Vue-Test-Utils Unknown custom element: <router-link>

With Vue 3 and Vue Test Utils Next (v4), it seems you just have to add your router (the return object from createRouter) as a plugin to your mountOptions:

import router from "@/router";

const mountOptions = {
  global: {
    plugins: [router],
  },
};

https://next.vue-test-utils.vuejs.org/api/#global

Or a more full example:

import router from "@/router";
import Button from "@/components/Button.vue";

const mountOptions = {
  global: {
    mocks: {
      $route: "home",
      $router: {
        push: jest.fn(),
      },
    },
    plugins: [router],
  },
};


it("Renders", () => {
  const wrapper = shallowMount(Button, mountOptions);
  expect(wrapper.get("nav").getComponent({ name: "router-link" })).toExist();
});

Note, in the example above I'm using a project setup with Vue CLI.

Add the router-link stub to the shallow (or shallowMount) method options like this:

const wrapper = shallow(TempComponent, {
     propsData: { temp },
     stubs: ['router-link']
})

or this way:

import { RouterLinkStub } from '@vue/test-utils';

const wrapper = shallow(TempComponent, {
     propsData: { temp },
     stubs: {
         RouterLink: RouterLinkStub
     }
})

The error should go away after you do this.

Worked for me:

[ Package.json ] file

...
"vue-jest": "^3.0.5",
"vue-router": "~3.1.5",
"vue": "~2.6.11",
"@vue/test-utils": "1.0.0-beta.29",
...

[ Test ] file

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

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

const router = new VueRouter({
  routes: [
    {
      name: 'dashboard',
      path: '/dashboard'
    }
  ]
});

describe('Successful test', ()=>{
  it('works', ()=>{    
    let wrapper = mount(App, {
      localVue,
      router
    });

    // Here is your assertion
  });
});

Or you can try this: