The usual...
diff --git a/Lib/dos-8x3/test_mma.py b/Lib/dos-8x3/test_mma.py
new file mode 100644
index 0000000..e5da187
--- /dev/null
+++ b/Lib/dos-8x3/test_mma.py
@@ -0,0 +1,67 @@
+
+import mmap
+import string, os, re, sys
+
+PAGESIZE = mmap.PAGESIZE
+
+def test_both():
+ "Test mmap module on Unix systems and Windows"
+
+ # Create an mmap'ed file
+ f = open('foo', 'w+')
+
+ # Write 2 pages worth of data to the file
+ f.write('\0'* PAGESIZE)
+ f.write('foo')
+ f.write('\0'* (PAGESIZE-3) )
+
+ m = mmap.mmap(f.fileno(), 2 * PAGESIZE)
+ f.close()
+
+ # Simple sanity checks
+ print ' Position of foo:', string.find(m, 'foo') / float(PAGESIZE), 'pages'
+ assert string.find(m, 'foo') == PAGESIZE
+
+ print ' Length of file:', len(m) / float(PAGESIZE), 'pages'
+ assert len(m) == 2*PAGESIZE
+
+ print ' Contents of byte 0:', repr(m[0])
+ assert m[0] == '\0'
+ print ' Contents of first 3 bytes:', repr(m[0:3])
+ assert 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])
+ assert m[0] == '3'
+ print ' Contents of first 3 bytes:', repr(m[0:3])
+ assert m[0:3] == '3\0\0'
+ print ' Contents of second page:', m[PAGESIZE-1 : PAGESIZE + 7]
+ assert 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 == 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
+
+ assert start == PAGESIZE
+ assert end == PAGESIZE + 6
+
+ m.close()
+ os.unlink("foo")
+ print ' Test passed'
+
+test_both()
+