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vitest-playwright-bridge

Bridge to interact with Playwright directly from Vitest browser tests, enabling advanced browser control and access to Playwright features. It provides utilities like pageHandle, which allow direct interaction with the Playwright Page object.

Example

test/media.test.ts for CSS media emulation:

import { describe, test, expect } from 'vitest'
import { pageHandle } from 'vitest-playwright-bridge/browser'

describe('CSS media emulation', () => {
  test.afterEach(async () => {
    await pageHandle.evaluate(async (page) => {
      await page.emulateMedia({
        colorScheme: null,
        contrast: null,
        forcedColors: null,
        media: null,
        reducedMotion: null,
      })
    })
  })

  test('should set dark mode', async () => {
    expect(window.matchMedia('(prefers-color-scheme: dark)').matches).toBe(false)

    await pageHandle.evaluate(async (page) => {
      await page.emulateMedia({ colorScheme: 'dark' })
    })

    expect(window.matchMedia('(prefers-color-scheme: dark)').matches).toBe(true)
  })
})

Configuration

vitest.config.ts example:

import { defineConfig } from 'vitest/config'
import { playwright } from '@vitest/browser-playwright'
import { playwrightBridge } from 'vitest-playwright-bridge/plugin'

export default defineConfig({
  plugins: [playwrightBridge()],
  test: {
    browser: {
      provider: playwright(),
      enabled: true,
      instances: [
        { browser: 'chromium' },
      ],
    },
  },
})

API

import { pageHandle, contextHandle, route, unroute, unrouteAll, bypassFetch } from 'vitest-playwright-bridge/browser'

HostHandle

HostHandle is similar to JSHandle in Playwright.

Just like we pass functions from Node to browsers via JSHandle.evaluate in Playwright, we can pass functions from browsers to Node via HostHandle.evaluate in this bridge.

The bridge provides two initial HostHandle instances:

• pageHandle: represents the current Playwright Page object.
• contextHandle: represents the current Playwright BrowserContext object.

Network Routing

To support fast, flexible network request matching and routing, the bridge provides direct browser equivalents for Playwright's Page.route.

• route(url, handler): adds a route to match network requests.
• unroute(url, handler?): removes a specific route or all routes matching the URL.
• unrouteAll(): removes all routes.

import { describe, test, expect } from 'vitest'
import { route, unrouteAll } from 'vitest-playwright-bridge/browser'

describe('network request routing', () => {
  test.afterEach(async () => {
    await unrouteAll({ behavior: 'wait' })
  })

  test('should reply with Hello World', async () => {
    await route('/hello', async (route) => {
      await route.fulfill({ body: 'Hello World' })
    })

    const response = await fetch('/hello')
    const text = await response.text()
    expect(text).toBe('Hello World')
  })
})

License

MIT