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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
The newest version!
import sys
import os
import errno
import unittest
import time
from array import array
from weakref import proxy
try:
import threading
except ImportError:
threading = None
from test import test_support
from test.test_support import TESTFN, run_unittest, is_jython, is_jython_nt
from UserList import UserList
class AutoFileTests(unittest.TestCase):
# file tests for which a test file is automatically set up
def setUp(self):
self.f = open(TESTFN, 'wb')
def tearDown(self):
if self.f:
self.f.close()
os.remove(TESTFN)
def testWeakRefs(self):
# verify weak references
p = proxy(self.f)
p.write('teststring')
self.assertEqual(self.f.tell(), p.tell())
self.f.close()
self.f = None
if test_support.is_jython: # GC is not immediate: borrow a trick
from test_weakref import extra_collect
extra_collect()
self.assertRaises(ReferenceError, getattr, p, 'tell')
def testAttributes(self):
# verify expected attributes exist
f = self.f
with test_support.check_py3k_warnings():
softspace = f.softspace
f.name # merely shouldn't blow up
f.mode # ditto
f.closed # ditto
with test_support.check_py3k_warnings():
# verify softspace is writable
f.softspace = softspace # merely shouldn't blow up
# 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('12')
self.f.close()
a = array('c', 'x'*10)
self.f = open(TESTFN, 'rb')
n = self.f.readinto(a)
self.assertEqual('12', a.tostring()[:n])
def testWritelinesUserList(self):
# verify writelines with instance sequence
l = UserList(['1', '2'])
self.f.writelines(l)
self.f.close()
self.f = open(TESTFN, 'rb')
buf = self.f.read()
self.assertEqual(buf, '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 testRepr(self):
# verify repr works
self.assertTrue(repr(self.f).startswith(">sys.__stdout__, (
' Skipping sys.stdin.seek(-1), it may crash the interpreter.'
' Test manually.')
self.assertRaises(IOError, sys.stdin.truncate)
def testUnicodeOpen(self):
# verify repr works for unicode too
self.f = f = open(unicode(TESTFN), "w")
self.assertTrue(repr(f).startswith("
# "file.truncate fault on windows"
self.f = f = open(TESTFN, 'wb')
f.write('12345678901') # 11 bytes
f.close()
self.f = f = open(TESTFN,'rb+')
data = f.read(5)
if data != '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)
try:
bug801631()
finally:
os.unlink(TESTFN)
@unittest.skipIf(test_support.is_jython, "Specific to CPython")
def testIteration(self):
# 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:
self.f = f = open(TESTFN)
if f.next() != filler:
self.fail, "Broken testfile"
meth = getattr(f, methodname)
try:
meth(*args)
except ValueError:
pass
else:
self.fail("%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).
self.f = f = open(TESTFN)
for i in range(nchunks):
f.next()
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("c", "\x00" * len(testline))
try:
f.readinto(buf)
except ValueError:
self.fail("readinto() after next() with supposedly empty "
"iteration-buffer failed anyway")
line = buf.tostring()
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))
# Reading after iteration hit EOF shouldn't hurt either
self.f = f = open(TESTFN)
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()
finally:
os.unlink(TESTFN)
@unittest.skipUnless(test_support.is_jython, "Applicable to Jython")
def testIterationMixes(self):
# And now for something completely different. An implementation where
# various read* methods mix happily with iteration over the lines of
# a file using next().
sheep = [
"It's my belief that these sheep\n",
"are labouring under the\n",
"mis-apprehension that they're birds.\n",
"Now witness their attempts\n",
"to fly from tree to tree.\n",
"Notice that they do not so much fly\n",
"as plummet.\n"
]
# Prepare the testfile
self.f = f = open(TESTFN, "w")
f.writelines(sheep)
f.close()
# Test for appropriate results mixing read* and iteration
self.f = f = open(TESTFN)
self.assertEqual(f.next(), sheep[0])
self.assertEqual(f.readline(), sheep[1])
self.assertEqual(f.next(), sheep[2])
self.assertEqual(f.read(5), sheep[3][:5])
r = array('c', "1234567")
f.readinto(r)
self.assertEqual(r, array('c', sheep[3][5:12]))
self.assertEqual(f.next(), sheep[3][12:])
r = f.readlines()
self.assertEqual(r, sheep[4:])
self.assertRaises(StopIteration, f.next)
f.close()
class FileSubclassTests(unittest.TestCase):
def testExit(self):
# test that exiting with context calls subclass' close
class C(file):
def __init__(self, *args):
self.subclass_closed = False
file.__init__(self, *args)
def close(self):
self.subclass_closed = True
file.close(self)
with C(TESTFN, 'w') as f:
pass
self.assertTrue(f.subclass_closed)
@unittest.skipUnless(threading, 'Threading required for this test.')
class FileThreadingTests(unittest.TestCase):
# These tests check the ability to call various methods of file objects
# (including close()) concurrently without crashing the Python interpreter.
# See #815646, #595601
# Modified for Jython so that each worker thread holds *and closes* its own
# file object, since we cannot rely on immediate garbage collection closing
# files. (Open file objects prevent deletion of TESTFN on Windows at least.)
def setUp(self):
self._threads = test_support.threading_setup()
self.filename = TESTFN
self.exc_info = None
with open(self.filename, "w") as f:
f.write("\n".join("0123456789"))
self._count_lock = threading.Lock()
self.close_count = 0
self.close_success_count = 0
self.use_buffering = False
def tearDown(self):
try:
os.remove(self.filename)
except EnvironmentError as ee:
# (Jython addition) detect failure common on Windows, on missing
# close, that creates spurious errors in subsequent tests.
if ee.errno != errno.ENOENT:
raise ee
test_support.threading_cleanup(*self._threads)
def _create_file(self):
if self.use_buffering:
return open(self.filename, "w+", buffering=1024*16)
else:
return open(self.filename, "w+")
def _close_file(self, f):
with self._count_lock:
self.close_count += 1
f.close()
with self._count_lock:
self.close_success_count += 1
# Close one file object and return a new one
def _close_and_reopen_file(self, f):
self._close_file(f)
return self._create_file()
def _run_workers(self, func, nb_workers, duration=0.2):
with self._count_lock:
self.close_count = 0
self.close_success_count = 0
self.do_continue = True
threads = []
try:
for i in range(nb_workers):
t = threading.Thread(target=func)
t.start()
threads.append(t)
for _ in xrange(100):
time.sleep(duration/100)
with self._count_lock:
if self.close_count-self.close_success_count > nb_workers+1:
if test_support.verbose:
print 'Q',
break
time.sleep(duration)
finally:
self.do_continue = False
for t in threads:
t.join()
def _test_close_open_io(self, io_func, nb_workers=5):
def worker():
# Each worker has its own currently open file object
myfile = None
try:
myfile = self._create_file()
while self.do_continue:
io_func(myfile)
myfile = self._close_and_reopen_file(myfile)
except Exception as e:
# Stop the test (other threads) and remember why
self.do_continue = False
self.exc_info = sys.exc_info()
# Finally close the last file object
if myfile:
self._close_file(myfile)
self._run_workers(worker, nb_workers)
if self.exc_info:
# Some worker saved an exception: re-raise it now
raise self.exc_info[0], self.exc_info[1], self.exc_info[2]
if test_support.verbose:
# Useful verbose statistics when tuning this test to take
# less time to run but still ensuring that its still useful.
#
# the percent of close calls that raised an error
percent = 100.
if self.close_count > 0:
percent -= 100.*self.close_success_count/self.close_count
print self.close_count, ('%.4f ' % percent),
# Each test function defines an operation on the worker's file object
def test_close_open(self):
def io_func(f):
pass
self._test_close_open_io(io_func)
def test_close_open_flush(self):
def io_func(f):
f.flush()
self._test_close_open_io(io_func)
def test_close_open_iter(self):
def io_func(f):
list(iter(f))
self._test_close_open_io(io_func)
def test_close_open_isatty(self):
def io_func(f):
f.isatty()
self._test_close_open_io(io_func)
def test_close_open_print(self):
def io_func(f):
print >> f, ''
self._test_close_open_io(io_func)
def test_close_open_print_buffered(self):
self.use_buffering = True
def io_func(f):
print >> f, ''
self._test_close_open_io(io_func)
def test_close_open_read(self):
def io_func(f):
f.read(0)
self._test_close_open_io(io_func)
def test_close_open_readinto(self):
def io_func(f):
a = array('c', 'xxxxx')
f.readinto(a)
self._test_close_open_io(io_func)
def test_close_open_readline(self):
def io_func(f):
f.readline()
self._test_close_open_io(io_func)
def test_close_open_readlines(self):
def io_func(f):
f.readlines()
self._test_close_open_io(io_func)
def test_close_open_seek(self):
def io_func(f):
f.seek(0, 0)
self._test_close_open_io(io_func)
def test_close_open_tell(self):
def io_func(f):
f.tell()
self._test_close_open_io(io_func)
def test_close_open_truncate(self):
def io_func(f):
f.truncate()
self._test_close_open_io(io_func)
def test_close_open_write(self):
def io_func(f):
f.write('')
self._test_close_open_io(io_func)
def test_close_open_writelines(self):
def io_func(f):
f.writelines('')
self._test_close_open_io(io_func)
class StdoutTests(unittest.TestCase):
def test_move_stdout_on_write(self):
# Issue 3242: sys.stdout can be replaced (and freed) during a
# print statement; prevent a segfault in this case
save_stdout = sys.stdout
class File:
def write(self, data):
if '\n' in data:
sys.stdout = save_stdout
try:
sys.stdout = File()
print "some text"
finally:
sys.stdout = save_stdout
def test_del_stdout_before_print(self):
# Issue 4597: 'print' with no argument wasn't reporting when
# sys.stdout was deleted.
save_stdout = sys.stdout
del sys.stdout
try:
print
except RuntimeError as e:
self.assertEqual(str(e), "lost sys.stdout")
else:
self.fail("Expected RuntimeError")
finally:
sys.stdout = save_stdout
@unittest.skipIf(is_jython_nt, "FIXME: utf-16 decode error, see issue 2312")
def test_unicode(self):
import subprocess
def get_message(encoding, *code):
code = ';'.join(code) # jython.bat cannot cope with '\n' in arguments
env = os.environ.copy()
env['PYTHONIOENCODING'] = encoding
process = subprocess.Popen([sys.executable, "-c", code],
stdout=subprocess.PIPE, env=env)
stdout, stderr = process.communicate()
self.assertEqual(process.returncode, 0)
return stdout
def check_message(text, encoding, expected):
stdout = get_message(encoding,
"import sys",
"sys.stdout.write(%r)" % text,
"sys.stdout.flush()")
self.assertEqual(stdout, expected)
# test the encoding
check_message(u'15\u20ac', "iso-8859-15", "15\xa4")
check_message(u'15\u20ac', "utf-8", '15\xe2\x82\xac')
check_message(u'15\u20ac', "utf-16-le", '1\x005\x00\xac\x20')
# test the error handler
check_message(u'15\u20ac', "iso-8859-1:ignore", "15")
check_message(u'15\u20ac', "iso-8859-1:replace", "15?")
check_message(u'15\u20ac', "iso-8859-1:backslashreplace", "15\\u20ac")
# test the buffer API
for objtype in ('buffer', 'bytearray'):
stdout = get_message('ascii',
'import sys',
r'sys.stdout.write(%s("\xe9"))' % objtype,
'sys.stdout.flush()')
self.assertEqual(stdout, "\xe9")
def test_main():
run_unittest(
AutoFileTests,
OtherFileTests,
FileSubclassTests,
FileThreadingTests,
StdoutTests
)
if __name__ == '__main__':
test_main()
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