Question

我正在使用假肢测试法进行测试,以便单位测试我的方法。其中一个测试项目是,一个州应当把一个接近()的方法点上点击,这反过来又称作浏览器window.close():

const close = () => {
  console.log( close() called )
  window.close()
}

I have a unit test that mocks window.close but the test is not passing: expected "spy" to be called once, but got 0 times

我确信,随着我看到奥塞里的话,该构成部分的“接近”方法被称作“。测试记录中的记录产出。

Here is the test method:

import { test, vi, expect } from "vitest";
import { mount } from "@vue/test-utils";

test( window.close is called when button is clicked , async () => {
  const wrapper = mount(MyComponent, {
    global: {
      plugins: [router]
    }
  })
  const btn = wrapper.find( #exit-button )
  await btn.trigger( click )
  window.close = vi.fn()
  expect(window.close).toHaveBeenCalledOnce()
})

Answer 1

替换<代码>window.close可能不会产生消极的副作用,但一般来说,这种影响会受到抑制。 <>code>spyOn, 宁可采用一些方法,因为它能够恢复原来的实施。

A spy should be set before it is called, it should be:

  vi.spyOn(window,  close )
  const btn = wrapper.find( #exit-button )
  await btn.trigger( click )
  expect(window.close).toHaveBeenCalledOnce()

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