test_posixpath.py 文件源码

def test_ismount_directory_not_readable(self):
        # issue #2466: Simulate ismount run on a directory that is not
        # readable, which used to return False.
        save_lstat = os.lstat
        def fake_lstat(path):
            st_ino = 0
            st_dev = 0
            if path.startswith(ABSTFN) and path != ABSTFN:
                # ismount tries to read something inside the ABSTFN directory;
                # simulate this being forbidden (no read permission).
                raise OSError("Fake [Errno 13] Permission denied")
            if path == ABSTFN:
                st_dev = 1
                st_ino = 1
            return posix.stat_result((0, st_ino, st_dev, 0, 0, 0, 0, 0, 0, 0))
        try:
            os.lstat = fake_lstat
            self.assertIs(posixpath.ismount(ABSTFN), True)
        finally:
            os.lstat = save_lstat