electron/spec-main/extensions-spec.ts

import { expect } from 'chai'
import { session, BrowserWindow, ipcMain } from 'electron'
import { closeAllWindows } from './window-helpers'
import * as http from 'http'
import { AddressInfo } from 'net'
import * as path from 'path'
import { ifdescribe } from './spec-helpers'
import { emittedOnce } from './events-helpers'

const fixtures = path.join(__dirname, 'fixtures')

ifdescribe(process.electronBinding('features').isExtensionsEnabled())('chrome extensions', () => {
  // NB. extensions are only allowed on http://, https:// and ftp:// (!) urls by default.
  let server: http.Server
  let url: string
  before(async () => {
    server = http.createServer((req, res) => res.end())
    await new Promise(resolve => server.listen(0, '127.0.0.1', () => {
      url = `http://127.0.0.1:${(server.address() as AddressInfo).port}`
      resolve()
    }))
  })
  after(() => {
    server.close()
  })

  afterEach(closeAllWindows)
  it('loads an extension', async () => {
    // NB. we have to use a persist: session (i.e. non-OTR) because the
    // extension registry is redirected to the main session. so installing an
    // extension in an in-memory session results in it being installed in the
    // default session.
    const customSession = session.fromPartition(`persist:${require('uuid').v4()}`);
    (customSession as any).loadChromeExtension(path.join(fixtures, 'extensions', 'red-bg'));
    const w = new BrowserWindow({show: false, webPreferences: {session: customSession}})
    await w.loadURL(url);
    const bg = await w.webContents.executeJavaScript('document.documentElement.style.backgroundColor');
    expect(bg).to.equal('red');
  });

  it('confines an extension to the session it was loaded in', async () => {
    const customSession = session.fromPartition(`persist:${require('uuid').v4()}`);
    (customSession as any).loadChromeExtension(path.join(fixtures, 'extensions', 'red-bg'))
    const w = new BrowserWindow({show: false}) // not in the session
    await w.loadURL(url)
    const bg = await w.webContents.executeJavaScript('document.documentElement.style.backgroundColor')
    expect(bg).to.equal('')
  })

  describe('chrome.runtime', () => {
    let content: any
    before(async () => {
      const customSession = session.fromPartition(`persist:${require('uuid').v4()}`);
      (customSession as any).loadChromeExtension(path.join(fixtures, 'extensions', 'chrome-runtime'))
      const w = new BrowserWindow({show: false, webPreferences: { session: customSession }})
      try {
        await w.loadURL(url)
        content = JSON.parse(await w.webContents.executeJavaScript('document.documentElement.textContent'))
        expect(content).to.be.an('object')
      } finally {
        w.destroy()
      }
    })
    it('getManifest()', () => {
      expect(content.manifest).to.be.an('object').with.property('name', 'chrome-runtime')
    })
    it('id', () => {
      expect(content.id).to.be.a('string').with.lengthOf(32)
    })
    it('getURL()', () => {
      expect(content.url).to.be.a('string').and.match(/^chrome-extension:\/\/.*main.js$/)
    })
  })

  describe('chrome.storage', () => {
    it('stores and retrieves a key', async () => {
      const customSession = session.fromPartition(`persist:${require('uuid').v4()}`);
      (customSession as any).loadChromeExtension(path.join(fixtures, 'extensions', 'chrome-storage'))
      const w = new BrowserWindow({show: false, webPreferences: { session: customSession, nodeIntegration: true }})
      try {
        const p = emittedOnce(ipcMain, 'storage-success')
        await w.loadURL(url)
        const [, v] = await p
        expect(v).to.equal('value')
      } finally {
        w.destroy()
      }
    })
  })
})