How to use the plugin with karma ?

[dhoko]

Hi,

I tried to replace isparta... but it doesn't work :/

07 06 2016 14:02:48.030:ERROR [coverage]: [TypeError: Cannot read property 'start' of undefined]                                
TypeError: Cannot read property 'start' of undefined                                                                            
    at /home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_modules/karma-coverage/node_modules/
istanbul/lib/object-utils.js:59:44                                                                                              
    at Array.forEach (native)                                                                                                   
    at Object.addDerivedInfoForFile (/home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_module
s/karma-coverage/node_modules/istanbul/lib/object-utils.js:58:37)                                                               
    at Object.Collector.fileCoverageFor (/home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_mo
dules/karma-coverage/node_modules/istanbul/lib/collector.js:94:15)                                                              
    at /home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_modules/karma-coverage/node_modules/
istanbul/lib/report/lcovonly.js:96:65                                                                                           
    at Array.forEach (native)                                                                                                   
    at /home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_modules/karma-coverage/node_modules/
istanbul/lib/report/lcovonly.js:95:31                                                                                           
    at SyncFileWriter.extend.writeFile (/home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_mod
ules/karma-coverage/node_modules/istanbul/lib/util/file-writer.js:57:9)                                                         
    at FileWriter.extend.writeFile (/home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_modules
/karma-coverage/node_modules/istanbul/lib/util/file-writer.js:147:23)                                                           
    at LcovOnlyReport.Report.mix.writeReport (/home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/no
de_modules/karma-coverage/node_modules/istanbul/lib/report/lcovonly.js:94:16)                                                   
    at LcovReport.Report.mix.writeReport (/home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_m
odules/karma-coverage/node_modules/istanbul/lib/report/lcov.js:54:19)                                                           
    at writeReport (/home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_modules/karma-coverage/
lib/reporter.js:62:16)                                                                                                          
    at /home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_modules/karma-coverage/lib/reporter.
js:290:11                                                                                                                       
    at /home/dhoko/dev/front-app/src/SquareCo/AngularBundle/Resources/public/node_modules/karma/lib/helper.js:82:7    
    at FSReqWrap.oncomplete (fs.js:82:15) 

karma.config.js

// You can remove these lines, still does not work
babelPreprocessor: {
  options: {
    presets: ['es2015'],
    plugins: [ '__coverage__' ]
  }
},

 // With or without, all or only the two ['babel'']
preprocessors: {
  // '../../src/{Core,App}/**/!(isInviewPort|index|repeater).js': ['coverage'],
  '../../src/{Core,App}/**/*.js': ['babel'],
  'src/**/*.js': ['babel'],
},

coverageReporter: {
  // instrumenters: {
  //   isparta : require('isparta')
  // },
  // instrumenter: {
  //   '../../src/{Core,App}/**/**/*.js': 'isparta',
  //   'src/**/*.js': 'isparta'
  // },
  // instrumenterOptions: {
  //   isparta: {
  //     babel: {
  //       presets: 'es2015'
  //     }
  //   }
  // },
  reporters:[
    {type: 'html', dir: '../coverage/'},
    {type: 'clover', dir: '../coverage/clover/'}
  ]
},
reporters: ['progress', 'coverage', 'junit'],
junitReporter: {
  outputDir: '../coverage',
  outputFile: 'test-results.xml'
},

I don't use webpack so, tried to adapt your configuration but was not able to make it work. Do you have something without webpack ?

[dtinth]

I have tried a simple karma+babel+coverage example, and it works fine. However this problem usually happens when the plugin produces an invalid line number mapping. This is a rare bug.

Can you try adding some console.log to object-utils.js and see which file the plugin made the mistake, and if possible, can I have a look at that file? Also, can I have the preprocessed version of that file? (You can find it by going to localhost:9876/debug.html. Its source code will contain script tags that links to the preprocessed file.)

[dhoko]

Ex:

Src:

angular.module('analytics', ['ui.router'])
  .run(($rootScope, trackerApi, eventTracker) => {

    trackerApi.start();

    $rootScope.$on('$stateChangeSuccess', (e, state, params) => {
      eventTracker()
        .onIdle(angular.extend({
          stateName: state.name.replace(/\./g, '-')
        }, params), true);
    });
  });

console.log object-utils.js L57

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Only 4 statements (statementMap) but a list of 377 (json.s).