Method test_open_dir_fd

Lib/test/test_posix.py:1740–1750

(self)

    @unittest.skipUnless(os.open in os.supports_dir_fd, "test needs dir_fd support in os.open()")
    def test_open_dir_fd(self):
        with self.prepare() as (dir_fd, name, fullname):
            with open(fullname, 'wb') as outfile:
                outfile.write(b"testline\n")
            self.addCleanup(posix.unlink, fullname)
            fd = posix.open(name, posix.O_RDONLY, dir_fd=dir_fd)
            try:
                res = posix.read(fd, 9)
                self.assertEqual(b"testline\n", res)
            finally:
                posix.close(fd)

    @unittest.skipUnless(hasattr(os, 'readlink') and (os.readlink in os.supports_dir_fd),
                         "test needs dir_fd support in os.readlink()")