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feat(@angular/cli): improve ng test performance
This PR uses a new Karma plugin to enable vendor bundles in unit tests, increasing rebuild performance. On a medium size project rebuilds times were 15x smaller (16.5s to 0.9s). Fix #5423
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10 files changed

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‎package.json‎

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@@ -63,8 +63,6 @@
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"isbinaryfile": "^3.0.0",
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"istanbul-instrumenter-loader": "^2.0.0",
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"json-loader": "^0.5.4",
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"karma-sourcemap-loader": "^0.3.7",
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"karma-webpack": "^2.0.0",
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"less": "^2.7.2",
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"less-loader": "^4.0.2",
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"loader-utils": "^1.0.2",
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"url-loader": "^0.5.7",
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"walk-sync": "^0.3.1",
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"webpack": "~2.4.0",
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"webpack-dev-middleware": "^1.10.2",
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"webpack-dev-server": "~2.4.2",
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"webpack-merge": "^2.4.0",
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"zone.js": "^0.8.4"

‎packages/@angular/cli/blueprints/ng/files/karma.conf.js‎

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@@ -15,25 +15,14 @@ module.exports = function (config) {
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client:{
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clearContext: false // leave Jasmine Spec Runner output visible in browser
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},
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files: [
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{ pattern: './<%= sourceDir %>/test.ts', watched: false }
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],
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preprocessors: {
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'./<%= sourceDir %>/test.ts': ['@angular/cli']
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},
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mime: {
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'text/x-typescript': ['ts','tsx']
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},
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coverageIstanbulReporter: {
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reports: [ 'html', 'lcovonly' ],
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fixWebpackSourcePaths: true
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},
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angularCli: {
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environment: 'dev'
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},
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reporters: config.angularCli && config.angularCli.codeCoverage
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? ['progress', 'coverage-istanbul']
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: ['progress', 'kjhtml'],
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reporters: ['progress', 'kjhtml'],
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port: 9876,
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colors: true,
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logLevel: config.LOG_INFO,

‎packages/@angular/cli/models/webpack-configs/test.ts‎

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@@ -4,7 +4,7 @@ import * as webpack from 'webpack';
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import { CliConfig } from '../config';
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import { WebpackTestOptions } from '../webpack-test-config';
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import { KarmaWebpackEmitlessError } from '../../plugins/karma-webpack-emitless-error';
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/**
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* Enumerate loaders and their dependencies from this file to let the dependency validator
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const configPath = CliConfig.configFilePath();
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const projectRoot = path.dirname(configPath);
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const appConfig = CliConfig.fromProject().config.apps[0];
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const nodeModules = path.resolve(projectRoot, 'node_modules');
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const extraRules: any[] = [];
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const extraPlugins: any[] = [];
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if (testConfig.codeCoverage && CliConfig.fromProject()) {
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const codeCoverageExclude = CliConfig.fromProject().get('test.codeCoverage.exclude');
@@ -38,7 +40,6 @@ export function getTestConfig(testConfig: WebpackTestOptions) {
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});
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}
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extraRules.push({
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test: /\.(js|ts)$/, loader: 'istanbul-instrumenter-loader',
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enforce: 'post',
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return {
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devtool: testConfig.sourcemaps ? 'inline-source-map' : 'eval',
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entry: {
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test: path.resolve(projectRoot, appConfig.root, appConfig.test)
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main: path.resolve(projectRoot, appConfig.root, appConfig.test)
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},
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module: {
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rules: [].concat(extraRules)
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},
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plugins: [
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new webpack.SourceMapDevToolPlugin({
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filename: null, // if no value is provided the sourcemap is inlined
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test: /\.(ts|js)($|\?)/i // process .js and .ts files only
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new webpack.optimize.CommonsChunkPlugin({
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minChunks: Infinity,
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name: 'inline'
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}),
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new KarmaWebpackEmitlessError()
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]
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new webpack.optimize.CommonsChunkPlugin({
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name: 'vendor',
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chunks: ['main'],
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minChunks: (module: any) => module.resource && module.resource.startsWith(nodeModules)
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})
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].concat(extraPlugins)
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};
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}

‎packages/@angular/cli/models/webpack-test-config.ts‎

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import * as webpack from 'webpack';
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const webpackMerge = require('webpack-merge');
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import { BuildOptions } from './build-options';
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];
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this.config = webpackMerge(webpackConfigs);
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delete this.config.entry;
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// Remove any instance of CommonsChunkPlugin, not needed with karma-webpack.
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this.config.plugins = this.config.plugins.filter((plugin: any) =>
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!(plugin instanceof webpack.optimize.CommonsChunkPlugin));
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return this.config;
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}

‎packages/@angular/cli/package.json‎

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"inquirer": "^3.0.0",
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"isbinaryfile": "^3.0.0",
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"json-loader": "^0.5.4",
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"karma-sourcemap-loader": "^0.3.7",
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"karma-webpack": "^2.0.0",
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"less": "^2.7.2",
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"less-loader": "^4.0.2",
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"lodash": "^4.11.1",
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"url-loader": "^0.5.7",
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"walk-sync": "^0.3.1",
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"webpack": "~2.4.0",
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"webpack-dev-middleware": "^1.10.2",
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"webpack-dev-server": "~2.4.2",
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"webpack-merge": "^2.4.0",
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"zone.js": "^0.8.4"

‎packages/@angular/cli/plugins/karma-context.html‎

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<!DOCTYPE html>
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<!--
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This is the execution context.
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Loaded within the iframe.
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Reloaded before every execution run.
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-->
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<html>
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<head>
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<title></title>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" />
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</head>
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<body>
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<!-- The scripts need to be in the body DOM element, as some test running frameworks need the body
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to have already been created so they can insert their magic into it. For example, if loaded
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before body, Angular Scenario test framework fails to find the body and crashes and burns in
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an epic manner. -->
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<script src="context.js"></script>
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<script type="text/javascript">
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// Configure our Karma and set up bindings
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%CLIENT_CONFIG%
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window.__karma__.setupContext(window);
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// All served files with the latest timestamps
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%MAPPINGS%
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</script>
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<script type="text/javascript" src="_karma_webpack_/inline.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript" src="_karma_webpack_/polyfills.bundle.js" crossorigin="anonymous"></script>
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<!-- Dynamically replaced with <script> tags -->
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%SCRIPTS%
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<script type="text/javascript" src="_karma_webpack_/scripts.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript" src="_karma_webpack_/vendor.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript" src="_karma_webpack_/main.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript">
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window.__karma__.loaded();
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</script>
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</body>
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</html>

‎packages/@angular/cli/plugins/karma-debug.html‎

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<!doctype html>
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<!--
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This file is almost the same as context.html - loads all source files,
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but its purpose is to be loaded in the main frame (not within an iframe),
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just for immediate execution, without reporting to Karma server.
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-->
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<html>
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<head>
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%X_UA_COMPATIBLE%
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<title>Karma DEBUG RUNNER</title>
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<link href="favicon.ico" rel="icon" type="image/x-icon" />
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" />
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</head>
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<body>
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<!-- The scripts need to be at the end of body, so that some test running frameworks
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(Angular Scenario, for example) need the body to be loaded so that it can insert its magic
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into it. If it is before body, then it fails to find the body and crashes and burns in an epic
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manner. -->
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<script src="context.js"></script>
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<script src="debug.js"></script>
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<script type="text/javascript">
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// Configure our Karma
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%CLIENT_CONFIG%
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// All served files with the latest timestamps
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%MAPPINGS%
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</script>
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<script type="text/javascript" src="_karma_webpack_/inline.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript" src="_karma_webpack_/polyfills.bundle.js" crossorigin="anonymous"></script>
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<!-- Dynamically replaced with <script> tags -->
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%SCRIPTS%
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<script type="text/javascript" src="_karma_webpack_/scripts.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript" src="_karma_webpack_/vendor.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript" src="_karma_webpack_/main.bundle.js" crossorigin="anonymous"></script>
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<script type="text/javascript">
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window.__karma__.loaded();
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</script>
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</body>
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</html>

‎packages/@angular/cli/plugins/karma-webpack-emitless-error.ts‎

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