655 lines
22 KiB
Python
655 lines
22 KiB
Python
from test.support import TESTFN, run_unittest, import_module
|
|
import unittest
|
|
import os
|
|
import re
|
|
import itertools
|
|
import socket
|
|
import sys
|
|
|
|
# Skip test if we can't import mmap.
|
|
mmap = import_module('mmap')
|
|
|
|
PAGESIZE = mmap.PAGESIZE
|
|
|
|
class MmapTests(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
if os.path.exists(TESTFN):
|
|
os.unlink(TESTFN)
|
|
|
|
def tearDown(self):
|
|
try:
|
|
os.unlink(TESTFN)
|
|
except OSError:
|
|
pass
|
|
|
|
def test_basic(self):
|
|
# Test mmap module on Unix systems and Windows
|
|
|
|
# Create a file to be mmap'ed.
|
|
f = open(TESTFN, 'bw+')
|
|
try:
|
|
# Write 2 pages worth of data to the file
|
|
f.write(b'\0'* PAGESIZE)
|
|
f.write(b'foo')
|
|
f.write(b'\0'* (PAGESIZE-3) )
|
|
f.flush()
|
|
m = mmap.mmap(f.fileno(), 2 * PAGESIZE)
|
|
finally:
|
|
f.close()
|
|
|
|
# Simple sanity checks
|
|
|
|
tp = str(type(m)) # SF bug 128713: segfaulted on Linux
|
|
self.assertEqual(m.find(b'foo'), PAGESIZE)
|
|
|
|
self.assertEqual(len(m), 2*PAGESIZE)
|
|
|
|
self.assertEqual(m[0], 0)
|
|
self.assertEqual(m[0:3], b'\0\0\0')
|
|
|
|
# Shouldn't crash on boundary (Issue #5292)
|
|
self.assertRaises(IndexError, m.__getitem__, len(m))
|
|
self.assertRaises(IndexError, m.__setitem__, len(m), b'\0')
|
|
|
|
# Modify the file's content
|
|
m[0] = b'3'[0]
|
|
m[PAGESIZE +3: PAGESIZE +3+3] = b'bar'
|
|
|
|
# Check that the modification worked
|
|
self.assertEqual(m[0], b'3'[0])
|
|
self.assertEqual(m[0:3], b'3\0\0')
|
|
self.assertEqual(m[PAGESIZE-1 : PAGESIZE + 7], b'\0foobar\0')
|
|
|
|
m.flush()
|
|
|
|
# Test doing a regular expression match in an mmap'ed file
|
|
match = re.search(b'[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.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
|
|
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)
|
|
try:
|
|
f.seek(0, 2)
|
|
self.assertEqual(f.tell(), 512)
|
|
finally:
|
|
f.close()
|
|
self.assertEqual(m.size(), 512)
|
|
|
|
m.close()
|
|
|
|
def test_access_parameter(self):
|
|
# Test for "access" keyword parameter
|
|
mapsize = 10
|
|
with open(TESTFN, "wb") as fp:
|
|
fp.write(b"a"*mapsize)
|
|
with open(TESTFN, "rb") as f:
|
|
m = mmap.mmap(f.fileno(), mapsize, access=mmap.ACCESS_READ)
|
|
self.assertEqual(m[:], b'a'*mapsize, "Readonly memory map data incorrect.")
|
|
|
|
# Ensuring that readonly mmap can't be slice assigned
|
|
try:
|
|
m[:] = b'b'*mapsize
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("Able to write to readonly memory map")
|
|
|
|
# Ensuring that readonly mmap can't be item assigned
|
|
try:
|
|
m[0] = b'b'
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("Able to write to readonly memory map")
|
|
|
|
# Ensuring that readonly mmap can't be write() to
|
|
try:
|
|
m.seek(0,0)
|
|
m.write(b'abc')
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("Able to write to readonly memory map")
|
|
|
|
# Ensuring that readonly mmap can't be write_byte() to
|
|
try:
|
|
m.seek(0,0)
|
|
m.write_byte(b'd')
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("Able to write to readonly memory map")
|
|
|
|
# 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:
|
|
self.fail("Able to resize readonly memory map")
|
|
with open(TESTFN, "rb") as fp:
|
|
self.assertEqual(fp.read(), b'a'*mapsize,
|
|
"Readonly memory map data file was modified")
|
|
|
|
# Opening mmap with size too big
|
|
with open(TESTFN, "r+b") as f:
|
|
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'):
|
|
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'):
|
|
self.fail("Opening mmap with size+1 should raise ValueError.")
|
|
m.close()
|
|
if sys.platform.startswith('win'):
|
|
# Repair damage from the resizing test.
|
|
with open(TESTFN, 'r+b') as f:
|
|
f.truncate(mapsize)
|
|
|
|
# Opening mmap with access=ACCESS_WRITE
|
|
with open(TESTFN, "r+b") as f:
|
|
m = mmap.mmap(f.fileno(), mapsize, access=mmap.ACCESS_WRITE)
|
|
# Modifying write-through memory map
|
|
m[:] = b'c'*mapsize
|
|
self.assertEqual(m[:], b'c'*mapsize,
|
|
"Write-through memory map memory not updated properly.")
|
|
m.flush()
|
|
m.close()
|
|
with open(TESTFN, 'rb') as f:
|
|
stuff = f.read()
|
|
self.assertEqual(stuff, b'c'*mapsize,
|
|
"Write-through memory map data file not updated properly.")
|
|
|
|
# Opening mmap with access=ACCESS_COPY
|
|
with open(TESTFN, "r+b") as f:
|
|
m = mmap.mmap(f.fileno(), mapsize, access=mmap.ACCESS_COPY)
|
|
# Modifying copy-on-write memory map
|
|
m[:] = b'd'*mapsize
|
|
self.assertEqual(m[:], b'd' * mapsize,
|
|
"Copy-on-write memory map data not written correctly.")
|
|
m.flush()
|
|
with open(TESTFN, "rb") as fp:
|
|
self.assertEqual(fp.read(), b'c'*mapsize,
|
|
"Copy-on-write test data file should not be modified.")
|
|
# Ensuring copy-on-write maps cannot be resized
|
|
self.assertRaises(TypeError, m.resize, 2*mapsize)
|
|
m.close()
|
|
|
|
# Ensuring invalid access parameter raises exception
|
|
with open(TESTFN, "r+b") as f:
|
|
self.assertRaises(ValueError, mmap.mmap, f.fileno(), mapsize, access=4)
|
|
|
|
if os.name == "posix":
|
|
# Try incompatible flags, prot and access parameters.
|
|
with open(TESTFN, "r+b") as f:
|
|
self.assertRaises(ValueError, mmap.mmap, f.fileno(), mapsize,
|
|
flags=mmap.MAP_PRIVATE,
|
|
prot=mmap.PROT_READ, access=mmap.ACCESS_WRITE)
|
|
|
|
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.
|
|
with open(TESTFN, 'wb+') as f:
|
|
|
|
data = b'aabaac\x00deef\x00\x00aa\x00'
|
|
n = len(data)
|
|
f.write(data)
|
|
f.flush()
|
|
m = mmap.mmap(f.fileno(), n)
|
|
|
|
for start in range(n+1):
|
|
for finish in range(start, n+1):
|
|
slice = data[start : finish]
|
|
self.assertEqual(m.find(slice), data.find(slice))
|
|
self.assertEqual(m.find(slice + b'x'), -1)
|
|
m.close()
|
|
|
|
def test_find_end(self):
|
|
# test the new 'end' parameter works as expected
|
|
f = open(TESTFN, 'wb+')
|
|
data = b'one two ones'
|
|
n = len(data)
|
|
f.write(data)
|
|
f.flush()
|
|
m = mmap.mmap(f.fileno(), n)
|
|
f.close()
|
|
|
|
self.assertEqual(m.find(b'one'), 0)
|
|
self.assertEqual(m.find(b'ones'), 8)
|
|
self.assertEqual(m.find(b'one', 0, -1), 0)
|
|
self.assertEqual(m.find(b'one', 1), 8)
|
|
self.assertEqual(m.find(b'one', 1, -1), 8)
|
|
self.assertEqual(m.find(b'one', 1, -2), -1)
|
|
|
|
|
|
def test_rfind(self):
|
|
# test the new 'end' parameter works as expected
|
|
f = open(TESTFN, 'wb+')
|
|
data = b'one two ones'
|
|
n = len(data)
|
|
f.write(data)
|
|
f.flush()
|
|
m = mmap.mmap(f.fileno(), n)
|
|
f.close()
|
|
|
|
self.assertEqual(m.rfind(b'one'), 8)
|
|
self.assertEqual(m.rfind(b'one '), 0)
|
|
self.assertEqual(m.rfind(b'one', 0, -1), 8)
|
|
self.assertEqual(m.rfind(b'one', 0, -2), 0)
|
|
self.assertEqual(m.rfind(b'one', 1, -1), 8)
|
|
self.assertEqual(m.rfind(b'one', 1, -2), -1)
|
|
|
|
|
|
def test_double_close(self):
|
|
# make sure a double close doesn't crash on Solaris (Bug# 665913)
|
|
f = open(TESTFN, 'wb+')
|
|
|
|
f.write(2**16 * b'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()
|
|
|
|
def test_entire_file(self):
|
|
# test mapping of entire file by passing 0 for map length
|
|
if hasattr(os, "stat"):
|
|
f = open(TESTFN, "wb+")
|
|
|
|
f.write(2**16 * b'm') # Arbitrary character
|
|
f.close()
|
|
|
|
f = open(TESTFN, "rb+")
|
|
mf = mmap.mmap(f.fileno(), 0)
|
|
self.assertEqual(len(mf), 2**16, "Map size should equal file size.")
|
|
self.assertEqual(mf.read(2**16), 2**16 * b"m")
|
|
mf.close()
|
|
f.close()
|
|
|
|
def test_length_0_offset(self):
|
|
# Issue #10916: test mapping of remainder of file by passing 0 for
|
|
# map length with an offset doesn't cause a segfault.
|
|
if not hasattr(os, "stat"):
|
|
self.skipTest("needs os.stat")
|
|
# NOTE: allocation granularity is currently 65536 under Win64,
|
|
# and therefore the minimum offset alignment.
|
|
with open(TESTFN, "wb") as f:
|
|
f.write((65536 * 2) * b'm') # Arbitrary character
|
|
|
|
with open(TESTFN, "rb") as f:
|
|
with mmap.mmap(f.fileno(), 0, offset=65536, access=mmap.ACCESS_READ) as mf:
|
|
self.assertRaises(IndexError, mf.__getitem__, 80000)
|
|
|
|
def test_length_0_large_offset(self):
|
|
# Issue #10959: test mapping of a file by passing 0 for
|
|
# map length with a large offset doesn't cause a segfault.
|
|
if not hasattr(os, "stat"):
|
|
self.skipTest("needs os.stat")
|
|
|
|
with open(TESTFN, "wb") as f:
|
|
f.write(115699 * b'm') # Arbitrary character
|
|
|
|
with open(TESTFN, "w+b") as f:
|
|
self.assertRaises(ValueError, mmap.mmap, f.fileno(), 0,
|
|
offset=2147418112)
|
|
|
|
def test_move(self):
|
|
# make move works everywhere (64-bit format problem earlier)
|
|
f = open(TESTFN, 'wb+')
|
|
|
|
f.write(b"ABCDEabcde") # Arbitrary character
|
|
f.flush()
|
|
|
|
mf = mmap.mmap(f.fileno(), 10)
|
|
mf.move(5, 0, 5)
|
|
self.assertEqual(mf[:], b"ABCDEABCDE", "Map move should have duplicated front 5")
|
|
mf.close()
|
|
f.close()
|
|
|
|
# more excessive test
|
|
data = b"0123456789"
|
|
for dest in range(len(data)):
|
|
for src in range(len(data)):
|
|
for count in range(len(data) - max(dest, src)):
|
|
expected = data[:dest] + data[src:src+count] + data[dest+count:]
|
|
m = mmap.mmap(-1, len(data))
|
|
m[:] = data
|
|
m.move(dest, src, count)
|
|
self.assertEqual(m[:], expected)
|
|
m.close()
|
|
|
|
# segfault test (Issue 5387)
|
|
m = mmap.mmap(-1, 100)
|
|
offsets = [-100, -1, 0, 1, 100]
|
|
for source, dest, size in itertools.product(offsets, offsets, offsets):
|
|
try:
|
|
m.move(source, dest, size)
|
|
except ValueError:
|
|
pass
|
|
|
|
offsets = [(-1, -1, -1), (-1, -1, 0), (-1, 0, -1), (0, -1, -1),
|
|
(-1, 0, 0), (0, -1, 0), (0, 0, -1)]
|
|
for source, dest, size in offsets:
|
|
self.assertRaises(ValueError, m.move, source, dest, size)
|
|
|
|
m.close()
|
|
|
|
m = mmap.mmap(-1, 1) # single byte
|
|
self.assertRaises(ValueError, m.move, 0, 0, 2)
|
|
self.assertRaises(ValueError, m.move, 1, 0, 1)
|
|
self.assertRaises(ValueError, m.move, 0, 1, 1)
|
|
m.move(0, 0, 1)
|
|
m.move(0, 0, 0)
|
|
|
|
|
|
def test_anonymous(self):
|
|
# anonymous mmap.mmap(-1, PAGE)
|
|
m = mmap.mmap(-1, PAGESIZE)
|
|
for x in range(PAGESIZE):
|
|
self.assertEqual(m[x], 0,
|
|
"anonymously mmap'ed contents should be zero")
|
|
|
|
for x in range(PAGESIZE):
|
|
b = x & 0xff
|
|
m[x] = b
|
|
self.assertEqual(m[x], b)
|
|
|
|
def test_extended_getslice(self):
|
|
# Test extended slicing by comparing with list slicing.
|
|
s = bytes(reversed(range(256)))
|
|
m = mmap.mmap(-1, len(s))
|
|
m[:] = s
|
|
self.assertEqual(m[:], s)
|
|
indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)
|
|
for start in indices:
|
|
for stop in indices:
|
|
# Skip step 0 (invalid)
|
|
for step in indices[1:]:
|
|
self.assertEqual(m[start:stop:step],
|
|
s[start:stop:step])
|
|
|
|
def test_extended_set_del_slice(self):
|
|
# Test extended slicing by comparing with list slicing.
|
|
s = bytes(reversed(range(256)))
|
|
m = mmap.mmap(-1, len(s))
|
|
indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)
|
|
for start in indices:
|
|
for stop in indices:
|
|
# Skip invalid step 0
|
|
for step in indices[1:]:
|
|
m[:] = s
|
|
self.assertEqual(m[:], s)
|
|
L = list(s)
|
|
# Make sure we have a slice of exactly the right length,
|
|
# but with different data.
|
|
data = L[start:stop:step]
|
|
data = bytes(reversed(data))
|
|
L[start:stop:step] = data
|
|
m[start:stop:step] = data
|
|
self.assertEqual(m[:], bytes(L))
|
|
|
|
def make_mmap_file (self, f, halfsize):
|
|
# Write 2 pages worth of data to the file
|
|
f.write (b'\0' * halfsize)
|
|
f.write (b'foo')
|
|
f.write (b'\0' * (halfsize - 3))
|
|
f.flush ()
|
|
return mmap.mmap (f.fileno(), 0)
|
|
|
|
def test_offset (self):
|
|
f = open (TESTFN, 'w+b')
|
|
|
|
try: # unlink TESTFN no matter what
|
|
halfsize = mmap.ALLOCATIONGRANULARITY
|
|
m = self.make_mmap_file (f, halfsize)
|
|
m.close ()
|
|
f.close ()
|
|
|
|
mapsize = halfsize * 2
|
|
# Try invalid offset
|
|
f = open(TESTFN, "r+b")
|
|
for offset in [-2, -1, None]:
|
|
try:
|
|
m = mmap.mmap(f.fileno(), mapsize, offset=offset)
|
|
self.assertEqual(0, 1)
|
|
except (ValueError, TypeError, OverflowError):
|
|
pass
|
|
else:
|
|
self.assertEqual(0, 0)
|
|
f.close()
|
|
|
|
# Try valid offset, hopefully 8192 works on all OSes
|
|
f = open(TESTFN, "r+b")
|
|
m = mmap.mmap(f.fileno(), mapsize - halfsize, offset=halfsize)
|
|
self.assertEqual(m[0:3], b'foo')
|
|
f.close()
|
|
|
|
# Try resizing map
|
|
try:
|
|
m.resize(512)
|
|
except SystemError:
|
|
pass
|
|
else:
|
|
# 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 content is not changed
|
|
self.assertEqual(m[0:3], b'foo')
|
|
|
|
# Check that the underlying file is truncated too
|
|
f = open(TESTFN)
|
|
f.seek(0, 2)
|
|
self.assertEqual(f.tell(), halfsize + 512)
|
|
f.close()
|
|
self.assertEqual(m.size(), halfsize + 512)
|
|
|
|
m.close()
|
|
|
|
finally:
|
|
f.close()
|
|
try:
|
|
os.unlink(TESTFN)
|
|
except OSError:
|
|
pass
|
|
|
|
def test_subclass(self):
|
|
class anon_mmap(mmap.mmap):
|
|
def __new__(klass, *args, **kwargs):
|
|
return mmap.mmap.__new__(klass, -1, *args, **kwargs)
|
|
anon_mmap(PAGESIZE)
|
|
|
|
def test_prot_readonly(self):
|
|
if not hasattr(mmap, 'PROT_READ'):
|
|
return
|
|
mapsize = 10
|
|
with open(TESTFN, "wb") as fp:
|
|
fp.write(b"a"*mapsize)
|
|
f = open(TESTFN, "rb")
|
|
m = mmap.mmap(f.fileno(), mapsize, prot=mmap.PROT_READ)
|
|
self.assertRaises(TypeError, m.write, "foo")
|
|
f.close()
|
|
|
|
def test_error(self):
|
|
self.assertTrue(issubclass(mmap.error, EnvironmentError))
|
|
self.assertIn("mmap.error", str(mmap.error))
|
|
|
|
def test_io_methods(self):
|
|
data = b"0123456789"
|
|
with open(TESTFN, "wb") as fp:
|
|
fp.write(b"x"*len(data))
|
|
f = open(TESTFN, "r+b")
|
|
m = mmap.mmap(f.fileno(), len(data))
|
|
f.close()
|
|
# Test write_byte()
|
|
for i in range(len(data)):
|
|
self.assertEqual(m.tell(), i)
|
|
m.write_byte(data[i])
|
|
self.assertEqual(m.tell(), i+1)
|
|
self.assertRaises(ValueError, m.write_byte, b"x"[0])
|
|
self.assertEqual(m[:], data)
|
|
# Test read_byte()
|
|
m.seek(0)
|
|
for i in range(len(data)):
|
|
self.assertEqual(m.tell(), i)
|
|
self.assertEqual(m.read_byte(), data[i])
|
|
self.assertEqual(m.tell(), i+1)
|
|
self.assertRaises(ValueError, m.read_byte)
|
|
# Test read()
|
|
m.seek(3)
|
|
self.assertEqual(m.read(3), b"345")
|
|
self.assertEqual(m.tell(), 6)
|
|
# Test write()
|
|
m.seek(3)
|
|
m.write(b"bar")
|
|
self.assertEqual(m.tell(), 6)
|
|
self.assertEqual(m[:], b"012bar6789")
|
|
m.seek(8)
|
|
self.assertRaises(ValueError, m.write, b"bar")
|
|
|
|
def test_non_ascii_byte(self):
|
|
for b in (129, 200, 255): # > 128
|
|
m = mmap.mmap(-1, 1)
|
|
m.write_byte(b)
|
|
self.assertEqual(m[0], b)
|
|
m.seek(0)
|
|
self.assertEqual(m.read_byte(), b)
|
|
m.close()
|
|
|
|
if os.name == 'nt':
|
|
def test_tagname(self):
|
|
data1 = b"0123456789"
|
|
data2 = b"abcdefghij"
|
|
assert len(data1) == len(data2)
|
|
|
|
# Test same tag
|
|
m1 = mmap.mmap(-1, len(data1), tagname="foo")
|
|
m1[:] = data1
|
|
m2 = mmap.mmap(-1, len(data2), tagname="foo")
|
|
m2[:] = data2
|
|
self.assertEqual(m1[:], data2)
|
|
self.assertEqual(m2[:], data2)
|
|
m2.close()
|
|
m1.close()
|
|
|
|
# Test differnt tag
|
|
m1 = mmap.mmap(-1, len(data1), tagname="foo")
|
|
m1[:] = data1
|
|
m2 = mmap.mmap(-1, len(data2), tagname="boo")
|
|
m2[:] = data2
|
|
self.assertEqual(m1[:], data1)
|
|
self.assertEqual(m2[:], data2)
|
|
m2.close()
|
|
m1.close()
|
|
|
|
def test_crasher_on_windows(self):
|
|
# Should not crash (Issue 1733986)
|
|
m = mmap.mmap(-1, 1000, tagname="foo")
|
|
try:
|
|
mmap.mmap(-1, 5000, tagname="foo")[:] # same tagname, but larger size
|
|
except:
|
|
pass
|
|
m.close()
|
|
|
|
# Should not crash (Issue 5385)
|
|
with open(TESTFN, "wb") as fp:
|
|
fp.write(b"x"*10)
|
|
f = open(TESTFN, "r+b")
|
|
m = mmap.mmap(f.fileno(), 0)
|
|
f.close()
|
|
try:
|
|
m.resize(0) # will raise WindowsError
|
|
except:
|
|
pass
|
|
try:
|
|
m[:]
|
|
except:
|
|
pass
|
|
m.close()
|
|
|
|
def test_invalid_descriptor(self):
|
|
# socket file descriptors are valid, but out of range
|
|
# for _get_osfhandle, causing a crash when validating the
|
|
# parameters to _get_osfhandle.
|
|
s = socket.socket()
|
|
try:
|
|
with self.assertRaises(mmap.error):
|
|
m = mmap.mmap(s.fileno(), 10)
|
|
finally:
|
|
s.close()
|
|
|
|
def test_context_manager(self):
|
|
with mmap.mmap(-1, 10) as m:
|
|
self.assertFalse(m.closed)
|
|
self.assertTrue(m.closed)
|
|
|
|
def test_context_manager_exception(self):
|
|
# Test that the IOError gets passed through
|
|
with self.assertRaises(Exception) as exc:
|
|
with mmap.mmap(-1, 10) as m:
|
|
raise IOError
|
|
self.assertIsInstance(exc.exception, IOError,
|
|
"wrong exception raised in context manager")
|
|
self.assertTrue(m.closed, "context manager failed")
|
|
|
|
|
|
def test_main():
|
|
run_unittest(MmapTests)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|