const chai = require('chai')
const dirtyChai = require('dirty-chai')
const fs = require('fs')
const http = require('http')
const path = require('path')
const ws = require('ws')
const url = require('url')
const ChildProcess = require('child_process')
const { ipcRenderer, remote } = require('electron')
const { emittedOnce } = require('./events-helpers')
const { closeWindow, waitForWebContentsToLoad } = require('./window-helpers')
const { resolveGetters } = require('./expect-helpers')
const { app, BrowserWindow, ipcMain, protocol, session, webContents } = remote
const features = process.electronBinding('features')

const { expect } = chai
chai.use(dirtyChai)

/* Most of the APIs here don't use standard callbacks */
/* eslint-disable standard/no-callback-literal */

describe('chromium feature', () => {
  const fixtures = path.resolve(__dirname, 'fixtures')
  let listener = null
  let w = null

  afterEach(() => {
    if (listener != null) {
      window.removeEventListener('message', listener)
    }
    listener = null
  })

  afterEach(async () => {
    await closeWindow(w)
    w = null
  })

  describe('heap snapshot', () => {
    it('does not crash', function () {
      process.electronBinding('v8_util').takeHeapSnapshot()
    })
  })

  describe('navigator.webkitGetUserMedia', () => {
    it('calls its callbacks', (done) => {
      navigator.webkitGetUserMedia({
        audio: true,
        video: false
      }, () => done(),
      () => done())
    })
  })

  describe('navigator.language', () => {
    it('should not be empty', () => {
      expect(navigator.language).to.not.equal('')
    })
  })

  describe('navigator.geolocation', () => {
    before(function () {
      if (!features.isFakeLocationProviderEnabled()) {
        return this.skip()
      }
    })

    it('returns position when permission is granted', (done) => {
      navigator.geolocation.getCurrentPosition((position) => {
        expect(position).to.have.a.property('coords')
        expect(position).to.have.a.property('timestamp')
        done()
      }, (error) => {
        done(error)
      })
    })
  })

  describe('window.open', () => {
    it('returns a BrowserWindowProxy object', () => {
      const b = window.open('about:blank', '', 'show=no')
      expect(b.closed).to.be.false()
      expect(b.constructor.name).to.equal('BrowserWindowProxy')
      b.close()
    })

    it('accepts "nodeIntegration" as feature', (done) => {
      let b = null
      listener = (event) => {
        expect(event.data.isProcessGlobalUndefined).to.be.true()
        b.close()
        done()
      }
      window.addEventListener('message', listener)
      b = window.open(`file://${fixtures}/pages/window-opener-node.html`, '', 'nodeIntegration=no,show=no')
    })

    it('inherit options of parent window', (done) => {
      let b = null
      listener = (event) => {
        const width = outerWidth
        const height = outerHeight
        expect(event.data).to.equal(`size: ${width} ${height}`)
        b.close()
        done()
      }
      window.addEventListener('message', listener)
      b = window.open(`file://${fixtures}/pages/window-open-size.html`, '', 'show=no')
    })

    it('disables node integration when it is disabled on the parent window', (done) => {
      let b = null
      listener = (event) => {
        expect(event.data.isProcessGlobalUndefined).to.be.true()
        b.close()
        done()
      }
      window.addEventListener('message', listener)

      const windowUrl = require('url').format({
        pathname: `${fixtures}/pages/window-opener-no-node-integration.html`,
        protocol: 'file',
        query: {
          p: `${fixtures}/pages/window-opener-node.html`
        },
        slashes: true
      })
      b = window.open(windowUrl, '', 'nodeIntegration=no,show=no')
    })

    it('disables the <webview> tag when it is disabled on the parent window', (done) => {
      let b = null
      listener = (event) => {
        expect(event.data.isWebViewGlobalUndefined).to.be.true()
        b.close()
        done()
      }
      window.addEventListener('message', listener)

      const windowUrl = require('url').format({
        pathname: `${fixtures}/pages/window-opener-no-webview-tag.html`,
        protocol: 'file',
        query: {
          p: `${fixtures}/pages/window-opener-webview.html`
        },
        slashes: true
      })
      b = window.open(windowUrl, '', 'webviewTag=no,nodeIntegration=yes,show=no')
    })

    it('does not override child options', (done) => {
      let b = null
      const size = {
        width: 350,
        height: 450
      }
      listener = (event) => {
        expect(event.data).to.equal(`size: ${size.width} ${size.height}`)
        b.close()
        done()
      }
      window.addEventListener('message', listener)
      b = window.open(`file://${fixtures}/pages/window-open-size.html`, '', 'show=no,width=' + size.width + ',height=' + size.height)
    })

    it('throws an exception when the arguments cannot be converted to strings', () => {
      expect(() => {
        window.open('', { toString: null })
      }).to.throw('Cannot convert object to primitive value')

      expect(() => {
        window.open('', '', { toString: 3 })
      }).to.throw('Cannot convert object to primitive value')
    })

    it('does not throw an exception when the features include webPreferences', () => {
      let b = null
      expect(() => {
        b = window.open('', '', 'webPreferences=')
      }).to.not.throw()
      b.close()
    })
  })

  describe('window.opener', () => {
    it('is not null for window opened by window.open', (done) => {
      let b = null
      listener = (event) => {
        expect(event.data).to.equal('object')
        b.close()
        done()
      }
      window.addEventListener('message', listener)
      b = window.open(`file://${fixtures}/pages/window-opener.html`, '', 'show=no')
    })
  })

  describe('window.opener access from <webview>', () => {
    const scheme = 'other'
    const srcPath = `${fixtures}/pages/webview-opener-postMessage.html`
    const pageURL = `file://${fixtures}/pages/window-opener-location.html`
    let webview = null

    before((done) => {
      protocol.registerFileProtocol(scheme, (request, callback) => {
        callback(srcPath)
      }, (error) => done(error))
    })

    after(() => {
      protocol.unregisterProtocol(scheme)
    })

    afterEach(() => {
      if (webview != null) webview.remove()
    })

    it('fails when origin of webview src URL does not match opener', (done) => {
      webview = new WebView()
      webview.addEventListener('console-message', (e) => {
        expect(e.message).to.equal('null')
        done()
      })
      webview.setAttribute('allowpopups', 'on')
      webview.src = url.format({
        pathname: srcPath,
        protocol: scheme,
        query: {
          p: pageURL
        },
        slashes: true
      })
      document.body.appendChild(webview)
    })

    it('works when origin matches', (done) => {
      webview = new WebView()
      webview.addEventListener('console-message', (e) => {
        expect(e.message).to.equal(webview.src)
        done()
      })
      webview.setAttribute('allowpopups', 'on')
      webview.src = url.format({
        pathname: srcPath,
        protocol: 'file',
        query: {
          p: pageURL
        },
        slashes: true
      })
      document.body.appendChild(webview)
    })

    it('works when origin does not match opener but has node integration', (done) => {
      webview = new WebView()
      webview.addEventListener('console-message', (e) => {
        webview.remove()
        expect(e.message).to.equal(webview.src)
        done()
      })
      webview.setAttribute('allowpopups', 'on')
      webview.setAttribute('nodeintegration', 'on')
      webview.src = url.format({
        pathname: srcPath,
        protocol: scheme,
        query: {
          p: pageURL
        },
        slashes: true
      })
      document.body.appendChild(webview)
    })
  })

  describe('window.postMessage', () => {
    it('throws an exception when the targetOrigin cannot be converted to a string', () => {
      const b = window.open('')
      expect(() => {
        b.postMessage('test', { toString: null })
      }).to.throw('Cannot convert object to primitive value')
      b.close()
    })
  })

  describe('window.opener.postMessage', () => {
    it('sets source and origin correctly', (done) => {
      let b = null
      listener = (event) => {
        window.removeEventListener('message', listener)
        b.close()
        expect(event.source).to.equal(b)
        expect(event.origin).to.equal('file://')
        done()
      }
      window.addEventListener('message', listener)
      b = window.open(`file://${fixtures}/pages/window-opener-postMessage.html`, '', 'show=no')
    })

    it('supports windows opened from a <webview>', (done) => {
      const webview = new WebView()
      webview.addEventListener('console-message', (e) => {
        webview.remove()
        expect(e.message).to.equal('message')
        done()
      })
      webview.allowpopups = true
      webview.src = url.format({
        pathname: `${fixtures}/pages/webview-opener-postMessage.html`,
        protocol: 'file',
        query: {
          p: `${fixtures}/pages/window-opener-postMessage.html`
        },
        slashes: true
      })
      document.body.appendChild(webview)
    })

    describe('targetOrigin argument', () => {
      let serverURL
      let server

      beforeEach((done) => {
        server = http.createServer((req, res) => {
          res.writeHead(200)
          const filePath = path.join(fixtures, 'pages', 'window-opener-targetOrigin.html')
          res.end(fs.readFileSync(filePath, 'utf8'))
        })
        server.listen(0, '127.0.0.1', () => {
          serverURL = `http://127.0.0.1:${server.address().port}`
          done()
        })
      })

      afterEach(() => {
        server.close()
      })

      it('delivers messages that match the origin', (done) => {
        let b = null
        listener = (event) => {
          window.removeEventListener('message', listener)
          b.close()
          expect(event.data).to.equal('deliver')
          done()
        }
        window.addEventListener('message', listener)
        b = window.open(serverURL, '', 'show=no')
      })
    })
  })

  describe('webgl', () => {
    before(function () {
      if (process.platform === 'win32') {
        this.skip()
      }
    })

    it('can be get as context in canvas', () => {
      if (process.platform === 'linux') {
        // FIXME(alexeykuzmin): Skip the test.
        // this.skip()
        return
      }

      const webgl = document.createElement('canvas').getContext('webgl')
      expect(webgl).to.not.be.null()
    })
  })

  describe('web workers', () => {
    it('Worker can work', (done) => {
      const worker = new Worker('../fixtures/workers/worker.js')
      const message = 'ping'
      worker.onmessage = (event) => {
        expect(event.data).to.equal(message)
        worker.terminate()
        done()
      }
      worker.postMessage(message)
    })

    it('Worker has no node integration by default', (done) => {
      const worker = new Worker('../fixtures/workers/worker_node.js')
      worker.onmessage = (event) => {
        expect(event.data).to.equal('undefined undefined undefined undefined')
        worker.terminate()
        done()
      }
    })

    it('Worker has node integration with nodeIntegrationInWorker', (done) => {
      const webview = new WebView()
      webview.addEventListener('ipc-message', (e) => {
        expect(e.channel).to.equal('object function object function')
        webview.remove()
        done()
      })
      webview.src = `file://${fixtures}/pages/worker.html`
      webview.setAttribute('webpreferences', 'nodeIntegration, nodeIntegrationInWorker')
      document.body.appendChild(webview)
    })

    // FIXME: disabled during chromium update due to crash in content::WorkerScriptFetchInitiator::CreateScriptLoaderOnIO
    xdescribe('SharedWorker', () => {
      it('can work', (done) => {
        const worker = new SharedWorker('../fixtures/workers/shared_worker.js')
        const message = 'ping'
        worker.port.onmessage = (event) => {
          expect(event.data).to.equal(message)
          done()
        }
        worker.port.postMessage(message)
      })

      it('has no node integration by default', (done) => {
        const worker = new SharedWorker('../fixtures/workers/shared_worker_node.js')
        worker.port.onmessage = (event) => {
          expect(event.data).to.equal('undefined undefined undefined undefined')
          done()
        }
      })

      it('has node integration with nodeIntegrationInWorker', (done) => {
        const webview = new WebView()
        webview.addEventListener('console-message', (e) => {
          console.log(e)
        })
        webview.addEventListener('ipc-message', (e) => {
          expect(e.channel).to.equal('object function object function')
          webview.remove()
          done()
        })
        webview.src = `file://${fixtures}/pages/shared_worker.html`
        webview.setAttribute('webpreferences', 'nodeIntegration, nodeIntegrationInWorker')
        document.body.appendChild(webview)
      })
    })
  })

  describe('iframe', () => {
    let iframe = null

    beforeEach(() => {
      iframe = document.createElement('iframe')
    })

    afterEach(() => {
      document.body.removeChild(iframe)
    })

    it('does not have node integration', (done) => {
      iframe.src = `file://${fixtures}/pages/set-global.html`
      document.body.appendChild(iframe)
      iframe.onload = () => {
        expect(iframe.contentWindow.test).to.equal('undefined undefined undefined')
        done()
      }
    })
  })

  describe('storage', () => {
    describe('DOM storage quota override', () => {
      ['localStorage', 'sessionStorage'].forEach((storageName) => {
        it(`allows saving at least 50MiB in ${storageName}`, () => {
          const storage = window[storageName]
          const testKeyName = '_electronDOMStorageQuotaOverrideTest'
          // 25 * 2^20 UTF-16 characters will require 50MiB
          const arraySize = 25 * Math.pow(2, 20)
          storage[testKeyName] = new Array(arraySize).fill('X').join('')
          expect(storage[testKeyName]).to.have.lengthOf(arraySize)
          delete storage[testKeyName]
        })
      })
    })

    it('requesting persitent quota works', (done) => {
      navigator.webkitPersistentStorage.requestQuota(1024 * 1024, (grantedBytes) => {
        expect(grantedBytes).to.equal(1048576)
        done()
      })
    })

    describe('custom non standard schemes', () => {
      const protocolName = 'storage'
      let contents = null
      before((done) => {
        const handler = (request, callback) => {
          const parsedUrl = url.parse(request.url)
          let filename
          switch (parsedUrl.pathname) {
            case '/localStorage' : filename = 'local_storage.html'; break
            case '/sessionStorage' : filename = 'session_storage.html'; break
            case '/WebSQL' : filename = 'web_sql.html'; break
            case '/indexedDB' : filename = 'indexed_db.html'; break
            case '/cookie' : filename = 'cookie.html'; break
            default : filename = ''
          }
          callback({ path: `${fixtures}/pages/storage/${filename}` })
        }
        protocol.registerFileProtocol(protocolName, handler, (error) => done(error))
      })

      after((done) => {
        protocol.unregisterProtocol(protocolName, () => done())
      })

      beforeEach(() => {
        contents = webContents.create({
          nodeIntegration: true
        })
      })

      afterEach(() => {
        contents.destroy()
        contents = null
      })

      it('cannot access localStorage', (done) => {
        ipcMain.once('local-storage-response', (event, error) => {
          expect(error).to.equal(`Failed to read the 'localStorage' property from 'Window': Access is denied for this document.`)
          done()
        })
        contents.loadURL(protocolName + '://host/localStorage')
      })

      it('cannot access sessionStorage', (done) => {
        ipcMain.once('session-storage-response', (event, error) => {
          expect(error).to.equal(`Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document.`)
          done()
        })
        contents.loadURL(`${protocolName}://host/sessionStorage`)
      })

      it('cannot access WebSQL database', (done) => {
        ipcMain.once('web-sql-response', (event, error) => {
          expect(error).to.equal(`Failed to execute 'openDatabase' on 'Window': Access to the WebDatabase API is denied in this context.`)
          done()
        })
        contents.loadURL(`${protocolName}://host/WebSQL`)
      })

      it('cannot access indexedDB', (done) => {
        ipcMain.once('indexed-db-response', (event, error) => {
          expect(error).to.equal(`Failed to execute 'open' on 'IDBFactory': access to the Indexed Database API is denied in this context.`)
          done()
        })
        contents.loadURL(`${protocolName}://host/indexedDB`)
      })

      it('cannot access cookie', (done) => {
        ipcMain.once('cookie-response', (event, error) => {
          expect(error).to.equal(`Failed to set the 'cookie' property on 'Document': Access is denied for this document.`)
          done()
        })
        contents.loadURL(`${protocolName}://host/cookie`)
      })
    })

    describe('can be accessed', () => {
      let server = null
      before((done) => {
        server = http.createServer((req, res) => {
          const respond = () => {
            if (req.url === '/redirect-cross-site') {
              res.setHeader('Location', `${server.cross_site_url}/redirected`)
              res.statusCode = 302
              res.end()
            } else if (req.url === '/redirected') {
              res.end('<html><script>window.localStorage</script></html>')
            } else {
              res.end()
            }
          }
          setTimeout(respond, 0)
        })
        server.listen(0, '127.0.0.1', () => {
          server.url = `http://127.0.0.1:${server.address().port}`
          server.cross_site_url = `http://localhost:${server.address().port}`
          done()
        })
      })

      after(() => {
        server.close()
        server = null
      })

      const testLocalStorageAfterXSiteRedirect = (testTitle, extraPreferences = {}) => {
        it(testTitle, (done) => {
          w = new BrowserWindow({
            show: false,
            ...extraPreferences
          })
          let redirected = false
          w.webContents.on('crashed', () => {
            expect.fail('renderer crashed / was killed')
          })
          w.webContents.on('did-redirect-navigation', (event, url) => {
            expect(url).to.equal(`${server.cross_site_url}/redirected`)
            redirected = true
          })
          w.webContents.on('did-finish-load', () => {
            expect(redirected).to.be.true('didnt redirect')
            done()
          })
          w.loadURL(`${server.url}/redirect-cross-site`)
        })
      }

      testLocalStorageAfterXSiteRedirect('after a cross-site redirect')
      testLocalStorageAfterXSiteRedirect('after a cross-site redirect in sandbox mode', { sandbox: true })
    })
  })

  describe('websockets', () => {
    let wss = null
    let server = null
    const WebSocketServer = ws.Server

    afterEach(() => {
      wss.close()
      server.close()
    })

    it('has user agent', (done) => {
      server = http.createServer()
      server.listen(0, '127.0.0.1', () => {
        const port = server.address().port
        wss = new WebSocketServer({ server: server })
        wss.on('error', done)
        wss.on('connection', (ws, upgradeReq) => {
          if (upgradeReq.headers['user-agent']) {
            done()
          } else {
            done('user agent is empty')
          }
        })
        const socket = new WebSocket(`ws://127.0.0.1:${port}`)
      })
    })
  })

  describe('Promise', () => {
    it('resolves correctly in Node.js calls', (done) => {
      document.registerElement('x-element', {
        prototype: Object.create(HTMLElement.prototype, {
          createdCallback: {
            value: () => {}
          }
        })
      })
      setImmediate(() => {
        let called = false
        Promise.resolve().then(() => {
          done(called ? void 0 : new Error('wrong sequence'))
        })
        document.createElement('x-element')
        called = true
      })
    })

    it('resolves correctly in Electron calls', (done) => {
      document.registerElement('y-element', {
        prototype: Object.create(HTMLElement.prototype, {
          createdCallback: {
            value: () => {}
          }
        })
      })
      remote.getGlobal('setImmediate')(() => {
        let called = false
        Promise.resolve().then(() => {
          done(called ? void 0 : new Error('wrong sequence'))
        })
        document.createElement('y-element')
        called = true
      })
    })
  })

  describe('fetch', () => {
    it('does not crash', (done) => {
      const server = http.createServer((req, res) => {
        res.end('test')
        server.close()
      })
      server.listen(0, '127.0.0.1', () => {
        const port = server.address().port
        fetch(`http://127.0.0.1:${port}`).then((res) => res.body.getReader())
          .then((reader) => {
            reader.read().then((r) => {
              reader.cancel()
              done()
            })
          }).catch((e) => done(e))
      })
    })
  })

  describe('PDF Viewer', () => {
    before(function () {
      if (!features.isPDFViewerEnabled()) {
        return this.skip()
      }
    })

    beforeEach(() => {
      this.pdfSource = url.format({
        pathname: path.join(fixtures, 'assets', 'cat.pdf').replace(/\\/g, '/'),
        protocol: 'file',
        slashes: true
      })

      this.pdfSourceWithParams = url.format({
        pathname: path.join(fixtures, 'assets', 'cat.pdf').replace(/\\/g, '/'),
        query: {
          a: 1,
          b: 2
        },
        protocol: 'file',
        slashes: true
      })

      this.createBrowserWindow = ({ plugins, preload }) => {
        w = new BrowserWindow({
          show: false,
          webPreferences: {
            preload: path.join(fixtures, 'module', preload),
            plugins: plugins
          }
        })
      }

      this.testPDFIsLoadedInSubFrame = (page, preloadFile, done) => {
        const pagePath = url.format({
          pathname: path.join(fixtures, 'pages', page).replace(/\\/g, '/'),
          protocol: 'file',
          slashes: true
        })

        this.createBrowserWindow({ plugins: true, preload: preloadFile })
        ipcMain.once('pdf-loaded', (event, state) => {
          expect(state).to.equal('success')
          done()
        })
        w.webContents.on('page-title-updated', () => {
          const parsedURL = url.parse(w.webContents.getURL(), true)
          expect(parsedURL.protocol).to.equal('chrome:')
          expect(parsedURL.hostname).to.equal('pdf-viewer')
          expect(parsedURL.query.src).to.equal(pagePath)
          expect(w.webContents.getTitle()).to.equal('cat.pdf')
        })
        w.loadFile(path.join(fixtures, 'pages', page))
      }
    })

    it('opens when loading a pdf resource as top level navigation', (done) => {
      this.createBrowserWindow({ plugins: true, preload: 'preload-pdf-loaded.js' })
      ipcMain.once('pdf-loaded', (event, state) => {
        expect(state).to.equal('success')
        done()
      })
      w.webContents.on('page-title-updated', () => {
        const parsedURL = url.parse(w.webContents.getURL(), true)
        expect(parsedURL.protocol).to.equal('chrome:')
        expect(parsedURL.hostname).to.equal('pdf-viewer')
        expect(parsedURL.query.src).to.equal(this.pdfSource)
        expect(w.webContents.getTitle()).to.equal('cat.pdf')
      })
      w.webContents.loadURL(this.pdfSource)
    })

    it('opens a pdf link given params, the query string should be escaped', (done) => {
      this.createBrowserWindow({ plugins: true, preload: 'preload-pdf-loaded.js' })
      ipcMain.once('pdf-loaded', (event, state) => {
        expect(state).to.equal('success')
        done()
      })
      w.webContents.on('page-title-updated', () => {
        const parsedURL = url.parse(w.webContents.getURL(), true)
        expect(parsedURL.protocol).to.equal('chrome:')
        expect(parsedURL.hostname).to.equal('pdf-viewer')
        expect(parsedURL.query.src).to.equal(this.pdfSourceWithParams)
        expect(parsedURL.query.b).to.be.undefined()
        expect(parsedURL.search.endsWith('%3Fa%3D1%26b%3D2')).to.be.true()
        expect(w.webContents.getTitle()).to.equal('cat.pdf')
      })
      w.webContents.loadURL(this.pdfSourceWithParams)
    })

    it('should download a pdf when plugins are disabled', (done) => {
      this.createBrowserWindow({ plugins: false, preload: 'preload-pdf-loaded.js' })
      // NOTE(nornagon): this test has been skipped for ages, so there's no way
      // to refactor it confidently. The 'set-download-option' ipc was removed
      // around May 2019, so if you're working on the pdf viewer and arrive at
      // this test and want to know what 'set-download-option' did, look here:
      // https://github.com/electron/electron/blob/d87b3ead760ae2d20f2401a8dac4ce548f8cd5f5/spec/static/main.js#L164
      ipcRenderer.sendSync('set-download-option', false, false)
      ipcRenderer.once('download-done', (event, state, url, mimeType, receivedBytes, totalBytes, disposition, filename) => {
        expect(state).to.equal('completed')
        expect(filename).to.equal('cat.pdf')
        expect(mimeType).to.equal('application/pdf')
        fs.unlinkSync(path.join(fixtures, 'mock.pdf'))
        done()
      })
      w.webContents.loadURL(this.pdfSource)
    })

    it('should not open when pdf is requested as sub resource', (done) => {
      fetch(this.pdfSource).then((res) => {
        expect(res.status).to.equal(200)
        expect(document.title).to.not.equal('cat.pdf')
        done()
      }).catch((e) => done(e))
    })

    it('opens when loading a pdf resource in a iframe', (done) => {
      this.testPDFIsLoadedInSubFrame('pdf-in-iframe.html', 'preload-pdf-loaded-in-subframe.js', done)
    })

    it('opens when loading a pdf resource in a nested iframe', (done) => {
      this.testPDFIsLoadedInSubFrame('pdf-in-nested-iframe.html', 'preload-pdf-loaded-in-nested-subframe.js', done)
    })
  })

  describe('window.alert(message, title)', () => {
    it('throws an exception when the arguments cannot be converted to strings', () => {
      expect(() => {
        window.alert({ toString: null })
      }).to.throw('Cannot convert object to primitive value')
    })
  })

  describe('window.confirm(message, title)', () => {
    it('throws an exception when the arguments cannot be converted to strings', () => {
      expect(() => {
        window.confirm({ toString: null }, 'title')
      }).to.throw('Cannot convert object to primitive value')
    })
  })

  describe('window.history', () => {
    describe('window.history.go(offset)', () => {
      it('throws an exception when the argumnet cannot be converted to a string', () => {
        expect(() => {
          window.history.go({ toString: null })
        }).to.throw('Cannot convert object to primitive value')
      })
    })

    describe('window.history.pushState', () => {
      it('should push state after calling history.pushState() from the same url', (done) => {
        w = new BrowserWindow({ show: false })
        w.webContents.once('did-finish-load', async () => {
          // History should have current page by now.
          expect(w.webContents.length()).to.equal(1)

          w.webContents.executeJavaScript('window.history.pushState({}, "")').then(() => {
            // Initial page + pushed state
            expect(w.webContents.length()).to.equal(2)
            done()
          })
        })
        w.loadURL('about:blank')
      })
    })
  })

  // TODO(nornagon): this is broken on CI, it triggers:
  // [FATAL:speech_synthesis.mojom-shared.h(237)] The outgoing message will
  // trigger VALIDATION_ERROR_UNEXPECTED_NULL_POINTER at the receiving side
  // (null text in SpeechSynthesisUtterance struct).
  describe.skip('SpeechSynthesis', () => {
    before(function () {
      if (!features.isTtsEnabled()) {
        this.skip()
      }
    })

    it('should emit lifecycle events', async () => {
      const sentence = `long sentence which will take at least a few seconds to
          utter so that it's possible to pause and resume before the end`
      const utter = new SpeechSynthesisUtterance(sentence)
      // Create a dummy utterence so that speech synthesis state
      // is initialized for later calls.
      speechSynthesis.speak(new SpeechSynthesisUtterance())
      speechSynthesis.cancel()
      speechSynthesis.speak(utter)
      // paused state after speak()
      expect(speechSynthesis.paused).to.be.false()
      await new Promise((resolve) => { utter.onstart = resolve })
      // paused state after start event
      expect(speechSynthesis.paused).to.be.false()

      speechSynthesis.pause()
      // paused state changes async, right before the pause event
      expect(speechSynthesis.paused).to.be.false()
      await new Promise((resolve) => { utter.onpause = resolve })
      expect(speechSynthesis.paused).to.be.true()

      speechSynthesis.resume()
      await new Promise((resolve) => { utter.onresume = resolve })
      // paused state after resume event
      expect(speechSynthesis.paused).to.be.false()

      await new Promise((resolve) => { utter.onend = resolve })
    })
  })
})

describe('console functions', () => {
  it('should exist', () => {
    expect(console.log, 'log').to.be.a('function')
    expect(console.error, 'error').to.be.a('function')
    expect(console.warn, 'warn').to.be.a('function')
    expect(console.info, 'info').to.be.a('function')
    expect(console.debug, 'debug').to.be.a('function')
    expect(console.trace, 'trace').to.be.a('function')
    expect(console.time, 'time').to.be.a('function')
    expect(console.timeEnd, 'timeEnd').to.be.a('function')
  })
})

describe('font fallback', () => {
  async function getRenderedFonts (html) {
    const w = new BrowserWindow({ show: false })
    try {
      await w.loadURL(`data:text/html,${html}`)
      w.webContents.debugger.attach()
      const sendCommand = (...args) => w.webContents.debugger.sendCommand(...args)
      const { nodeId } = (await sendCommand('DOM.getDocument')).root.children[0]
      await sendCommand('CSS.enable')
      const { fonts } = await sendCommand('CSS.getPlatformFontsForNode', { nodeId })
      return fonts
    } finally {
      w.close()
    }
  }

  it('should use Helvetica for sans-serif on Mac, and Arial on Windows and Linux', async () => {
    const html = `<body style="font-family: sans-serif">test</body>`
    const fonts = await getRenderedFonts(html)
    expect(fonts).to.be.an('array')
    expect(fonts).to.have.length(1)
    expect(fonts[0].familyName).to.equal({
      'win32': 'Arial',
      'darwin': 'Helvetica',
      'linux': 'DejaVu Sans' // I think this depends on the distro? We don't specify a default.
    }[process.platform])
  })

  it('should fall back to Japanese font for sans-serif Japanese script', async function () {
    if (process.platform === 'linux') {
      return this.skip()
    }
    const html = `
    <html lang="ja-JP">
      <head>
        <meta charset="utf-8" />
      </head>
      <body style="font-family: sans-serif">test 智史</body>
    </html>
    `
    const fonts = await getRenderedFonts(html)
    expect(fonts).to.be.an('array')
    expect(fonts).to.have.length(1)
    expect(fonts[0].familyName).to.equal({
      'win32': 'Meiryo',
      'darwin': 'Hiragino Kaku Gothic ProN'
    }[process.platform])
  })
})