与业力有关的问题-浏览+业力覆盖

Question

我很难让karma-browserify与karma-coverage一起工作。我花了很多时间试图找出出了什么问题，但我没有找到解决办法。

下面是我的.js文件(函数什么都不做；它们只是测试代码覆盖率的模拟)：

// src/js/utilities/form-validation.js

let includedInTest = () => true;

let alsoIncludedInTest = () => true;

let notIncludedInTest = () => true;

let alsoNotIncludedInTest = () => true;

export default {
  includedInTest,
  alsoIncludedInTest
};

这是我的测试文件：

// src/spec/utilities/form-validation.spec.js

import formUtilities from '../../js/utilities/form-validation';

describe('Form validation functions', function () {

  it('Should return "true"', function () {
    expect(formUtilities.includedInTest()).toBe(true);
  });

  it('Should return "true"', function () {
    expect(formUtilities.alsoIncludedInTest()).toBe(true);
  });

});

最后，这是我的karma.conf：

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['browserify', 'jasmine-jquery', 'jasmine'],
    files: [
      'bower_components/jquery/dist/jquery.js',
      'bower_components/jquery-validation/dist/jquery.validate.js',
      'src/js/**/*.js',
      'src/spec/**/*.spec.js'
    ],
    exclude: [
      'src/js/index.js'
    ],
    preprocessors: {
      'src/js/**/*.js': ['browserify', 'coverage'],
      'src/spec/**/*.spec.js': ['browserify']
    },
    browserify: {
      debug: true,
      transform: [
        ['babelify', { presets: ['es2015'] }]
      ]
    },
    reporters: ['mocha', 'coverage'],
    mochaReporter: {
      colors: {
        success: 'green',
        info: 'bgBlue',
        warning: 'cyan',
        error: 'bgRed'
      },
      symbols: {
        success: '√',
        info: '#',
        warning: '!',
        error: 'x'
      }
    },
    coverageReporter: {
      instrumenters: { isparta: require('isparta') },
      instrumenter: {
        'src/**/*.js': 'isparta'
      },
      dir: 'coverage',
      subdir: '.',
      reporters: [
        { type: 'html', dir: 'coverage' },
        { type: 'text-summary' }
      ],
      check: {
        global: {
          statements: 90,
          branches: 90,
          functions: 90,
          lines: 90
        },
        each: {
          statements: 90,
          branches: 90,
          functions: 90,
          lines: 90
        }
      },
      watermarks: {
        statements: [50, 75],
        functions: [50, 75],
        branches: [50, 75],
        lines: [50, 75]
      }
    },
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['PhantomJS'],
    singleRun: false,
    concurrency: Infinity
  });
};

此配置将产生以下结果：

==== Coverage summary ====
Statements   : 100% ( 1/1 )
Branches     : 100% ( 2/2 )
Functions    : 100% ( 0/0 )
Lines        : 100% ( 1/1 )
=============

这显然是错误的，因为我在"form-validation.js“上有四个函数，我正在测试其中的两个函数。但根据总结报告，没有任何功能需要测试。

coverage/index.html中的这一行只显示了karma-coverage正在解析的一行

​

​

我还在transform数组中尝试了‘browserify-伊斯坦布尔’(并从“coverageReport”中删除了工具)：

transform: [
  ['babelify', { presets: ['es2015'] }],
  'browserify-istanbul'
]

但是这会产生一个错误：

18 08 2017 15:50:14.617:ERROR [karma]: TypeError: Cannot read property 'start' of undefined
    at /Users/gferraz/Sites/OAA-Refactor/node_modules/istanbul/lib/object-utils.js:59:44
    at Array.forEach (native)
    at Object.addDerivedInfoForFile (/Users/gferraz/Sites/OAA-Refactor/node_modules/istanbul/lib/object-utils.js:58:37)
    at Collector.fileCoverageFor (/Users/gferraz/Sites/OAA-Refactor/node_modules/istanbul/lib/collector.js:94:15)
    at /Users/gferraz/Sites/OAA-Refactor/node_modules/istanbul/lib/collector.js:108:30
    at Array.forEach (native)
    at Collector.getFinalCoverage (/Users/gferraz/Sites/OAA-Refactor/node_modules/istanbul/lib/collector.js:107:22)
    at checkCoverage (/Users/gferraz/Sites/OAA-Refactor/node_modules/karma-coverage/lib/reporter.js:148:33)
    at /Users/gferraz/Sites/OAA-Refactor/node_modules/karma-coverage/lib/reporter.js:257:32
    at Array.forEach (native)
    at Collection.forEach (/Users/gferraz/Sites/OAA-Refactor/node_modules/karma/lib/browser_collection.js:93:21)
    at /Users/gferraz/Sites/OAA-Refactor/node_modules/karma-coverage/lib/reporter.js:247:16
    at Array.forEach (native)
    at CoverageReporter.onRunComplete (/Users/gferraz/Sites/OAA-Refactor/node_modules/karma-coverage/lib/reporter.js:246:15)
    at Server.<anonymous> (/Users/gferraz/Sites/OAA-Refactor/node_modules/karma/lib/events.js:13:22)
    at emitTwo (events.js:111:20)

关于如何修复配置文件，有什么建议吗？

Answer 1

这篇文章的正确答案所建议的配置帮助了我：Karma/Istanbul Code Coverage does not find functions and always returns 100%

现在，我在html报告ERROR [coverage]: TypeError: Cannot read property 'text' of undefined上得到了一个错误(这意味着我想为报告生成的html文件没有生成)，这似乎与伊斯坦布尔有关。但是，我在我的终端窗口上得到了正确的代码覆盖率报告：

​

​

奇怪的是，错误并不是每次测试运行时都会发生，所以有时我可以很好地获得html文件。

下面是解决了我问题上的问题的karma.conf：

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['browserify', 'jasmine-jquery', 'jasmine'],
    files: [
      'bower_components/jquery/dist/jquery.js',
      'bower_components/jquery-validation/dist/jquery.validate.js',
      'src/js/**/*.js',
      'src/spec/**/*.spec.js'
    ],
    exclude: [
      'src/js/index.js'
    ],
    preprocessors: {
      'src/js/**/*.js': ['browserify'],
      'src/spec/**/*.spec.js': ['browserify']
    },
    browserify: {
      debug: true,
      extensions: ['.js'],
      configure: (bundle) => {
        bundle.transform('babelify', { presets: ['es2015'] });
        bundle.transform(require('browserify-istanbul')({
          ignore: ['**/spec/**']
        }));
      }     
    },
    reporters: ['mocha', 'coverage'],
    coverageReporter: {
      dir: 'coverage',
      subdir: '.',
      reporters: [
        { type: 'html', dir: 'coverage' },
        { type: 'text-summary' }
      ],

      etc...
    }
  });
};