我們來先做一個component，模擬這個情況吧

import * as React from 'react';
import { useOutsideClick } from '../../src';

function OutsideClickSample() {
  const [isOpen, setIsOpen] = React.useState(true);
  const handleOutsideClick = () => {
    setIsOpen(false);
  };
  const ref = useOutsideClick(handleOutsideClick);
  return (
    <section data-testid='outside'>
      <div data-testid='inside' ref={ref}>{isOpen ? "Open" : "Closed"}</div>
    </section>
  )
}

export default OutsideClickSample

接下來我們要模擬

1. 點到section時應該要關掉
2. 點擊div不應該關掉

import React from "react";
import OutsideClickSample from "../example/component/OutsideClickSample"; // 请更正为你的组件路径
import { render, act } from '@testing-library/react';

describe("useOutsideClick", () => {

  it('it should close when clicking outside', () => {
    const { getByTestId, getByText } = render(<OutsideClickSample />);
    const outSideSection = getByTestId("outside");

    expect(getByText('Open')).toBeTruthy();

    act(() => {
      outSideSection.click();
    });

    expect(getByText('Closed')).toBeTruthy();
  });

  it('it should not close when clicking inside', () => {
    const { getByTestId, getByText } = render(<OutsideClickSample />);
    const inSide = getByTestId("inside");

    expect(getByText('Open')).toBeTruthy();

    act(() => {
      inSide.click();
    });

    expect(getByText('Open')).toBeTruthy();
  });

})

首先用render 將OutsideClickSample 模擬出來，使用兩個function，getByTestId與getByText 他們一個可以取得有相同data-testid的dom，一個可以取得相同內容的dom，靠這兩個方法我們就能跟以前一樣測試了