Nuxt•4d ago

Nuxt3, Vitest, Vuetify3: unable to resolve Vuetify components

Hi everyone! I am having a hard time with a setup based on Nuxt3 + Vuetify3 + Vitest. Nuxt's testing docs implies that using mountSuspended in unit-tests should allow vitest to resolve autoimports, but I get this error for each vuetify component when running tests: [Vue warn]: Failed to resolve component: v-row If this is a native custom element, make sure to exclude it from component resolution via compilerOptions.isCustomElement. at <MountSuspendedComponent > at <MountSuspendedHelper> at <Anonymous ref="VTU_COMPONENT" > at <VTUROOT> If I follow the Vuetify documentation instead, and I provide the Vuetify instance to each test, I get this error which I find very confusing: App already provides property with key "Symbol(vuetify:defaults)". It will be overwritten with the new value. I don't get it: the second error shows that Vuetify components and directives are registered in the test app istance, but the first error seems to proove otherwise. Any suggestions? I hope this is the right place to ask

5 Replies

kapa.ai•4d ago

Hi @nborges. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Based on the information provided in the knowledge sources, I can offer some insights and suggestions for your Nuxt3 + Vuetify3 + Vitest setup issue. The problem you're experiencing seems to be related to the resolution of Vuetify components in your test environment. Here are a few approaches you can try: 1. Stubbing Transition Components: One solution that has worked for a similar issue is to stub out the transition components. As mentioned in a Stack Overflow answer (https://stackoverflow.com/questions/78371735), you can try replacing your mounting code with:

const component = mount(MyComponent, {
  global: {
    plugins: [vuetify],
    stubs: {
      SlideYTransition: {
        template: '<div><slot /></div>'
      }
    }
  },
});

const component = mount(MyComponent, {
  global: {
    plugins: [vuetify],
    stubs: {
      SlideYTransition: {
        template: '<div><slot /></div>'
      }
    }
  },
});

This approach stubs out the slide-y-transition component, which might be causing issues in the test environment. 2. Using mockNuxtImport: For auto-imported components and composables, you can use mockNuxtImport from @nuxt/test-utils/runtime. This allows you to mock Nuxt's auto-import functionality. Here's an example from the Nuxt documentation (https://nuxt.com/docs/getting-started/testing#mocknuxtimport):

import { mockNuxtImport } from '@nuxt/test-utils/runtime'

mockNuxtImport('useStorage', () => {
  return () => {
    return { value: 'mocked storage' }
  }
})

// your tests here

import { mockNuxtImport } from '@nuxt/test-utils/runtime'

mockNuxtImport('useStorage', () => {
  return () => {
    return { value: 'mocked storage' }
  }
})

// your tests here

You might need to use this approach for Vuetify components if they're being auto-imported. 3. Correct Vuetify Import: Make sure you're importing Vuetify correctly in your test files. As mentioned in another Stack Overflow answer (https://stackoverflow.com/questions/77009495), sometimes the issue can be related to importing from the wrong package. For Nuxt 3, you might need to import from @unhead/vue instead of @vueuse/head. 4. Using mountSuspended: As you mentioned, Nuxt documentation suggests using mountSuspended for components that rely on Nuxt composables or auto-imports. Here's an example from the Nuxt documentation (https://nuxt.com/docs/getting-started/testing#mountsuspended):

import { mountSuspended } from '@nuxt/test-utils/runtime'
import { SomeComponent } from '#components'

it('can mount some component', async () => {
    const component = await mountSuspended(SomeComponent)
    expect(component.text()).toMatchInlineSnapshot(
        '"This is an auto-imported component"'
    )
})

import { mountSuspended } from '@nuxt/test-utils/runtime'
import { SomeComponent } from '#components'

it('can mount some component', async () => {
    const component = await mountSuspended(SomeComponent)
    expect(component.text()).toMatchInlineSnapshot(
        '"This is an auto-imported component"'
    )
})

If this approach isn't working, it might be due to how Vuetify components are being registered or imported in your Nuxt setup. 5. Check Vuetify Configuration: Ensure that Vuetify is properly configured in your Nuxt setup. The error message about overwriting the "Symbol(vuetify:defaults)" property suggests that Vuetify might be being initialized multiple times. If none of these approaches solve your issue, you might need to review your overall Nuxt and Vuetify configuration. It's possible that there's a conflict in how Vuetify is being initialized in your main app versus the test environment. Remember, when working with Nuxt, Vuetify, and Vitest together, it's important to ensure that all parts are compatible and properly configured to work in both development and test environments. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4d ago

<@968208466286092359> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

nborgesOP•4d ago

@kapa.ai The solution number 5, although very vague, was ultimately correct. I was using a Nuxt plugin for Vuetify that is now deprecated. I switched over to vuetify-nuxt-module, which seems the stadard now, and the issue disappeared. I am not sure why, though.

kapa.ai•4d ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I'm glad to hear that switching to vuetify-nuxt-module resolved your issue. You're correct that this is now the recommended approach for integrating Vuetify with Nuxt 3. Let me provide some additional context based on the information available in our knowledge sources. The reason why this solution worked is likely related to the proper integration and configuration of Vuetify within the Nuxt 3 ecosystem. The vuetify-nuxt-module is designed specifically for Nuxt 3 and handles the setup and integration of Vuetify more seamlessly. According to a Stack Overflow post (https://stackoverflow.com/questions/77741753), there have been changes in how Vuetify should be installed and configured with Nuxt 3. The post mentions that some older packages are no longer maintained and recommends following the official Vuetify installation instructions for Nuxt 3. The official Vuetify documentation now suggests using their Nuxt module for integration. This module likely handles many aspects of the setup automatically, including: 1. Proper initialization of Vuetify 2. Correct registration of Vuetify components 3. Handling of SSR (Server-Side Rendering) concerns 4. Integration with Nuxt's auto-import system By using this official module, you're ensuring that Vuetify is set up in a way that's compatible with Nuxt 3's architecture and testing environment. This explains why the component resolution issues and warnings disappeared after making this change. For future reference, when working with Nuxt and its ecosystem, it's always a good idea to check the official documentation for the most up-to-date integration methods, as the ecosystem evolves rapidly and older approaches may become deprecated. If you're interested in understanding more about the technical details of why this solved your issue, you might want to look into how the vuetify-nuxt-module handles component registration and SSR, as these are often the areas where integration issues occur in testing environments. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4d ago

<@968208466286092359> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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Nuxt3, Vitest, Vuetify3: unable to resolve Vuetify components