mirror of https://github.com/python/cpython
335 lines
11 KiB
Python
335 lines
11 KiB
Python
import sys
|
|
import os
|
|
import unittest
|
|
from array import array
|
|
from weakref import proxy
|
|
|
|
import io
|
|
import _pyio as pyio
|
|
|
|
from test.support.os_helper import TESTFN
|
|
from test.support import os_helper
|
|
from test.support import warnings_helper
|
|
from collections import UserList
|
|
|
|
class AutoFileTests:
|
|
# file tests for which a test file is automatically set up
|
|
|
|
def setUp(self):
|
|
self.f = self.open(TESTFN, 'wb')
|
|
|
|
def tearDown(self):
|
|
if self.f:
|
|
self.f.close()
|
|
os_helper.unlink(TESTFN)
|
|
|
|
def testWeakRefs(self):
|
|
# verify weak references
|
|
p = proxy(self.f)
|
|
p.write(b'teststring')
|
|
self.assertEqual(self.f.tell(), p.tell())
|
|
self.f.close()
|
|
self.f = None
|
|
self.assertRaises(ReferenceError, getattr, p, 'tell')
|
|
|
|
def testAttributes(self):
|
|
# verify expected attributes exist
|
|
f = self.f
|
|
f.name # merely shouldn't blow up
|
|
f.mode # ditto
|
|
f.closed # ditto
|
|
|
|
def testReadinto(self):
|
|
# verify readinto
|
|
self.f.write(b'12')
|
|
self.f.close()
|
|
a = array('b', b'x'*10)
|
|
self.f = self.open(TESTFN, 'rb')
|
|
n = self.f.readinto(a)
|
|
self.assertEqual(b'12', a.tobytes()[:n])
|
|
|
|
def testReadinto_text(self):
|
|
# verify readinto refuses text files
|
|
a = array('b', b'x'*10)
|
|
self.f.close()
|
|
self.f = self.open(TESTFN, encoding="utf-8")
|
|
if hasattr(self.f, "readinto"):
|
|
self.assertRaises(TypeError, self.f.readinto, a)
|
|
|
|
def testWritelinesUserList(self):
|
|
# verify writelines with instance sequence
|
|
l = UserList([b'1', b'2'])
|
|
self.f.writelines(l)
|
|
self.f.close()
|
|
self.f = self.open(TESTFN, 'rb')
|
|
buf = self.f.read()
|
|
self.assertEqual(buf, b'12')
|
|
|
|
def testWritelinesIntegers(self):
|
|
# verify writelines with integers
|
|
self.assertRaises(TypeError, self.f.writelines, [1, 2, 3])
|
|
|
|
def testWritelinesIntegersUserList(self):
|
|
# verify writelines with integers in UserList
|
|
l = UserList([1,2,3])
|
|
self.assertRaises(TypeError, self.f.writelines, l)
|
|
|
|
def testWritelinesNonString(self):
|
|
# verify writelines with non-string object
|
|
class NonString:
|
|
pass
|
|
|
|
self.assertRaises(TypeError, self.f.writelines,
|
|
[NonString(), NonString()])
|
|
|
|
def testErrors(self):
|
|
f = self.f
|
|
self.assertEqual(f.name, TESTFN)
|
|
self.assertFalse(f.isatty())
|
|
self.assertFalse(f.closed)
|
|
|
|
if hasattr(f, "readinto"):
|
|
self.assertRaises((OSError, TypeError), f.readinto, "")
|
|
f.close()
|
|
self.assertTrue(f.closed)
|
|
|
|
def testMethods(self):
|
|
methods = [('fileno', ()),
|
|
('flush', ()),
|
|
('isatty', ()),
|
|
('__next__', ()),
|
|
('read', ()),
|
|
('write', (b"",)),
|
|
('readline', ()),
|
|
('readlines', ()),
|
|
('seek', (0,)),
|
|
('tell', ()),
|
|
('write', (b"",)),
|
|
('writelines', ([],)),
|
|
('__iter__', ()),
|
|
]
|
|
methods.append(('truncate', ()))
|
|
|
|
# __exit__ should close the file
|
|
self.f.__exit__(None, None, None)
|
|
self.assertTrue(self.f.closed)
|
|
|
|
for methodname, args in methods:
|
|
method = getattr(self.f, methodname)
|
|
# should raise on closed file
|
|
self.assertRaises(ValueError, method, *args)
|
|
|
|
# file is closed, __exit__ shouldn't do anything
|
|
self.assertEqual(self.f.__exit__(None, None, None), None)
|
|
# it must also return None if an exception was given
|
|
try:
|
|
1/0
|
|
except:
|
|
self.assertEqual(self.f.__exit__(*sys.exc_info()), None)
|
|
|
|
def testReadWhenWriting(self):
|
|
self.assertRaises(OSError, self.f.read)
|
|
|
|
class CAutoFileTests(AutoFileTests, unittest.TestCase):
|
|
open = io.open
|
|
|
|
class PyAutoFileTests(AutoFileTests, unittest.TestCase):
|
|
open = staticmethod(pyio.open)
|
|
|
|
|
|
class OtherFileTests:
|
|
|
|
def tearDown(self):
|
|
os_helper.unlink(TESTFN)
|
|
|
|
def testModeStrings(self):
|
|
# check invalid mode strings
|
|
self.open(TESTFN, 'wb').close()
|
|
for mode in ("", "aU", "wU+", "U+", "+U", "rU+"):
|
|
try:
|
|
f = self.open(TESTFN, mode)
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
f.close()
|
|
self.fail('%r is an invalid file mode' % mode)
|
|
|
|
def testBadModeArgument(self):
|
|
# verify that we get a sensible error message for bad mode argument
|
|
bad_mode = "qwerty"
|
|
try:
|
|
f = self.open(TESTFN, bad_mode)
|
|
except ValueError as msg:
|
|
if msg.args[0] != 0:
|
|
s = str(msg)
|
|
if TESTFN in s or bad_mode not in s:
|
|
self.fail("bad error message for invalid mode: %s" % s)
|
|
# if msg.args[0] == 0, we're probably on Windows where there may be
|
|
# no obvious way to discover why open() failed.
|
|
else:
|
|
f.close()
|
|
self.fail("no error for invalid mode: %s" % bad_mode)
|
|
|
|
def _checkBufferSize(self, s):
|
|
try:
|
|
f = self.open(TESTFN, 'wb', s)
|
|
f.write(str(s).encode("ascii"))
|
|
f.close()
|
|
f.close()
|
|
f = self.open(TESTFN, 'rb', s)
|
|
d = int(f.read().decode("ascii"))
|
|
f.close()
|
|
f.close()
|
|
except OSError as msg:
|
|
self.fail('error setting buffer size %d: %s' % (s, str(msg)))
|
|
self.assertEqual(d, s)
|
|
|
|
def testSetBufferSize(self):
|
|
# make sure that explicitly setting the buffer size doesn't cause
|
|
# misbehaviour especially with repeated close() calls
|
|
for s in (-1, 0, 512):
|
|
with warnings_helper.check_no_warnings(self,
|
|
message='line buffering',
|
|
category=RuntimeWarning):
|
|
self._checkBufferSize(s)
|
|
|
|
# test that attempts to use line buffering in binary mode cause
|
|
# a warning
|
|
with self.assertWarnsRegex(RuntimeWarning, 'line buffering'):
|
|
self._checkBufferSize(1)
|
|
|
|
def testTruncateOnWindows(self):
|
|
# SF bug <http://www.python.org/sf/801631>
|
|
# "file.truncate fault on windows"
|
|
|
|
f = self.open(TESTFN, 'wb')
|
|
|
|
try:
|
|
f.write(b'12345678901') # 11 bytes
|
|
f.close()
|
|
|
|
f = self.open(TESTFN,'rb+')
|
|
data = f.read(5)
|
|
if data != b'12345':
|
|
self.fail("Read on file opened for update failed %r" % data)
|
|
if f.tell() != 5:
|
|
self.fail("File pos after read wrong %d" % f.tell())
|
|
|
|
f.truncate()
|
|
if f.tell() != 5:
|
|
self.fail("File pos after ftruncate wrong %d" % f.tell())
|
|
|
|
f.close()
|
|
size = os.path.getsize(TESTFN)
|
|
if size != 5:
|
|
self.fail("File size after ftruncate wrong %d" % size)
|
|
finally:
|
|
f.close()
|
|
|
|
def testIteration(self):
|
|
# Test the complex interaction when mixing file-iteration and the
|
|
# various read* methods.
|
|
dataoffset = 16384
|
|
filler = b"ham\n"
|
|
assert not dataoffset % len(filler), \
|
|
"dataoffset must be multiple of len(filler)"
|
|
nchunks = dataoffset // len(filler)
|
|
testlines = [
|
|
b"spam, spam and eggs\n",
|
|
b"eggs, spam, ham and spam\n",
|
|
b"saussages, spam, spam and eggs\n",
|
|
b"spam, ham, spam and eggs\n",
|
|
b"spam, spam, spam, spam, spam, ham, spam\n",
|
|
b"wonderful spaaaaaam.\n"
|
|
]
|
|
methods = [("readline", ()), ("read", ()), ("readlines", ()),
|
|
("readinto", (array("b", b" "*100),))]
|
|
|
|
# Prepare the testfile
|
|
bag = self.open(TESTFN, "wb")
|
|
bag.write(filler * nchunks)
|
|
bag.writelines(testlines)
|
|
bag.close()
|
|
# Test for appropriate errors mixing read* and iteration
|
|
for methodname, args in methods:
|
|
f = self.open(TESTFN, 'rb')
|
|
self.assertEqual(next(f), filler)
|
|
meth = getattr(f, methodname)
|
|
meth(*args) # This simply shouldn't fail
|
|
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 = self.open(TESTFN, 'rb')
|
|
for i in range(nchunks):
|
|
next(f)
|
|
testline = testlines.pop(0)
|
|
try:
|
|
line = f.readline()
|
|
except ValueError:
|
|
self.fail("readline() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
if line != testline:
|
|
self.fail("readline() after next() with empty buffer "
|
|
"failed. Got %r, expected %r" % (line, testline))
|
|
testline = testlines.pop(0)
|
|
buf = array("b", b"\x00" * len(testline))
|
|
try:
|
|
f.readinto(buf)
|
|
except ValueError:
|
|
self.fail("readinto() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
line = buf.tobytes()
|
|
if line != testline:
|
|
self.fail("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:
|
|
self.fail("read() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
if line != testline:
|
|
self.fail("read() after next() with empty buffer "
|
|
"failed. Got %r, expected %r" % (line, testline))
|
|
try:
|
|
lines = f.readlines()
|
|
except ValueError:
|
|
self.fail("readlines() after next() with supposedly empty "
|
|
"iteration-buffer failed anyway")
|
|
if lines != testlines:
|
|
self.fail("readlines() after next() with empty buffer "
|
|
"failed. Got %r, expected %r" % (line, testline))
|
|
f.close()
|
|
|
|
# Reading after iteration hit EOF shouldn't hurt either
|
|
f = self.open(TESTFN, 'rb')
|
|
try:
|
|
for line in f:
|
|
pass
|
|
try:
|
|
f.readline()
|
|
f.readinto(buf)
|
|
f.read()
|
|
f.readlines()
|
|
except ValueError:
|
|
self.fail("read* failed after next() consumed file")
|
|
finally:
|
|
f.close()
|
|
|
|
class COtherFileTests(OtherFileTests, unittest.TestCase):
|
|
open = io.open
|
|
|
|
class PyOtherFileTests(OtherFileTests, unittest.TestCase):
|
|
open = staticmethod(pyio.open)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|