--- /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'