mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
cffcfed126
test_file to fail on Windows in reality (can't delete a still-open file), but a new bare "except:" hid that test_file failed on Windows, and leaving behind the still-open TESTFN caused a cascade of bogus failures in later tests. So, close the file, and stop hiding failure to unlink.
339 lines
9.4 KiB
Python
339 lines
9.4 KiB
Python
import sys
|
|
import os
|
|
from array import array
|
|
from weakref import proxy
|
|
|
|
from test.test_support import verify, TESTFN, TestFailed, findfile
|
|
from UserList import UserList
|
|
|
|
# verify weak references
|
|
f = file(TESTFN, 'w')
|
|
p = proxy(f)
|
|
p.write('teststring')
|
|
verify(f.tell(), p.tell())
|
|
f.close()
|
|
f = None
|
|
try:
|
|
p.tell()
|
|
except ReferenceError:
|
|
pass
|
|
else:
|
|
raise TestFailed('file proxy still exists when the file is gone')
|
|
|
|
# verify expected attributes exist
|
|
f = file(TESTFN, 'w')
|
|
softspace = f.softspace
|
|
f.name # merely shouldn't blow up
|
|
f.mode # ditto
|
|
f.closed # ditto
|
|
|
|
# verify softspace is writable
|
|
f.softspace = softspace # merely shouldn't blow up
|
|
|
|
# verify the others aren't
|
|
for attr in 'name', 'mode', 'closed':
|
|
try:
|
|
setattr(f, attr, 'oops')
|
|
except (AttributeError, TypeError):
|
|
pass
|
|
else:
|
|
raise TestFailed('expected exception setting file attr %r' % attr)
|
|
f.close()
|
|
|
|
# check invalid mode strings
|
|
for mode in ("", "aU", "wU+"):
|
|
try:
|
|
f = file(TESTFN, mode)
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
f.close()
|
|
raise TestFailed('%r is an invalid file mode' % mode)
|
|
|
|
# verify writelines with instance sequence
|
|
l = UserList(['1', '2'])
|
|
f = open(TESTFN, 'wb')
|
|
f.writelines(l)
|
|
f.close()
|
|
f = open(TESTFN, 'rb')
|
|
buf = f.read()
|
|
f.close()
|
|
verify(buf == '12')
|
|
|
|
# verify readinto
|
|
a = array('c', 'x'*10)
|
|
f = open(TESTFN, 'rb')
|
|
n = f.readinto(a)
|
|
f.close()
|
|
verify(buf == a.tostring()[:n])
|
|
|
|
# verify writelines with integers
|
|
f = open(TESTFN, 'wb')
|
|
try:
|
|
f.writelines([1, 2, 3])
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
print "writelines accepted sequence of integers"
|
|
f.close()
|
|
|
|
# verify writelines with integers in UserList
|
|
f = open(TESTFN, 'wb')
|
|
l = UserList([1,2,3])
|
|
try:
|
|
f.writelines(l)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
print "writelines accepted sequence of integers"
|
|
f.close()
|
|
|
|
# verify writelines with non-string object
|
|
class NonString: pass
|
|
|
|
f = open(TESTFN, 'wb')
|
|
try:
|
|
f.writelines([NonString(), NonString()])
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
print "writelines accepted sequence of non-string objects"
|
|
f.close()
|
|
|
|
try:
|
|
sys.stdin.seek(-1)
|
|
except IOError:
|
|
pass
|
|
else:
|
|
print "should not be able to seek on sys.stdin"
|
|
|
|
try:
|
|
sys.stdin.truncate()
|
|
except IOError:
|
|
pass
|
|
else:
|
|
print "should not be able to truncate on sys.stdin"
|
|
|
|
# verify repr works
|
|
f = open(TESTFN)
|
|
if not repr(f).startswith("<open file '" + TESTFN):
|
|
print "repr(file) failed"
|
|
f.close()
|
|
|
|
# verify repr works for unicode too
|
|
f = open(unicode(TESTFN))
|
|
if not repr(f).startswith("<open file u'" + TESTFN):
|
|
print "repr(file with unicode name) failed"
|
|
f.close()
|
|
|
|
# verify that we get a sensible error message for bad mode argument
|
|
bad_mode = "qwerty"
|
|
try:
|
|
open(TESTFN, bad_mode)
|
|
except IOError, msg:
|
|
if msg[0] != 0:
|
|
s = str(msg)
|
|
if s.find(TESTFN) != -1 or s.find(bad_mode) == -1:
|
|
print "bad error message for invalid mode: %s" % s
|
|
# if msg[0] == 0, we're probably on Windows where there may be
|
|
# no obvious way to discover why open() failed.
|
|
else:
|
|
print "no error for invalid mode: %s" % bad_mode
|
|
|
|
f = open(TESTFN)
|
|
if f.name != TESTFN:
|
|
raise TestFailed, 'file.name should be "%s"' % TESTFN
|
|
if f.isatty():
|
|
raise TestFailed, 'file.isatty() should be false'
|
|
|
|
if f.closed:
|
|
raise TestFailed, 'file.closed should be false'
|
|
|
|
try:
|
|
f.readinto("")
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
raise TestFailed, 'file.readinto("") should raise a TypeError'
|
|
|
|
f.close()
|
|
if not f.closed:
|
|
raise TestFailed, 'file.closed should be true'
|
|
|
|
# make sure that explicitly setting the buffer size doesn't cause
|
|
# misbehaviour especially with repeated close() calls
|
|
for s in (-1, 0, 1, 512):
|
|
try:
|
|
f = open(TESTFN, 'w', s)
|
|
f.write(str(s))
|
|
f.close()
|
|
f.close()
|
|
f = open(TESTFN, 'r', s)
|
|
d = int(f.read())
|
|
f.close()
|
|
f.close()
|
|
except IOError, msg:
|
|
raise TestFailed, 'error setting buffer size %d: %s' % (s, str(msg))
|
|
if d != s:
|
|
raise TestFailed, 'readback failure using buffer size %d'
|
|
|
|
methods = ['fileno', 'flush', 'isatty', 'next', 'read', 'readinto',
|
|
'readline', 'readlines', 'seek', 'tell', 'truncate', 'write',
|
|
'xreadlines', '__iter__']
|
|
if sys.platform.startswith('atheos'):
|
|
methods.remove('truncate')
|
|
|
|
for methodname in methods:
|
|
method = getattr(f, methodname)
|
|
try:
|
|
method()
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
raise TestFailed, 'file.%s() on a closed file should raise a ValueError' % methodname
|
|
|
|
try:
|
|
f.writelines([])
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
raise TestFailed, 'file.writelines([]) on a closed file should raise a ValueError'
|
|
|
|
os.unlink(TESTFN)
|
|
|
|
def bug801631():
|
|
# SF bug <http://www.python.org/sf/801631>
|
|
# "file.truncate fault on windows"
|
|
f = file(TESTFN, 'wb')
|
|
f.write('12345678901') # 11 bytes
|
|
f.close()
|
|
|
|
f = file(TESTFN,'rb+')
|
|
data = f.read(5)
|
|
if data != '12345':
|
|
raise TestFailed("Read on file opened for update failed %r" % data)
|
|
if f.tell() != 5:
|
|
raise TestFailed("File pos after read wrong %d" % f.tell())
|
|
|
|
f.truncate()
|
|
if f.tell() != 5:
|
|
raise TestFailed("File pos after ftruncate wrong %d" % f.tell())
|
|
|
|
f.close()
|
|
size = os.path.getsize(TESTFN)
|
|
if size != 5:
|
|
raise TestFailed("File size after ftruncate wrong %d" % size)
|
|
|
|
try:
|
|
bug801631()
|
|
finally:
|
|
os.unlink(TESTFN)
|
|
|
|
# Test the complex interaction when mixing file-iteration and the various
|
|
# read* methods. Ostensibly, the mixture could just be tested to work
|
|
# when it should work according to the Python language, instead of fail
|
|
# when it should fail according to the current CPython implementation.
|
|
# People don't always program Python the way they should, though, and the
|
|
# implemenation might change in subtle ways, so we explicitly test for
|
|
# errors, too; the test will just have to be updated when the
|
|
# implementation changes.
|
|
dataoffset = 16384
|
|
filler = "ham\n"
|
|
assert not dataoffset % len(filler), \
|
|
"dataoffset must be multiple of len(filler)"
|
|
nchunks = dataoffset // len(filler)
|
|
testlines = [
|
|
"spam, spam and eggs\n",
|
|
"eggs, spam, ham and spam\n",
|
|
"saussages, spam, spam and eggs\n",
|
|
"spam, ham, spam and eggs\n",
|
|
"spam, spam, spam, spam, spam, ham, spam\n",
|
|
"wonderful spaaaaaam.\n"
|
|
]
|
|
methods = [("readline", ()), ("read", ()), ("readlines", ()),
|
|
("readinto", (array("c", " "*100),))]
|
|
|
|
try:
|
|
# Prepare the testfile
|
|
bag = open(TESTFN, "w")
|
|
bag.write(filler * nchunks)
|
|
bag.writelines(testlines)
|
|
bag.close()
|
|
# Test for appropriate errors mixing read* and iteration
|
|
for methodname, args in methods:
|
|
f = open(TESTFN)
|
|
if f.next() != filler:
|
|
raise TestFailed, "Broken testfile"
|
|
meth = getattr(f, methodname)
|
|
try:
|
|
meth(*args)
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
raise TestFailed("%s%r after next() didn't raise ValueError" %
|
|
(methodname, args))
|
|
f.close()
|
|
|
|
# Test to see if harmless (by accident) mixing of read* and iteration
|
|
# still works. This depends on the size of the internal iteration
|
|
# buffer (currently 8192,) but we can test it in a flexible manner.
|
|
# Each line in the bag o' ham is 4 bytes ("h", "a", "m", "\n"), so
|
|
# 4096 lines of that should get us exactly on the buffer boundary for
|
|
# any power-of-2 buffersize between 4 and 16384 (inclusive).
|
|
f = open(TESTFN)
|
|
for i in range(nchunks):
|
|
f.next()
|
|
testline = testlines.pop(0)
|
|
try:
|
|
line = f.readline()
|
|
except ValueError:
|
|
raise TestFailed("readline() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
if line != testline:
|
|
raise TestFailed("readline() after next() with empty buffer "
|
|
"failed. Got %r, expected %r" % (line, testline))
|
|
testline = testlines.pop(0)
|
|
buf = array("c", "\x00" * len(testline))
|
|
try:
|
|
f.readinto(buf)
|
|
except ValueError:
|
|
raise TestFailed("readinto() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
line = buf.tostring()
|
|
if line != testline:
|
|
raise TestFailed("readinto() after next() with empty buffer "
|
|
"failed. Got %r, expected %r" % (line, testline))
|
|
|
|
testline = testlines.pop(0)
|
|
try:
|
|
line = f.read(len(testline))
|
|
except ValueError:
|
|
raise TestFailed("read() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
if line != testline:
|
|
raise TestFailed("read() after next() with empty buffer "
|
|
"failed. Got %r, expected %r" % (line, testline))
|
|
try:
|
|
lines = f.readlines()
|
|
except ValueError:
|
|
raise TestFailed("readlines() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
if lines != testlines:
|
|
raise TestFailed("readlines() after next() with empty buffer "
|
|
"failed. Got %r, expected %r" % (line, testline))
|
|
# Reading after iteration hit EOF shouldn't hurt either
|
|
f = open(TESTFN)
|
|
try:
|
|
for line in f:
|
|
pass
|
|
try:
|
|
f.readline()
|
|
f.readinto(buf)
|
|
f.read()
|
|
f.readlines()
|
|
except ValueError:
|
|
raise TestFailed("read* failed after next() consumed file")
|
|
finally:
|
|
f.close()
|
|
finally:
|
|
os.unlink(TESTFN)
|