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# Adapted from test_file.py by Daniel Stutzbach
import sys
import os
import unittest
from array import array
from weakref import proxy
from test.test_support import TESTFN, findfile, run_unittest
from UserList import UserList
import _fileio
class AutoFileTests(unittest.TestCase):
# file tests for which a test file is automatically set up
def setUp(self):
self.f = _fileio._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.assertEquals(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.assertEquals(self.f.tell(), 20)
self.f.seek(0)
self.assertEquals(self.f.tell(), 0)
self.f.seek(10)
self.assertEquals(self.f.tell(), 10)
self.f.seek(5, 1)
self.assertEquals(self.f.tell(), 15)
self.f.seek(-5, 1)
self.assertEquals(self.f.tell(), 10)
self.f.seek(-5, 2)
self.assertEquals(self.f.tell(), 15)
def testAttributes(self):
# verify expected attributes exist
f = self.f
# XXX do we want these?
#f.name # merely shouldn't blow up
#f.mode # ditto
#f.closed # ditto
# verify the others aren't
for attr in 'name', 'mode', 'closed':
self.assertRaises((AttributeError, TypeError), setattr, f, attr, 'oops')
def testReadinto(self):
# verify readinto
self.f.write(bytes([1, 2]))
self.f.close()
a = array('b', 'x'*10)
self.f = _fileio._FileIO(TESTFN, 'r')
n = self.f.readinto(a)
self.assertEquals(array('b', [1, 2]), a[:n])
def testRepr(self):
# verify repr works
return # XXX doesn't work yet
self.assert_(repr(self.f).startswith("<open file '" + TESTFN))
def testErrors(self):
f = self.f
self.assert_(not f.isatty())
#self.assert_(not f.closed) # XXX Do we want to support these?
#self.assertEquals(f.name, TESTFN)
self.assertRaises(TypeError, f.readinto, "")
f.close()
#self.assert_(f.closed) # XXX
def testMethods(self):
methods = ['fileno', 'isatty', 'read', 'readinto',
'seek', 'tell', 'truncate', 'write', 'seekable',
'readable', 'writable']
if sys.platform.startswith('atheos'):
methods.remove('truncate')
# __exit__ should close the file
self.f.__exit__(None, None, None)
#self.assert_(self.f.closed) # XXX
for methodname in methods:
method = getattr(self.f, methodname)
# should raise on closed file
self.assertRaises(ValueError, method)
# file is closed, __exit__ shouldn't do anything
self.assertEquals(self.f.__exit__(None, None, None), None)
# it must also return None if an exception was given
try:
1/0
except:
self.assertEquals(self.f.__exit__(*sys.exc_info()), None)
class OtherFileTests(unittest.TestCase):
def testAbles(self):
try:
f = _fileio._FileIO(TESTFN, "w")
self.assertEquals(f.readable(), False)
self.assertEquals(f.writable(), True)
self.assertEquals(f.seekable(), True)
f.close()
f = _fileio._FileIO(TESTFN, "r")
self.assertEquals(f.readable(), True)
self.assertEquals(f.writable(), False)
self.assertEquals(f.seekable(), True)
f.close()
f = _fileio._FileIO(TESTFN, "a+")
self.assertEquals(f.readable(), True)
self.assertEquals(f.writable(), True)
self.assertEquals(f.seekable(), True)
self.assertEquals(f.isatty(), False)
f.close()
f = _fileio._FileIO("/dev/tty", "a") # XXX, won't work on e.g., Windows
self.assertEquals(f.readable(), False)
self.assertEquals(f.writable(), True)
##self.assertEquals(f.seekable(), False) # XXX True on OSX!?
self.assertEquals(f.isatty(), True)
f.close()
finally:
os.unlink(TESTFN)
def testModeStrings(self):
# check invalid mode strings
for mode in ("", "aU", "wU+", "rb", "rt"):
try:
f = _fileio._FileIO(TESTFN, mode)
except ValueError:
pass
else:
f.close()
self.fail('%r is an invalid file mode' % mode)
def testStdin(self):
## This causes the interpreter to exit on OSF1 v5.1.
#if sys.platform != 'osf1V5':
# self.assertRaises(IOError, sys.stdin.seek, -1)
#else:
# print((
# ' Skipping sys.stdin.seek(-1), it may crash the interpreter.'
# ' Test manually.'), file=sys.__stdout__)
#self.assertRaises(IOError, sys.stdin.truncate)
# XXX Comment this out since sys.stdin is currently an old style file
pass
def testUnicodeOpen(self):
# verify repr works for unicode too
f = _fileio._FileIO(unicode(TESTFN), "w")
# XXX doesn't work yet:
##self.assert_(repr(f).startswith("<open file u'" + TESTFN))
f.close()
os.unlink(TESTFN)
def testBadModeArgument(self):
# verify that we get a sensible error message for bad mode argument
bad_mode = "qwerty"
try:
f = _fileio._FileIO(TESTFN, bad_mode)
except ValueError as msg:
if msg.message != 0:
s = str(msg)
if s.find(TESTFN) != -1 or s.find(bad_mode) == -1:
self.fail("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:
f.close()
self.fail("no error for invalid mode: %s" % bad_mode)
def testTruncateOnWindows(self):
def bug801631():
# SF bug <http://www.python.org/sf/801631>
# "file.truncate fault on windows"
f = _fileio._FileIO(TESTFN, 'w')
f.write(bytes(range(11)))
f.close()
f = _fileio._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 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()
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