Mini Shell
# Adapted from test_file.py by Daniel Stutzbach
from __future__ import unicode_literals
import sys
import os
import errno
import unittest
from array import array
from weakref import proxy
from functools import wraps
from UserList import UserList
from test.test_support import TESTFN, check_warnings, run_unittest, make_bad_fd
from test.test_support import py3k_bytes as bytes, cpython_only
from test.script_helper import run_python
from _io import FileIO as _FileIO
class AutoFileTests(unittest.TestCase):
# file tests for which a test file is automatically set up
def setUp(self):
self.f = _FileIO(TESTFN, 'w')
def tearDown(self):
if self.f:
self.f.close()
os.remove(TESTFN)
def testWeakRefs(self):
# verify weak references
p = proxy(self.f)
p.write(bytes(range(10)))
self.assertEqual(self.f.tell(), p.tell())
self.f.close()
self.f = None
self.assertRaises(ReferenceError, getattr, p, 'tell')
def testSeekTell(self):
self.f.write(bytes(range(20)))
self.assertEqual(self.f.tell(), 20)
self.f.seek(0)
self.assertEqual(self.f.tell(), 0)
self.f.seek(10)
self.assertEqual(self.f.tell(), 10)
self.f.seek(5, 1)
self.assertEqual(self.f.tell(), 15)
self.f.seek(-5, 1)
self.assertEqual(self.f.tell(), 10)
self.f.seek(-5, 2)
self.assertEqual(self.f.tell(), 15)
def testAttributes(self):
# verify expected attributes exist
f = self.f
self.assertEqual(f.mode, "wb")
self.assertEqual(f.closed, False)
# verify the attributes are readonly
for attr in 'mode', 'closed':
self.assertRaises((AttributeError, TypeError),
setattr, f, attr, 'oops')
def testReadinto(self):
# verify readinto
self.f.write(b"\x01\x02")
self.f.close()
a = array(b'b', b'x'*10)
self.f = _FileIO(TESTFN, 'r')
n = self.f.readinto(a)
self.assertEqual(array(b'b', [1, 2]), a[:n])
def testWritelinesList(self):
l = [b'123', b'456']
self.f.writelines(l)
self.f.close()
self.f = _FileIO(TESTFN, 'rb')
buf = self.f.read()
self.assertEqual(buf, b'123456')
def testWritelinesUserList(self):
l = UserList([b'123', b'456'])
self.f.writelines(l)
self.f.close()
self.f = _FileIO(TESTFN, 'rb')
buf = self.f.read()
self.assertEqual(buf, b'123456')
def testWritelinesError(self):
self.assertRaises(TypeError, self.f.writelines, [1, 2, 3])
self.assertRaises(TypeError, self.f.writelines, None)
def test_none_args(self):
self.f.write(b"hi\nbye\nabc")
self.f.close()
self.f = _FileIO(TESTFN, 'r')
self.assertEqual(self.f.read(None), b"hi\nbye\nabc")
self.f.seek(0)
self.assertEqual(self.f.readline(None), b"hi\n")
self.assertEqual(self.f.readlines(None), [b"bye\n", b"abc"])
def testRepr(self):
self.assertEqual(repr(self.f), "<_io.FileIO name=%r mode='%s'>"
% (self.f.name, self.f.mode))
del self.f.name
self.assertEqual(repr(self.f), "<_io.FileIO fd=%r mode='%s'>"
% (self.f.fileno(), self.f.mode))
self.f.close()
self.assertEqual(repr(self.f), "<_io.FileIO [closed]>")
def testErrors(self):
f = self.f
self.assertFalse(f.isatty())
self.assertFalse(f.closed)
#self.assertEqual(f.name, TESTFN)
self.assertRaises(ValueError, f.read, 10) # Open for reading
f.close()
self.assertTrue(f.closed)
f = _FileIO(TESTFN, 'r')
self.assertRaises(TypeError, f.readinto, "")
self.assertFalse(f.closed)
f.close()
self.assertTrue(f.closed)
def testMethods(self):
methods = ['fileno', 'isatty', 'seekable', 'readable', 'writable',
'read', 'readall', 'readline', 'readlines',
'tell', 'truncate', 'flush']
if sys.platform.startswith('atheos'):
methods.remove('truncate')
self.f.close()
self.assertTrue(self.f.closed)
for methodname in methods:
method = getattr(self.f, methodname)
# should raise on closed file
self.assertRaises(ValueError, method)
self.assertRaises(ValueError, self.f.readinto) # XXX should be TypeError?
self.assertRaises(ValueError, self.f.readinto, bytearray(1))
self.assertRaises(ValueError, self.f.seek)
self.assertRaises(ValueError, self.f.seek, 0)
self.assertRaises(ValueError, self.f.write)
self.assertRaises(ValueError, self.f.write, b'')
self.assertRaises(TypeError, self.f.writelines)
self.assertRaises(ValueError, self.f.writelines, b'')
def testOpendir(self):
# Issue 3703: opening a directory should fill the errno
# Windows always returns "[Errno 13]: Permission denied
# Unix calls dircheck() and returns "[Errno 21]: Is a directory"
try:
_FileIO('.', 'r')
except IOError as e:
self.assertNotEqual(e.errno, 0)
self.assertEqual(e.filename, ".")
else:
self.fail("Should have raised IOError")
@unittest.skipIf(os.name == 'nt', "test only works on a POSIX-like system")
def testOpenDirFD(self):
fd = os.open('.', os.O_RDONLY)
with self.assertRaises(IOError) as cm:
_FileIO(fd, 'r')
os.close(fd)
self.assertEqual(cm.exception.errno, errno.EISDIR)
#A set of functions testing that we get expected behaviour if someone has
#manually closed the internal file descriptor. First, a decorator:
def ClosedFD(func):
@wraps(func)
def wrapper(self):
#forcibly close the fd before invoking the problem function
f = self.f
os.close(f.fileno())
try:
func(self, f)
finally:
try:
self.f.close()
except IOError:
pass
return wrapper
def ClosedFDRaises(func):
@wraps(func)
def wrapper(self):
#forcibly close the fd before invoking the problem function
f = self.f
os.close(f.fileno())
try:
func(self, f)
except IOError as e:
self.assertEqual(e.errno, errno.EBADF)
else:
self.fail("Should have raised IOError")
finally:
try:
self.f.close()
except IOError:
pass
return wrapper
@ClosedFDRaises
def testErrnoOnClose(self, f):
f.close()
@ClosedFDRaises
def testErrnoOnClosedWrite(self, f):
f.write('a')
@ClosedFDRaises
def testErrnoOnClosedSeek(self, f):
f.seek(0)
@ClosedFDRaises
def testErrnoOnClosedTell(self, f):
f.tell()
@ClosedFDRaises
def testErrnoOnClosedTruncate(self, f):
f.truncate(0)
@ClosedFD
def testErrnoOnClosedSeekable(self, f):
f.seekable()
@ClosedFD
def testErrnoOnClosedReadable(self, f):
f.readable()
@ClosedFD
def testErrnoOnClosedWritable(self, f):
f.writable()
@ClosedFD
def testErrnoOnClosedFileno(self, f):
f.fileno()
@ClosedFD
def testErrnoOnClosedIsatty(self, f):
self.assertEqual(f.isatty(), False)
def ReopenForRead(self):
try:
self.f.close()
except IOError:
pass
self.f = _FileIO(TESTFN, 'r')
os.close(self.f.fileno())
return self.f
@ClosedFDRaises
def testErrnoOnClosedRead(self, f):
f = self.ReopenForRead()
f.read(1)
@ClosedFDRaises
def testErrnoOnClosedReadall(self, f):
f = self.ReopenForRead()
f.readall()
@ClosedFDRaises
def testErrnoOnClosedReadinto(self, f):
f = self.ReopenForRead()
a = array(b'b', b'x'*10)
f.readinto(a)
class OtherFileTests(unittest.TestCase):
def testAbles(self):
try:
f = _FileIO(TESTFN, "w")
self.assertEqual(f.readable(), False)
self.assertEqual(f.writable(), True)
self.assertEqual(f.seekable(), True)
f.close()
f = _FileIO(TESTFN, "r")
self.assertEqual(f.readable(), True)
self.assertEqual(f.writable(), False)
self.assertEqual(f.seekable(), True)
f.close()
f = _FileIO(TESTFN, "a+")
self.assertEqual(f.readable(), True)
self.assertEqual(f.writable(), True)
self.assertEqual(f.seekable(), True)
self.assertEqual(f.isatty(), False)
f.close()
finally:
os.unlink(TESTFN)
@unittest.skipIf(sys.platform == 'win32', 'no ttys on Windows')
def testAblesOnTTY(self):
try:
f = _FileIO("/dev/tty", "a")
except EnvironmentError:
# When run in a cron job there just aren't any
# ttys, so skip the test. This also handles other
# OS'es that don't support /dev/tty.
self.skipTest('need /dev/tty')
else:
self.assertEqual(f.readable(), False)
self.assertEqual(f.writable(), True)
if sys.platform != "darwin" and \
'bsd' not in sys.platform and \
not sys.platform.startswith('sunos'):
# Somehow /dev/tty appears seekable on some BSDs
self.assertEqual(f.seekable(), False)
self.assertEqual(f.isatty(), True)
f.close()
def testInvalidModeStrings(self):
# check invalid mode strings
for mode in ("", "aU", "wU+", "rw", "rt"):
try:
f = _FileIO(TESTFN, mode)
except ValueError:
pass
else:
f.close()
self.fail('%r is an invalid file mode' % mode)
def testModeStrings(self):
# test that the mode attribute is correct for various mode strings
# given as init args
try:
for modes in [('w', 'wb'), ('wb', 'wb'), ('wb+', 'rb+'),
('w+b', 'rb+'), ('a', 'ab'), ('ab', 'ab'),
('ab+', 'ab+'), ('a+b', 'ab+'), ('r', 'rb'),
('rb', 'rb'), ('rb+', 'rb+'), ('r+b', 'rb+')]:
# read modes are last so that TESTFN will exist first
with _FileIO(TESTFN, modes[0]) as f:
self.assertEqual(f.mode, modes[1])
finally:
if os.path.exists(TESTFN):
os.unlink(TESTFN)
def testUnicodeOpen(self):
# verify repr works for unicode too
f = _FileIO(str(TESTFN), "w")
f.close()
os.unlink(TESTFN)
def testBytesOpen(self):
# Opening a bytes filename
try:
fn = TESTFN.encode("ascii")
except UnicodeEncodeError:
self.skipTest('could not encode %r to ascii' % TESTFN)
f = _FileIO(fn, "w")
try:
f.write(b"abc")
f.close()
with open(TESTFN, "rb") as f:
self.assertEqual(f.read(), b"abc")
finally:
os.unlink(TESTFN)
def testInvalidFd(self):
self.assertRaises(ValueError, _FileIO, -10)
self.assertRaises(OSError, _FileIO, make_bad_fd())
if sys.platform == 'win32':
import msvcrt
self.assertRaises(IOError, msvcrt.get_osfhandle, make_bad_fd())
@cpython_only
def testInvalidFd_overflow(self):
# Issue 15989
import _testcapi
self.assertRaises(TypeError, _FileIO, _testcapi.INT_MAX + 1)
self.assertRaises(TypeError, _FileIO, _testcapi.INT_MIN - 1)
def testBadModeArgument(self):
# verify that we get a sensible error message for bad mode argument
bad_mode = "qwerty"
try:
f = _FileIO(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 testTruncate(self):
f = _FileIO(TESTFN, 'w')
f.write(bytes(bytearray(range(10))))
self.assertEqual(f.tell(), 10)
f.truncate(5)
self.assertEqual(f.tell(), 10)
self.assertEqual(f.seek(0, os.SEEK_END), 5)
f.truncate(15)
self.assertEqual(f.tell(), 5)
self.assertEqual(f.seek(0, os.SEEK_END), 15)
f.close()
def testTruncateOnWindows(self):
def bug801631():
# SF bug <http://www.python.org/sf/801631>
# "file.truncate fault on windows"
f = _FileIO(TESTFN, 'w')
f.write(bytes(range(11)))
f.close()
f = _FileIO(TESTFN,'r+')
data = f.read(5)
if data != bytes(range(5)):
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)
try:
bug801631()
finally:
os.unlink(TESTFN)
def testAppend(self):
try:
f = open(TESTFN, 'wb')
f.write(b'spam')
f.close()
f = open(TESTFN, 'ab')
f.write(b'eggs')
f.close()
f = open(TESTFN, 'rb')
d = f.read()
f.close()
self.assertEqual(d, b'spameggs')
finally:
try:
os.unlink(TESTFN)
except:
pass
def testInvalidInit(self):
self.assertRaises(TypeError, _FileIO, "1", 0, 0)
def testWarnings(self):
with check_warnings(quiet=True) as w:
self.assertEqual(w.warnings, [])
self.assertRaises(TypeError, _FileIO, [])
self.assertEqual(w.warnings, [])
self.assertRaises(ValueError, _FileIO, "/some/invalid/name", "rt")
self.assertEqual(w.warnings, [])
def test_surrogates(self):
# Issue #8438: try to open a filename containing surrogates.
# It should either fail because the file doesn't exist or the filename
# can't be represented using the filesystem encoding, but not because
# of a LookupError for the error handler "surrogateescape".
filename = u'\udc80.txt'
try:
with _FileIO(filename):
pass
except (UnicodeEncodeError, IOError):
pass
# Spawn a separate Python process with a different "file system
# default encoding", to exercise this further.
env = dict(os.environ)
env[b'LC_CTYPE'] = b'C'
_, out = run_python('-c', 'import _io; _io.FileIO(%r)' % filename, env=env)
if ('UnicodeEncodeError' not in out and not
( ('IOError: [Errno 2] No such file or directory' in out) or
('IOError: [Errno 22] Invalid argument' in out) ) ):
self.fail('Bad output: %r' % out)
def testUnclosedFDOnException(self):
class MyException(Exception): pass
class MyFileIO(_FileIO):
def __setattr__(self, name, value):
if name == "name":
raise MyException("blocked setting name")
return super(MyFileIO, self).__setattr__(name, value)
fd = os.open(__file__, os.O_RDONLY)
self.assertRaises(MyException, MyFileIO, fd)
os.close(fd) # should not raise OSError(EBADF)
def test_main():
# Historically, these tests have been sloppy about removing TESTFN.
# So get rid of it no matter what.
try:
run_unittest(AutoFileTests, OtherFileTests)
finally:
if os.path.exists(TESTFN):
os.unlink(TESTFN)
if __name__ == '__main__':
test_main()
Zerion Mini Shell 1.0