mount()

• 参数：

  • {Component} component
  • {Object} options

• 返回值： {Wrapper}

• 选项：

移步选项

• 用法：

创建一个包含被挂载和渲染的 Vue 组件的 Wrapper。

Without options:

import { mount } from '@vue/test-utils'
import Foo from './Foo.vue'

describe('Foo', () => {
  it('renders a div', () => {
    const wrapper = mount(Foo)
    expect(wrapper.contains('div')).toBe(true)
  })
})

使用 Vue 选项：

import { mount } from '@vue/test-utils'
import Foo from './Foo.vue'

describe('Foo', () => {
  it('renders a div', () => {
    const wrapper = mount(Foo, {
      propsData: {
        color: 'red'
      }
    })
    expect(wrapper.props().color).toBe('red')
  })
})

固定在 DOM 上：

import { mount } from '@vue/test-utils'
import Foo from './Foo.vue'

describe('Foo', () => {
  it('renders a div', () => {
    const div = document.createElement('div')
    document.body.appendChild(div)
    const wrapper = mount(Foo, {
      attachTo: div
    })
    expect(wrapper.contains('div')).toBe(true)
    wrapper.destroy()
  })
})

默认插槽和具名插槽：

import { mount } from '@vue/test-utils'
import Foo from './Foo.vue'
import Bar from './Bar.vue'
import FooBar from './FooBar.vue'

describe('Foo', () => {
  it('renders a div', () => {
    const wrapper = mount(Foo, {
      slots: {
        default: [Bar, FooBar],
        fooBar: FooBar, // 将匹配 `<slot name="FooBar" />`。
        foo: '<div />'
      }
    })
    expect(wrapper.contains('div')).toBe(true)
  })
})

将全局属性存根：

import { mount } from '@vue/test-utils'
import Foo from './Foo.vue'

describe('Foo', () => {
  it('renders a div', () => {
    const $route = { path: 'http://www.example-path.com' }
    const wrapper = mount(Foo, {
      mocks: {
        $route
      }
    })
    expect(wrapper.vm.$route.path).toBe($route.path)
  })
})

将组件存根：

import { mount } from '@vue/test-utils'
import Foo from './Foo.vue'
import Bar from './Bar.vue'
import Faz from './Faz.vue'

describe('Foo', () => {
  it('renders a div', () => {
    const wrapper = mount(Foo, {
      stubs: {
        BarFoo: true,
        FooBar: Faz,
        Bar: { template: '<div class="stubbed" />' }
      }
    })
    expect(wrapper.contains('.stubbed')).toBe(true)
    expect(wrapper.contains(Bar)).toBe(true)
  })
})

废弃通知：

当对组件存根时，提供一个字符串的方式 (ComponentToStub: '<div class="stubbed" />) 已经不再被支持。

• 延伸阅读：Wrapper