# 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 from test.support import TESTFN, check_warnings, run_unittest, make_bad_fd 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 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") #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 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()) 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 # "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 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()