| # Adapted from test_file.py by Daniel Stutzbach |
| |
| import sys |
| import os |
| import io |
| import errno |
| import unittest |
| from array import array |
| from weakref import proxy |
| from functools import wraps |
| import _testcapi |
| |
| from test.support import TESTFN, check_warnings, run_unittest, make_bad_fd |
| from collections import UserList |
| |
| 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(bytes([1, 2])) |
| self.f.close() |
| a = array('b', b'x'*10) |
| self.f = _FileIO(TESTFN, 'r') |
| n = self.f.readinto(a) |
| self.assertEqual(array('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) |
| self.assertRaises(TypeError, self.f.writelines, "abc") |
| |
| 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 test_reject(self): |
| self.assertRaises(TypeError, self.f.write, "Hello!") |
| |
| def testRepr(self): |
| self.assertEqual(repr(self.f), "<_io.FileIO name=%r mode=%r>" |
| % (self.f.name, self.f.mode)) |
| del self.f.name |
| self.assertEqual(repr(self.f), "<_io.FileIO fd=%r mode=%r>" |
| % (self.f.fileno(), self.f.mode)) |
| self.f.close() |
| self.assertEqual(repr(self.f), "<_io.FileIO [closed]>") |
| |
| def testErrors(self): |
| f = self.f |
| self.assertTrue(not f.isatty()) |
| self.assertTrue(not 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.assertTrue(not f.closed) |
| f.close() |
| self.assertTrue(f.closed) |
| |
| def testMethods(self): |
| methods = ['fileno', 'isatty', 'read', 'readinto', |
| 'seek', 'tell', 'truncate', 'write', 'seekable', |
| 'readable', 'writable'] |
| |
| 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) |
| |
| 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(b'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'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() |
| |
| if sys.platform != "win32": |
| 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. |
| pass |
| 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() |
| finally: |
| os.unlink(TESTFN) |
| |
| def testModeStrings(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 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: |
| # Skip test |
| return |
| 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 testConstructorHandlesNULChars(self): |
| fn_with_NUL = 'foo\0bar' |
| self.assertRaises(TypeError, _FileIO, fn_with_NUL, 'w') |
| self.assertRaises(TypeError, _FileIO, bytes(fn_with_NUL, 'ascii'), 'w') |
| |
| 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()) |
| # Issue 15989 |
| 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, io.SEEK_END), 5) |
| f.truncate(15) |
| self.assertEqual(f.tell(), 5) |
| self.assertEqual(f.seek(0, io.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 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() |