124 lines
4.1 KiB
JavaScript
124 lines
4.1 KiB
JavaScript
const asar = require('asar')
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const fs = require('fs')
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const glob = require('glob')
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const mkdirp = require('mkdirp')
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const path = require('path')
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const rimraf = require('rimraf')
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const {Collector, Instrumenter, Reporter} = require('istanbul')
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const outputPath = path.join(__dirname, '..', '..', 'out', 'coverage')
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const libPath = path.join(__dirname, '..', '..', 'lib')
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// Add unrequired files to the coverage report so all files are present there
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const addUnrequiredFiles = (coverage) => {
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const instrumenter = new Instrumenter()
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const libPath = path.join(__dirname, '..', '..', 'lib')
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glob.sync('**/*.js', {cwd: libPath}).map(function (relativePath) {
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return path.join(libPath, relativePath)
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}).filter(function (filePath) {
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return coverage[filePath] == null
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}).forEach(function (filePath) {
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instrumenter.instrumentSync(fs.readFileSync(filePath, 'utf8'), filePath)
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// When instrumenting the code, istanbul will give each FunctionDeclaration
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// a value of 1 in coverState.s,presumably to compensate for function
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// hoisting. We need to reset this, as the function was not hoisted, as it
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// was never loaded.
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Object.keys(instrumenter.coverState.s).forEach(function (key) {
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instrumenter.coverState.s[key] = 0
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});
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coverage[filePath] = instrumenter.coverState
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})
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}
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// Add coverage data to collector for all opened browser windows
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const addBrowserWindowsData = (collector) => {
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const dataPath = path.join(outputPath, 'data')
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glob.sync('*.json', {cwd: dataPath}).map(function (relativePath) {
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return path.join(dataPath, relativePath)
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}).forEach(function (filePath) {
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collector.add(JSON.parse(fs.readFileSync(filePath)));
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})
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}
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// Generate a code coverage report in out/coverage/lcov-report
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exports.generateReport = () => {
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const coverage = window.__coverage__
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if (coverage == null) return
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addUnrequiredFiles(coverage)
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const collector = new Collector()
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collector.add(coverage)
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const {ipcRenderer} = require('electron')
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collector.add(ipcRenderer.sendSync('get-coverage'))
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addBrowserWindowsData(collector)
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const reporter = new Reporter(null, outputPath)
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reporter.addAll(['text', 'lcov'])
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reporter.write(collector, true, function () {})
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}
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// Save coverage data from the browser window with the given pid
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const saveCoverageData = (webContents, coverage, pid) => {
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if (coverage && pid) {
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const dataPath = path.join(outputPath, 'data', `${pid || webContents.getId()}-${webContents.getType()}-${Date.now()}.json`)
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mkdirp.sync(path.dirname(dataPath))
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fs.writeFileSync(dataPath, JSON.stringify(coverage))
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}
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}
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const getCoverageFromWebContents = (webContents, callback) => {
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webContents.executeJavaScript('[window.__coverage__, window.process && window.process.pid]', (results) => {
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const coverage = results[0]
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const pid = results[1]
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callback(coverage, pid)
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})
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}
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// Save coverage data when a BrowserWindow is closed manually
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const patchBrowserWindow = () => {
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const {BrowserWindow} = require('electron')
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const {destroy} = BrowserWindow.prototype
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BrowserWindow.prototype.destroy = function () {
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if (this.isDestroyed() || !this.getURL()) {
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return destroy.call(this)
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}
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getCoverageFromWebContents(this.webContents, (coverage, pid) => {
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saveCoverageData(this.webContents, coverage, pid)
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destroy.call(this)
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})
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}
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}
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// Save coverage data when beforeunload fires on the webContent's window object
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const saveCoverageOnBeforeUnload = () => {
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const {app, ipcMain} = require('electron')
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ipcMain.on('save-coverage', function (event, coverage, pid) {
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saveCoverageData(event.sender, coverage, pid)
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})
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app.on('web-contents-created', function (event, webContents) {
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webContents.executeJavaScript(`
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window.addEventListener('beforeunload', function () {
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require('electron').ipcRenderer.send('save-coverage', window.__coverage__, window.process && window.process.pid)
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})
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`)
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})
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}
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exports.setupCoverage = () => {
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const coverage = global.__coverage__
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if (coverage == null) return
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rimraf.sync(path.join(outputPath, 'data'))
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patchBrowserWindow()
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saveCoverageOnBeforeUnload()
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}
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