Mounting Options

Options for mount and shallowMount. The options object can contain both Vue Test Utils mounting options and other options.

context

  • type: Object

Passes context to functional component. Can only be used with functional components.

Example:

import Foo from './Foo.vue'
import Bar from './Bar.vue'

const wrapper = mount(Component, {
  context: {
    props: { show: true },
    children: [Foo, Bar]
  }
})

expect(wrapper.is(Component)).toBe(true)

slots

  • type: { [name: string]: Array<Component>|Component|string }

Provide an object of slot contents to the component. The key corresponds to the slot name. The value can be either a component, an array of components, or a template string, or text.

Example:

import Foo from './Foo.vue'
import Bar from './Bar.vue'

const wrapper = shallowMount(Component, {
  slots: {
    default: [Foo, Bar],
    fooBar: Foo, // Will match `<slot name="FooBar" />`.
    foo: '<div />',
    bar: 'bar'
  }
})
expect(wrapper.find('div')).toBe(true)

scopedSlots

  • type: { [name: string]: string }

Provide an object of scoped slots contents to the component. The key corresponds to the slot name. The value can be a template string.

There are three limitations.

  • This option is only supported in vue@2.5+.

  • You can not use <template> tag as the root element in the scopedSlots option.

  • This does not support PhantomJS.
    You can use Puppeteer as an alternative.

Example:

const wrapper = shallowMount(Component, {
  scopedSlots: {
    foo: '<p slot-scope="props">{{props.index}},{{props.text}}</p>'
  }
})
expect(wrapper.find('#fooWrapper').html()).toBe(
  `<div id="fooWrapper"><p>0,text1</p><p>1,text2</p><p>2,text3</p></div>`
)

stubs

  • type: { [name: string]: Component | boolean } | Array<string>

Stubs child components. Can be an Array of component names to stub, or an object. If stubs is an Array, every stub is <${component name}-stub>.

Example:

import Foo from './Foo.vue'

mount(Component, {
  stubs: ['registered-component']
})

shallowMount(Component, {
  stubs: {
    // stub with a specific implementation
    'registered-component': Foo,
    // create default stub.
    // the component name of default stub is another-component in this case.
    // the default stub is <${the component name of default stub}-stub>.
    'another-component': true
  }
})

mocks

  • type: Object

Add additional properties to the instance. Useful for mocking global injections.

Example:

const $route = { path: 'http://www.example-path.com' }
const wrapper = shallowMount(Component, {
  mocks: {
    $route
  }
})
expect(wrapper.vm.$route.path).toBe($route.path)

localVue

  • type: Vue

A local copy of Vue created by createLocalVue to use when mounting the component. Installing plugins on this copy of Vue prevents polluting the original Vue copy.

Example:

import { createLocalVue, mount } from '@vue/test-utils'
import VueRouter from 'vue-router'
import Foo from './Foo.vue'

const localVue = createLocalVue()
localVue.use(VueRouter)

const routes = [
  { path: '/foo', component: Foo }
]

const router = new VueRouter({
  routes
})

const wrapper = mount(Component, {
  localVue,
  router
})
expect(wrapper.vm.$route).toBeInstanceOf(Object)

attachToDocument

  • type: boolean
  • default: false

Component will be attached to DOM when rendered if set to true.

attrs

  • type: Object

Set the component instance's $attrs object.

listeners

  • type: Object

Set the component instance's $listeners object.

provide

  • type: Object

Pass properties for components to use in injection. See provide/inject.

sync

  • type: boolean
  • default: true

When sync is true, the Vue component is rendered synchronously.
When sync is false, the Vue component is rendered asynchronously.

Other options

When the options for mount and shallowMount contain the options other than the mounting options, the component options are overwritten with those using extends.

const Component = {
  template: '<div>{{ foo() }}{{ bar() }}{{ baz() }}</div>',
  methods: {
    foo () {
      return 'a'
    },
    bar () {
      return 'b'
    }
  }
}
const options = {
  methods: {
    bar () {
      return 'B'
    },
    baz () {
      return 'C'
    }
  }
}
const wrapper = mount(Component, options)
expect(wrapper.text()).toBe('aBC')