[Python-checkins] r52537 - in python/trunk/Lib/test: output/test_mmap test_mmap.py
georg.brandl
python-checkins at python.org
Sun Oct 29 20:13:41 CET 2006
Author: georg.brandl
Date: Sun Oct 29 20:13:40 2006
New Revision: 52537
Removed:
python/trunk/Lib/test/output/test_mmap
Modified:
python/trunk/Lib/test/test_mmap.py
Log:
Convert test_mmap to unittest.
Deleted: /python/trunk/Lib/test/output/test_mmap
==============================================================================
--- /python/trunk/Lib/test/output/test_mmap Sun Oct 29 20:13:40 2006
+++ (empty file)
@@ -1,38 +0,0 @@
-test_mmap
-<type 'mmap.mmap'>
- Position of foo: 1.0 pages
- Length of file: 2.0 pages
- Contents of byte 0: '\x00'
- Contents of first 3 bytes: '\x00\x00\x00'
-
- Modifying file's content...
- Contents of byte 0: '3'
- Contents of first 3 bytes: '3\x00\x00'
- Contents of second page: '\x00foobar\x00'
- Regex match on mmap (page start, length of match): 1.0 6
- Seek to zeroth byte
- Seek to 42nd byte
- Seek to last byte
- Try to seek to negative position...
- Try to seek beyond end of mmap...
- Try to seek to negative position...
- Attempting resize()
- Creating 10 byte test data file.
- Opening mmap with access=ACCESS_READ
- Ensuring that readonly mmap can't be slice assigned.
- Ensuring that readonly mmap can't be item assigned.
- Ensuring that readonly mmap can't be write() to.
- Ensuring that readonly mmap can't be write_byte() to.
- Ensuring that readonly mmap can't be resized.
- Opening mmap with size too big
- Opening mmap with access=ACCESS_WRITE
- Modifying write-through memory map.
- Opening mmap with access=ACCESS_COPY
- Modifying copy-on-write memory map.
- Ensuring copy-on-write maps cannot be resized.
- Ensuring invalid access parameter raises exception.
- Try opening a bad file descriptor...
- Ensuring that passing 0 as map length sets map size to current file size.
- Ensuring that passing 0 as map length sets map size to current file size.
- anonymous mmap.mmap(-1, PAGESIZE)...
- Test passed
Modified: python/trunk/Lib/test/test_mmap.py
==============================================================================
--- python/trunk/Lib/test/test_mmap.py (original)
+++ python/trunk/Lib/test/test_mmap.py Sun Oct 29 20:13:40 2006
@@ -1,190 +1,158 @@
-from test.test_support import verify, vereq, TESTFN
+from test.test_support import TESTFN, run_unittest
import mmap
+import unittest
import os, re
PAGESIZE = mmap.PAGESIZE
-def test_both():
- "Test mmap module on Unix systems and Windows"
+class MmapTests(unittest.TestCase):
- # 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()
+ def setUp(self):
+ if os.path.exists(TESTFN):
+ os.unlink(TESTFN)
- # Simple sanity checks
+ def tearDown(self):
+ try:
+ os.unlink(TESTFN)
+ except OSError:
+ pass
- 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')
+ def test_basic(self):
+ # Test mmap module on Unix systems and Windows
- m.flush()
+ # Create a file to be mmap'ed.
+ f = open(TESTFN, 'w+')
+ try:
+ # 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()
- # 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
+ # Simple sanity checks
- print ' Regex match on mmap (page start, length of match):',
- print start / float(PAGESIZE), length
+ tp = str(type(m)) # SF bug 128713: segfaulted on Linux
+ self.assertEqual(m.find('foo'), PAGESIZE)
- vereq(start, PAGESIZE)
- vereq(end, PAGESIZE + 6)
+ self.assertEqual(len(m), 2*PAGESIZE)
- # 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))
+ self.assertEqual(m[0], '\0')
+ self.assertEqual(m[0:3], '\0\0\0')
- 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')
+ # Modify the file's content
+ m[0] = '3'
+ m[PAGESIZE +3: PAGESIZE +3+3] = 'bar'
- 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')
+ # Check that the modification worked
+ self.assertEqual(m[0], '3')
+ self.assertEqual(m[0:3], '3\0\0')
+ self.assertEqual(m[PAGESIZE-1 : PAGESIZE + 7], '\0foobar\0')
- 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')
+ m.flush()
- # 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.
+ # Test doing a regular expression match in an mmap'ed file
+ match = re.search('[A-Za-z]+', m)
+ if match is None:
+ self.fail('regex match on mmap failed!')
+ else:
+ start, end = match.span(0)
+ length = end - start
+
+ self.assertEqual(start, PAGESIZE)
+ self.assertEqual(end, PAGESIZE + 6)
+
+ # test seeking around (try to overflow the seek implementation)
+ m.seek(0,0)
+ self.assertEqual(m.tell(), 0)
+ m.seek(42,1)
+ self.assertEqual(m.tell(), 42)
+ m.seek(0,2)
+ self.assertEqual(m.tell(), len(m))
+
+ # Try to seek to negative position...
+ self.assertRaises(ValueError, m.seek, -1)
+
+ # Try to seek beyond end of mmap...
+ self.assertRaises(ValueError, m.seek, 1, 2)
+
+ # Try to seek to negative position...
+ self.assertRaises(ValueError, m.seek, -len(m)-1, 2)
+
+ # Try resizing map
try:
- m.seek(513,0)
- except ValueError:
+ 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:
- verify(0, 'Could seek beyond the new size')
+ # resize() is supported
+ self.assertEqual(len(m), 512)
+ # Check that we can no longer seek beyond the new size.
+ self.assertRaises(ValueError, m.seek, 513, 0)
+
+ # Check that the underlying file is truncated too
+ # (bug #728515)
+ f = open(TESTFN)
+ f.seek(0, 2)
+ self.assertEqual(f.tell(), 512)
+ f.close()
+ self.assertEqual(m.size(), 512)
- # 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()
+ m.close()
- finally:
- try:
- f.close()
- except OSError:
- pass
- try:
- os.unlink(TESTFN)
- except OSError:
- pass
+ finally:
+ try:
+ f.close()
+ except OSError:
+ pass
- # Test for "access" keyword parameter
- try:
+ def test_access_parameter(self):
+ # Test for "access" keyword parameter
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.")
+ self.assertEqual(m[:], 'a'*mapsize, "Readonly memory map data incorrect.")
- print " Ensuring that readonly mmap can't be slice assigned."
+ # 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")
+ self.fail("Able to write to readonly memory map")
- print " Ensuring that readonly mmap can't be item assigned."
+ # 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")
+ self.fail("Able to write to readonly memory map")
- print " Ensuring that readonly mmap can't be write() to."
+ # 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")
+ self.fail("Able to write to readonly memory map")
- print " Ensuring that readonly mmap can't be write_byte() to."
+ # 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")
+ self.fail("Able to write to readonly memory map")
- print " Ensuring that readonly mmap can't be resized."
+ # Ensuring that readonly mmap can't be resized
try:
m.resize(2*mapsize)
except SystemError: # resize is not universally supported
@@ -192,12 +160,12 @@
except TypeError:
pass
else:
- verify(0, "Able to resize readonly memory map")
+ self.fail("Able to resize readonly memory map")
del m, f
- verify(open(TESTFN, "rb").read() == 'a'*mapsize,
+ self.assertEqual(open(TESTFN, "rb").read(), 'a'*mapsize,
"Readonly memory map data file was modified")
- print " Opening mmap with size too big"
+ # Opening mmap with size too big
import sys
f = open(TESTFN, "r+b")
try:
@@ -208,11 +176,11 @@
# 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.")
+ self.fail("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.")
+ self.fail("Opening mmap with size+1 should raise ValueError.")
m.close()
f.close()
if sys.platform.startswith('win'):
@@ -221,12 +189,12 @@
f.truncate(mapsize)
f.close()
- print " Opening mmap with access=ACCESS_WRITE"
+ # 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."
+ # Modifying write-through memory map
m[:] = 'c'*mapsize
- verify(m[:] == 'c'*mapsize,
+ self.assertEqual(m[:], 'c'*mapsize,
"Write-through memory map memory not updated properly.")
m.flush()
m.close()
@@ -234,66 +202,45 @@
f = open(TESTFN, 'rb')
stuff = f.read()
f.close()
- verify(stuff == 'c'*mapsize,
+ self.assertEqual(stuff, 'c'*mapsize,
"Write-through memory map data file not updated properly.")
- print " Opening mmap with access=ACCESS_COPY"
+ # 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."
+ # Modifying copy-on-write memory map
m[:] = 'd'*mapsize
- verify(m[:] == 'd' * mapsize,
+ self.assertEqual(m[:], 'd' * mapsize,
"Copy-on-write memory map data not written correctly.")
m.flush()
- verify(open(TESTFN, "rb").read() == 'c'*mapsize,
+ self.assertEqual(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.")
+ # Ensuring copy-on-write maps cannot be resized
+ self.assertRaises(TypeError, m.resize, 2*mapsize)
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.")
+
+ # Ensuring invalid access parameter raises exception
+ f = open(TESTFN, "r+b")
+ self.assertRaises(ValueError, mmap.mmap, f.fileno(), mapsize, access=4)
+ f.close()
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,
+ self.assertRaises(ValueError, 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+')
+ def test_bad_file_desc(self):
+ # Try opening a bad file descriptor...
+ self.assertRaises(mmap.error, mmap.mmap, -2, 4096)
+
+ def test_tougher_find(self):
+ # 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)
@@ -304,17 +251,14 @@
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)
+ self.assertEqual(m.find(slice), data.find(slice))
+ self.assertEqual(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+')
+ def test_double_close(self):
+ # 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()
@@ -324,72 +268,46 @@
mf.close()
f.close()
- finally:
- os.unlink(TESTFN)
+ def test_entire_file(self):
+ # test mapping of entire file by passing 0 for map length
+ if hasattr(os, "stat"):
+ f = open(TESTFN, "w+")
- # 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")
+ self.assertEqual(len(mf), 2**16, "Map size should equal file size.")
+ self.assertEqual(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()
+ def test_move(self):
+ # make move works everywhere (64-bit format problem earlier)
+ f = open(TESTFN, 'w+')
- 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")
+ self.assertEqual(mf[:], "ABCDEABCDE", "Map move should have duplicated front 5")
mf.close()
f.close()
- finally:
- os.unlink(TESTFN)
+ def test_anonymous(self):
+ # anonymous mmap.mmap(-1, PAGE)
+ m = mmap.mmap(-1, PAGESIZE)
+ for x in xrange(PAGESIZE):
+ self.assertEqual(m[x], '\0', "anonymously mmap'ed contents should be zero")
+
+ for x in xrange(PAGESIZE):
+ m[x] = ch = chr(x & 255)
+ self.assertEqual(m[x], ch)
+
+def test_main():
+ run_unittest(MmapTests)
-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'
+if __name__ == '__main__':
+ test_main()
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