开玩笑TypeError：无法读取未定义的属性'getApp'

Question

我想使用笑话来测试我的代码，但是我使用window.getApp。$ emit。反正有测试这个案子吗？

已经使用： const spy = jest.spyOn（wrapper.vm，'$ emit'）

和 const glowSpy = jest.fn（）; global.getApp。$ emit = glowSpy;

我的代码如下：

successUnpackPackage (item) {
      this.loading = false
      window.getApp.$emit('SHOW_NOTIFICATION', `Package ${item.id} has been unpacked`, 'green')
      this.searchPackages()
    }

使用笑话的单元测试：

test('successUnpackPackage', () => {
    const router = new VueRouter({
      mode: 'history',
      routes: [
        {
          path: '/management/package',
          meta: { breadcrumb: true },
          name: 'management/package',
          component: Component
        }
      ]
    })

    const wrapper = shallowMount(Component, {
      store,
      localVue,
      router
    })

    var item = {
      id: 'id'
    }

    wrapper.vm.loading = true
    const spy = jest.spyOn(wrapper.window.getApp, '$emit')
    wrapper.vm.successUnpackPackage(item)
    expect(wrapper.vm.loading).toBe(false)
    expect(spy).toHaveBeenCalledTimes(1)
    spy.mockRestore()
  })

TypeError：无法读取未定义的属性'getApp'

  411 |
  412 |     wrapper.vm.loading = true
> 413 |     const spy = jest.spyOn(wrapper.window.getApp, '$emit')
  414 |     wrapper.vm.successUnpackPackage(item)
  415 |     expect(wrapper.vm.loading).toBe(false)
  416 |     expect(spy).toHaveBeenCalledTimes(1)

  at Object.getApp (test/unit/specs/views/management/PackageManagement.spec.js:413:43)