Method expect_success

Lib/test/test_clinic.py:2959–2964

(self, *args)

        return out.getvalue(), err.getvalue(), cm.exception.code

    def expect_success(self, *args):
        out, err, code = self.run_clinic(*args)
        if code != 0:
            self.fail("\n".join([f"Unexpected failure: {args=}", out, err]))
        self.assertEqual(err, "")
        return out

    def expect_failure(self, *args):
        out, err, code = self.run_clinic(*args)