typescript - 使用 karma-jasmine 和 istanbul 的 Typescript 代码覆盖率

Question

我正在尝试使用 Istanbul 在 karma 框架中获取我的 typescript 代码的代码覆盖率在 karma.conf 中包含 typescript 文件，通过 karma typescript-preprocessor，我们能够对 typescript 代码进行单元测试和代码覆盖，但是代码覆盖率报告用于转码的 JavaScript 代码

如何获取 typescript 代码的覆盖率报告？

这是我的 karma.conf 文件。

module.exports = function(config) {
  config.set({

    // base path, that will be used to resolve files and exclude
    basePath: '',


    // frameworks to use
    frameworks: ['jasmine'],

    preprocessors: {
        'src/**/*.ts': ['typescript', 'coverage'],
        'test/**/*.ts': ['typescript']
    },
    typescriptPreprocessor: {
        options: {
            sourceMap: false, // (optional) Generates corresponding .map file.
            target: 'ES5', // (optional) Specify ECMAScript target version: 'ES3' (default), or 'ES5'
            module: 'amd', // (optional) Specify module code generation: 'commonjs' or 'amd'
            noImplicitAny: true, // (optional) Warn on expressions and declarations with an implied 'any' type.
            noResolve: false, // (optional) Skip resolution and preprocessing.
            removeComments: true, // (optional) Do not emit comments to output.
            concatenateOutput: false // (optional) Concatenate and emit output to single file. By default true if module option is omited, otherwise false.
        },
        // extra typing definitions to pass to the compiler (globs allowed)
        // transforming the filenames
        transformPath: function (path) {
            return path.replace(/\.ts$/, '.js');
        }

        //options: {
        //    sourceMap: true,
        //}
    },

    // list of files / patterns to load in the browser
    files: [

      'src/**/*.ts',
      'test/**/*.ts'
    ],


    // list of files to exclude
    exclude: [
      
    ],
    // test results reporter to use
    // possible values: 'dots', 'progress', 'junit', 'growl', 'coverage'
    reporters: ['progress','coverage'],


    // web server port
    port: 9876,


    // enable / disable colors in the output (reporters and logs)
    colors: true,


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


    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,


    // Start these browsers, currently available:
    // - Chrome
    // - ChromeCanary
    // - Firefox
    // - Opera (has to be installed with `npm install karma-opera-launcher`)
    // - Safari (only Mac; has to be installed with `npm install karma-safari-launcher`)
    // - PhantomJS
    // - IE (only Windows; has to be installed with `npm install karma-ie-launcher`)
    browsers: ['PhantomJS'],


    // If browser does not capture in given timeout [ms], kill it
    captureTimeout: 60000,


    // Continuous Integration mode
    // if true, it capture browsers, run tests and exit
    singleRun: false,
    plugins: [
  'karma-jasmine',
  'karma-chrome-launcher',
  'karma-phantomjs-launcher',
  'karma-typescript-preprocessor',
  'karma-coverage'
  //require('../../../node_modules/karma-typescript-preprocessor/index.js')
    ]

  });
};

Answer 1

安装 karma-typescript :

npm install karma-typescript --save-dev

将其放入您的 karma.conf.js 中:

frameworks: ["jasmine", "karma-typescript"],

files: [
    { pattern: "src/**/*.ts" }
],

preprocessors: {
    "**/*.ts": ["karma-typescript"]
},

reporters: ["progress", "karma-typescript"],

browsers: ["Chrome"]

这将即时运行您的 Typescript 单元测试并生成如下所示的 Istanbul html 覆盖范围:

要运行上面的例子，你需要安装一些包:

npm install @types/jasmine jasmine-core karma karma-chrome-launcher karma-cli karma-jasmine karma-typescript typescript

这是单元测试 vanilla Typescript 代码的完整配置，在这种情况下不需要 tsconfig.json。对于 Angular、React 等更复杂的设置，您可以在 examples folder 中找到示例在integration tests .