test("syntax error for an unary expression before exponentiation", () => {
expect(`!5 ** 2`).not.toEval();
expect(`~5 ** 2`).not.toEval();
expect(`+5 ** 2`).not.toEval();
expect(`-5 ** 2`).not.toEval();
expect(`typeof 5 ** 2`).not.toEval();
expect(`void 5 ** 2`).not.toEval();
expect(`delete 5 ** 2`).not.toEval();
});