我有一個(gè)返回另一個(gè)函數(shù)的函數(shù)：    const returnedFunction = () => {}    const returnFunction = () => {        const function = returnedFunction();        // Do stuff        return function;    }returnFunction我想測(cè)試從is 類型返回的函數(shù)類型returnedFunction。Jest 似乎在回應(yīng)中接受了它：    expect(received).toBe(expected) // Object.is equality    Expected: "[Function returnedFunction]"    Received: [Function returnedFunction]但我不知道如何匹配它們。