Method test_script_as_dev_fd

Lib/test/test_cmd_line_script.py:795–805

(self)

                     os.stat("/dev").st_dev == os.stat("/dev/fd").st_dev,
                     "Requires fdescfs mounted on /dev/fd on FreeBSD")
    def test_script_as_dev_fd(self):
        # GH-87235: On macOS passing a non-trivial script to /dev/fd/N can cause
        # problems because all open /dev/fd/N file descriptors share the same
        # offset.
        script = 'print("12345678912345678912345")'
        with os_helper.temp_dir() as work_dir:
            script_name = _make_test_script(work_dir, 'script.py', script)
            with open(script_name, "r") as fp:
                p = spawn_python(f"/dev/fd/{fp.fileno()}", close_fds=True, pass_fds=(0,1,2,fp.fileno()))
                out, err = p.communicate()
                self.assertEqual(out, b"12345678912345678912345\n")

    def test_filter_syntax_warnings_by_module(self):
        filename = support.findfile('test_import/data/syntax_warnings.py')