Method test_stderr_None

Lib/test/test_faulthandler.py:839–850

(self)

            sys.stderr = stderr

    def test_stderr_None(self):
        # Issue #21497: provide a helpful error if sys.stderr is None,
        # instead of just an attribute error: "None has no attribute fileno".
        with self.check_stderr_none():
            faulthandler.enable()
        with self.check_stderr_none():
            faulthandler.dump_traceback()
        with self.check_stderr_none():
            faulthandler.dump_traceback_later(1e-3)
        if hasattr(faulthandler, "register"):
            with self.check_stderr_none():
                faulthandler.register(signal.SIGUSR1)

    @unittest.skipUnless(MS_WINDOWS, 'specific to Windows')
    def test_raise_exception(self):