Typescript代码在调试单元测试时启用了覆盖率

Question

我有一个混合的Angular应用程序(混合在1.7.5和8.2.10之间)，它使用了TypeScript和JavaScript的混合。

为了运行单元测试，我有两个独立的npm脚本，一个用于ngX测试，另一个用于ng1测试。

我的问题是，当我运行ng1测试进行调试时，typescript代码总是启用了代码覆盖率，这意味着它被缩小了，并且有额外的代码行来计算我正在命中哪些行/分支/语句/函数。这显然使调试成为一种主要的烦恼。这是我用于运行测试的npm脚本

 "test:ng1": "karma start ./src/karma.ng1.conf.js",

下面是我运行的一个配置示例，其中删除了所有覆盖范围插件，以防止覆盖范围代码应用于我的typescript：

module.exports = function(config) {

  var reporters = ['mocha', 'kjhtml'];
  // Only implement coverage if the coverage argument was set
  if(config.coverage){
    reporters.push('coverage-istanbul');
    console.log('Coverage enabled');
  }
  else{
    console.log('Coverage not enabled');
  }

  config.set({
    // base path, that will be used to resolve files and exclude
    basePath: '../',

    // testing framework to use (jasmine/mocha/qunit/...)
    frameworks: ['jasmine', 'karma-typescript'],

    preprocessors: {
      'src/app/**/*.ts': ['karma-typescript'],
      'src/test/spec/**/*.ts': ['karma-typescript'],
      // 'src/app/modules/ng1/**/*.js': ['karma-coverage-istanbul-instrumenter'],
      // 'src/app/modules/ng1/**/*.ts': ['karma-typescript', 'karma-coverage-istanbul-instrumenter'],
      '**/*.html': ['ng-html2js']
    },
    mime: {
      'text/x-typescript': ['ts','tsx']
    },

    // list of files / patterns to load in the browser
    files: [
      'node_modules/babel-polyfill/browser.js',
      'node_modules/jquery/dist/jquery.js',
      'node_modules/angular/angular.js',
      'node_modules/angular-mocks/angular-mocks.js',
      'node_modules/angular-animate/angular-animate.js',
      'node_modules/angular-cookies/angular-cookies.js',
      'node_modules/angular-resource/angular-resource.js',
      'node_modules/angular-sanitize/angular-sanitize.js',
      'node_modules/@uirouter/angularjs/release/angular-ui-router.js',
      'node_modules/ui-bootstrap4/dist/ui-bootstrap-tpls.js',
      'node_modules/lodash/lodash.js',
      'node_modules/angular-growl-v2/build/angular-growl.js',
      'node_modules/angular-jquery-timepicker/src/timepickerdirective.js',
      'node_modules/timepicker/jquery.timepicker.js',
      'node_modules/angularjs-scroll-glue/src/scrollglue.js',
      'node_modules/angular-translate/dist/angular-translate.js',
      'node_modules/moment/moment.js',
      'node_modules/ngstorage/ngStorage.js',
      'node_modules/jasmine-promise-matchers/dist/jasmine-promise-    matchers.js',
      'node_modules/angular-ui-grid/ui-grid.js',
      'src/app/*.ts',
      'src/app/modules/**/*.js',
      'src/app/modules/**/*.ts',
      'src/app/partials/**/*.html',
      'src/test/spec/ipsmicaTestFixtures.js',
      'src/test/spec/**/*.spec.js',
      'src/test/spec/**/*.spec.ts'
    ],

    // list of files / patterns to exclude
    exclude: [
      'src/app/modules/ngX/**/*.spec.ts'
    ],

    ngHtml2JsPreprocessor: {
      cacheIdFromPath: function(filepath) {
        return filepath.replace('src/app/partials/', '');
      },

      moduleName: 'ipsmica.templates'
    },

    // web server port defaults to 9876
    browsers: [
      'ChromeHeadless'
    ],
    browserNoActivityTimeout: 60000,

    // Code coverage report
    reporters: reporters,

    mochaReporter: {
      ignoreSkipped: true
    },

    // coverageIstanbulReporter: {
    //   reports: ['text-summary', 'html'],
    //   fixWebpackSourcePaths: true,
    //   dir: 'target/coverage/ng1',
    //   subdir: '.'
    // },

    // Which plugins to enable
    plugins: [
      'karma-chrome-launcher',
      'karma-jasmine',
      // 'karma-coverage-istanbul-reporter',
      'karma-jasmine-html-reporter',
      // 'karma-coverage-istanbul-instrumenter',
      'karma-mocha-reporter',
      'karma-ng-html2js-preprocessor',
      'karma-typescript'
    ],
    tsconfig: 'tsconfig.spec.json',
    colors: true,

    // level of logging
    // possible values: LOG_DISABLE || LOG_ERROR || LOG_WARN || LOG_INFO ||     LOG_DEBUG
    logLevel: config.LOG_INFO
  });
};

有了这个配置，typescript代码在调试时仍然嵌入了覆盖率代码。如何禁用此功能？

Answer 1

对于遇到这种情况的任何人来说，问题是karma-typescript会自动启用代码覆盖率，所以我只需要添加一个设置来禁用它并启用源代码映射

在我的报应配置中

karmaTypescriptConfig = {
  bundleOptions:{
    sourceMap: true
  },
  coverageOptions:{
    instrumentation : false
  }
};