug 515943 pointed out that, in 2.2, + # searching for data with embedded \0 bytes didn't work. + f = open(TESTFN, 'w+') + + try: # unlink TESTFN no matter what + data = 'aabaac\x00deef\x00\x00aa\x00' + n = len(data) + f.write(data) + f.flush() + m = mmap.mmap(f.fileno(), n) + f.close() + + for start in range(n+1): + for finish in range(start, n+1): + slice = data[start : finish] + vereq(m.find(slice), data.find(slice)) + vereq(m.find(slice + 'x'), -1) + m.close() + + finally: + os.unlink(TESTFN) + + # make sure a double close doesn't crash on Solaris (Bug# 665913) + f = open(TESTFN, 'w+') + + try: # unlink TESTFN no matter what + f.write(2**16 * 'a') # Arbitrary character + f.close() + + f = open(TESTFN) + mf = mmap.mmap(f.fileno(), 2**16, access=mmap.ACCESS_READ) + mf.close() + mf.close() + f.close() + + finally: + os.unlink(TESTFN) + + # test mapping of entire file by passing 0 for map length + if hasattr(os, "stat"): + print " Ensuring that passing 0 as map length sets map size to current file size." + f = open(TESTFN, "w+") + + try: + f.write(2**16 * 'm') # Arbitrary character + f.close() + + f = open(TESTFN, "rb+") + mf = mmap.mmap(f.fileno(), 0) + verify(len(mf) == 2**16, "Map size should equal file size.") + vereq(mf.read(2**16), 2**16 * "m") + mf.close() + f.close() + + finally: + os.unlink(TESTFN) + + # test mapping of entire file by passing 0 for map length + if hasattr(os, "stat"): + print " Ensuring that passing 0 as map length sets map size to current file size." + f = open(TESTFN, "w+") + try: + f.write(2**16 * 'm') # Arbitrary character + f.close() + + f = open(TESTFN, "rb+") + mf = mmap.mmap(f.fileno(), 0) + verify(len(mf) == 2**16, "Map size should equal file size.") + vereq(mf.read(2**16), 2**16 * "m") + mf.close() + f.close() + + finally: + os.unlink(TESTFN) + + # make move works everywhere (64-bit format problem earlier) + f = open(TESTFN, 'w+') + + try: # unlink TESTFN no matter what + f.write("ABCDEabcde") # Arbitrary character + f.flush() + + mf = mmap.mmap(f.fileno(), 10) + mf.move(5, 0, 5) + verify(mf[:] == "ABCDEABCDE", "Map move should have duplicated front 5") + mf.close() + f.close() + + finally: + os.unlink(TESTFN) + +def test_anon(): + print " anonymous mmap.mmap(-1, PAGESIZE)..." + m = mmap.mmap(-1, PAGESIZE) + for x in xrange(PAGESIZE): + verify(m[x] == '\0', "anonymously mmap'ed contents should be zero") + + for x in xrange(PAGESIZE): + m[x] = ch = chr(x & 255) + vereq(m[x], ch) + +test_both() +test_anon() +print ' Test passed'