indexedDB测试Jeste酶-TypeError：无法读取未定义的属性“ open”

Question

复制工作正常，但是当我测试时它崩溃了。

这是代码的错误，哪里出了问题。.我想

componentDidMount = async() => {
    try{
      const request = await window.indexedDB.open("QuestionData",1)

      request.onsuccess = (event) => {
        const db = request.result;
        const transaction = db.transaction('Questions' , "readwrite");
        const store = transaction.objectStore('Questions');
  
        const get = store.get(1)
        get.onsuccess = () =>{ 
          this.setState({
            data: get.result.data
          })
        }
      }

    }catch(err){console.log(err)}
  }

这是考验的内容

test('should render btn', () => {
  const wrapper = mount(<App />)
  const btn = wrapper.find('.btn')
  expect(btn.length).toBe(1)
})

现在出错！

  

console.log src / App.js：36   TypeError：无法读取未定义的属性“ open”