--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/test/test_file.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,546 @@
+import sys
+import os
+import unittest
+import itertools
+import time
+import threading
+from array import array
+from weakref import proxy
+
+from test import test_support
+from test.test_support import TESTFN, findfile, run_unittest
+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.assertEquals(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
+ softspace = f.softspace
+ f.name # merely shouldn't blow up
+ f.mode # ditto
+ f.closed # ditto
+
+ # 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.assertEquals('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.assertEquals(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.assert_(repr(self.f).startswith("<open file '" + TESTFN))
+
+ def testErrors(self):
+ f = self.f
+ self.assertEquals(f.name, TESTFN)
+ self.assert_(not f.isatty())
+ self.assert_(not f.closed)
+
+ self.assertRaises(TypeError, f.readinto, "")
+ f.close()
+ self.assert_(f.closed)
+
+ def testMethods(self):
+ methods = ['fileno', 'flush', 'isatty', 'next', 'read', 'readinto',
+ 'readline', 'readlines', 'seek', 'tell', 'truncate',
+ 'write', 'xreadlines', '__iter__']
+ if sys.platform.startswith('atheos'):
+ methods.remove('truncate')
+
+ # __exit__ should close the file
+ self.f.__exit__(None, None, None)
+ self.assert_(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.writelines, [])
+
+ # 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 testModeStrings(self):
+ # check invalid mode strings
+ for mode in ("", "aU", "wU+"):
+ try:
+ f = open(TESTFN, mode)
+ except ValueError:
+ pass
+ else:
+ f.close()
+ self.fail('%r is an invalid file mode' % mode)
+
+ # Some invalid modes fail on Windows, but pass on Unix
+ # Issue3965: avoid a crash on Windows when filename is unicode
+ for name in (TESTFN, unicode(TESTFN), unicode(TESTFN + '\t')):
+ try:
+ f = open(name, "rr")
+ except IOError:
+ pass
+ else:
+ f.close()
+
+ 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 >>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
+ f = open(unicode(TESTFN), "w")
+ 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 = open(TESTFN, bad_mode)
+ except ValueError, msg:
+ if msg[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[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 testSetBufferSize(self):
+ # make sure that explicitly setting the buffer size doesn't cause
+ # misbehaviour especially with repeated close() calls
+ for s in (-1, 0, 1, 512):
+ try:
+ f = open(TESTFN, 'w', s)
+ f.write(str(s))
+ f.close()
+ f.close()
+ f = open(TESTFN, 'r', s)
+ d = int(f.read())
+ f.close()
+ f.close()
+ except IOError, msg:
+ self.fail('error setting buffer size %d: %s' % (s, str(msg)))
+ self.assertEquals(d, s)
+
+ def testTruncateOnWindows(self):
+ os.unlink(TESTFN)
+
+ def bug801631():
+ # SF bug <http://www.python.org/sf/801631>
+ # "file.truncate fault on windows"
+ f = open(TESTFN, 'wb')
+ f.write('12345678901') # 11 bytes
+ f.close()
+
+ 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)
+
+ 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:
+ 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).
+ 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
+ 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)
+
+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.failUnless(f.subclass_closed)
+
+
+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
+
+ def setUp(self):
+ self.f = None
+ self.filename = TESTFN
+ 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
+
+ def tearDown(self):
+ if self.f:
+ try:
+ self.f.close()
+ except (EnvironmentError, ValueError):
+ pass
+ try:
+ os.remove(self.filename)
+ except EnvironmentError:
+ pass
+
+ def _create_file(self):
+ self.f = open(self.filename, "w+")
+
+ def _close_file(self):
+ with self._count_lock:
+ self.close_count += 1
+ self.f.close()
+ with self._count_lock:
+ self.close_success_count += 1
+
+ def _close_and_reopen_file(self):
+ self._close_file()
+ # if close raises an exception thats fine, self.f remains valid so
+ # we don't need to reopen.
+ 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():
+ self._create_file()
+ funcs = itertools.cycle((
+ lambda: io_func(),
+ lambda: self._close_and_reopen_file(),
+ ))
+ for f in funcs:
+ if not self.do_continue:
+ break
+ try:
+ f()
+ except (IOError, ValueError):
+ pass
+ self._run_workers(worker, nb_workers)
+ 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. - 100.*self.close_success_count/self.close_count
+ print self.close_count, ('%.4f ' % percent),
+
+ def test_close_open(self):
+ def io_func():
+ pass
+ self._test_close_open_io(io_func)
+
+ def test_close_open_flush(self):
+ def io_func():
+ self.f.flush()
+ self._test_close_open_io(io_func)
+
+ def test_close_open_iter(self):
+ def io_func():
+ list(iter(self.f))
+ self._test_close_open_io(io_func)
+
+ def test_close_open_isatty(self):
+ def io_func():
+ self.f.isatty()
+ self._test_close_open_io(io_func)
+
+ def test_close_open_print(self):
+ def io_func():
+ print >> self.f, ''
+ self._test_close_open_io(io_func)
+
+ def test_close_open_read(self):
+ def io_func():
+ self.f.read(0)
+ self._test_close_open_io(io_func)
+
+ def test_close_open_readinto(self):
+ def io_func():
+ a = array('c', 'xxxxx')
+ self.f.readinto(a)
+ self._test_close_open_io(io_func)
+
+ def test_close_open_readline(self):
+ def io_func():
+ self.f.readline()
+ self._test_close_open_io(io_func)
+
+ def test_close_open_readlines(self):
+ def io_func():
+ self.f.readlines()
+ self._test_close_open_io(io_func)
+
+ def test_close_open_seek(self):
+ def io_func():
+ self.f.seek(0, 0)
+ self._test_close_open_io(io_func)
+
+ def test_close_open_tell(self):
+ def io_func():
+ self.f.tell()
+ self._test_close_open_io(io_func)
+
+ def test_close_open_truncate(self):
+ def io_func():
+ self.f.truncate()
+ self._test_close_open_io(io_func)
+
+ def test_close_open_write(self):
+ def io_func():
+ self.f.write('')
+ self._test_close_open_io(io_func)
+
+ def test_close_open_writelines(self):
+ def io_func():
+ self.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_main():
+ # Historically, these tests have been sloppy about removing TESTFN.
+ # So get rid of it no matter what.
+ try:
+ run_unittest(AutoFileTests, OtherFileTests, FileSubclassTests,
+ FileThreadingTests, StdoutTests)
+ finally:
+ if os.path.exists(TESTFN):
+ os.unlink(TESTFN)
+
+if __name__ == '__main__':
+ test_main()