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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 collections 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
self.assertEquals(f.mode, "w")
self.assertEquals(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(bytes([1, 2]))
self.f.close()
a = array('b', 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):
self.assertEquals(repr(self.f),
"_fileio._FileIO(%d, %s)" % (self.f.fileno(),
repr(self.f.mode)))
def testErrors(self):
f = self.f
self.assert_(not f.isatty())
self.assert_(not f.closed)
#self.assertEquals(f.name, TESTFN)
self.assertRaises(ValueError, f.read, 10) # Open for reading
f.close()
self.assert_(f.closed)
f = _fileio._FileIO(TESTFN, 'r')
self.assertRaises(TypeError, f.readinto, "")
self.assert_(not f.closed)
f.close()
self.assert_(f.closed)
def testMethods(self):
methods = ['fileno', 'isatty', 'read', 'readinto',
'seek', 'tell', 'truncate', 'write', 'seekable',
'readable', 'writable']
if sys.platform.startswith('atheos'):
methods.remove('truncate')
self.f.close()
self.assert_(self.f.closed)
for methodname in methods:
method = getattr(self.f, methodname)
# should raise on closed file
self.assertRaises(ValueError, method)
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()
if sys.platform != "win32":
try:
f = _fileio._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.
pass
else:
f = _fileio._FileIO("/dev/tty", "a")
self.assertEquals(f.readable(), False)
self.assertEquals(f.writable(), True)
if sys.platform != "darwin" and \
not sys.platform.startswith('freebsd'):
# Somehow /dev/tty appears seekable on some BSDs
self.assertEquals(f.seekable(), False)
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 testUnicodeOpen(self):
# verify repr works for unicode too
f = _fileio._FileIO(str(TESTFN), "w")
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.args[0] != 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.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 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 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 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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