third_party/blink/renderer/devtools/karma.conf.js

// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module.exports = function(config) {
  const options = {
    basePath: "",

    files: [{
      pattern: 'front_end/**/*.js',
      included: false,
      served: true
    },{
      pattern: 'tests/**/*.ts',
      type: 'module'
    }],

    reporters: ["dots", "coverage-istanbul"],

    preprocessors: {
      './tests/**/*.ts': ['karma-typescript'],
      './front_end/common/*.js': ['karma-coverage-istanbul-instrumenter']
    },

    browsers: ["ChromeHeadless"],

    frameworks: ["mocha", "chai", "karma-typescript"],

    karmaTypescriptConfig: {
      compilerOptions: {
        target: "esnext",
        module: "esnext",
        typeRoots: ["../../../../third_party/devtools-node-modules/third_party/node_modules/@types"]
      },
      coverageOptions: {
        instrumentation: false
      },
      bundlerOptions: {
        resolve: {
          directories: ["../../../../third_party/devtools-node-modules/third_party/node_modules"]
        }
      },
      exclude: [
        "scripts"
      ]
    },

    proxies: {
      '/front_end': '/base/front_end',
    },

    plugins: [
      "karma-chrome-launcher",
      "karma-mocha",
      "karma-chai",
      "karma-typescript",
      require('../../../../third_party/devtools-node-modules/third_party/node_modules/karma-coverage-istanbul-instrumenter'),
      require('../../../../third_party/devtools-node-modules/third_party/node_modules/karma-coverage-istanbul-reporter')
    ],

    coverageIstanbulInstrumenter: {
      esModules: true
    },

    coverageIstanbulReporter: {
      reports: ["text", "html"],
      dir: "karma-coverage"
    },

    singleRun: true
  };

  config.set(options);
};