Nuxt•4w ago

How to test middleware

Is there a way outside of testing for location headers to test middleware? I'd like to just test this small piece of middleware directly

export default defineNuxtRouteMiddleware(async (to) => {
    if (unauthorizedPaths.includes(to.path))
        return;

    const merchantStore = useMerchantStore();
    if (merchantStore.currentMerchant)
        return;

    return navigateTo('/welcome');
});

export default defineNuxtRouteMiddleware(async (to) => {
    if (unauthorizedPaths.includes(to.path))
        return;

    const merchantStore = useMerchantStore();
    if (merchantStore.currentMerchant)
        return;

    return navigateTo('/welcome');
});

2 Replies

kapa.ai•4w ago

Hi @ægteemil. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To test middleware in Nuxt, you can use the @nuxt/test-utils package, which provides utilities for unit testing Nuxt applications, including middleware. Here's how you can approach testing your middleware: 1. First, ensure you have the necessary testing dependencies installed. As mentioned in the Nuxt testing documentation (https://nuxt.com/docs/getting-started/testing#installation), you'll need to install @nuxt/test-utils, vitest, @vue/test-utils, and happy-dom. 2. Set up your testing environment by creating a vitest.config.ts file as described in the Nuxt testing documentation (https://nuxt.com/docs/getting-started/testing#unit-testing):

import { defineVitestConfig } from '@nuxt/test-utils/config'

export default defineVitestConfig({
  // any custom Vitest config you require
})

import { defineVitestConfig } from '@nuxt/test-utils/config'

export default defineVitestConfig({
  // any custom Vitest config you require
})

3. To test your middleware, you can create a test file (e.g., middleware.test.ts) and use the Nuxt testing environment. Here's an example of how you might structure your test:

// @vitest-environment nuxt
import { describe, it, expect, vi } from 'vitest'
import { navigateTo } from 'nuxt/app'
import middleware from './your-middleware-file'
import { useMerchantStore } from './your-store-file'

vi.mock('nuxt/app', () => ({
  navigateTo: vi.fn(),
}))

vi.mock('./your-store-file', () => ({
  useMerchantStore: vi.fn(),
}))

describe('Middleware', () => {
  it('should allow access to unauthorized paths', async () => {
    const to = { path: '/unauthorized-path' }
    const result = await middleware(to)
    expect(result).toBeUndefined()
  })

  it('should redirect to welcome page if no current merchant', async () => {
    const to = { path: '/some-path' }
    vi.mocked(useMerchantStore).mockReturnValue({ currentMerchant: null })
    await middleware(to)
    expect(navigateTo).toHaveBeenCalledWith('/welcome')
  })
it('should allow access if current merchant exists', async () => {
    const to = { path: '/some-path' }
    vi.mocked(useMerchantStore).mockReturnValue({ currentMerchant: {} })
    const result = await middleware(to)
    expect(result).toBeUndefined()
  })
})

// @vitest-environment nuxt
import { describe, it, expect, vi } from 'vitest'
import { navigateTo } from 'nuxt/app'
import middleware from './your-middleware-file'
import { useMerchantStore } from './your-store-file'

vi.mock('nuxt/app', () => ({
  navigateTo: vi.fn(),
}))

vi.mock('./your-store-file', () => ({
  useMerchantStore: vi.fn(),
}))

describe('Middleware', () => {
  it('should allow access to unauthorized paths', async () => {
    const to = { path: '/unauthorized-path' }
    const result = await middleware(to)
    expect(result).toBeUndefined()
  })

  it('should redirect to welcome page if no current merchant', async () => {
    const to = { path: '/some-path' }
    vi.mocked(useMerchantStore).mockReturnValue({ currentMerchant: null })
    await middleware(to)
    expect(navigateTo).toHaveBeenCalledWith('/welcome')
  })
it('should allow access if current merchant exists', async () => {
    const to = { path: '/some-path' }
    vi.mocked(useMerchantStore).mockReturnValue({ currentMerchant: {} })
    const result = await middleware(to)
    expect(result).toBeUndefined()
  })
})

This test suite covers the main scenarios of your middleware: - Allowing access to unauthorized paths - Redirecting to the welcome page when there's no current merchant - Allowing access when a current merchant exists By using the Nuxt testing environment and mocking the necessary dependencies (like navigateTo and useMerchantStore), you can test the middleware logic directly without relying on checking location headers. Remember to adjust the import paths and mock implementations according to your project structure and actual implementations. For more detailed information on Nuxt testing, refer to the Nuxt testing documentation (https://nuxt.com/docs/getting-started/testing). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

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How to test middleware