karma-coverage: Karma coverage does not show any data when using webpack + ES6

My config

module.exports = function(config) {
  config.set({
    browsers: ["ChromeCanary"],
    coverageReporter: {
      type: "html",
      dir : "./docs/js-coverage"
    },
    files: [{
        pattern: "test.bundle.js",
        watched: false
      }],
    frameworks: ["jasmine"],
    preprocessors: {
        "src/main/webapp/**/*.js": "coverage",
        "test.bundle.js": ["webpack"]
    },
    reporters: ["coverage", "dots"],
    singleRun: false,
    webpack: {
        module: {
            loaders: [{
                  test: /\.js/,
                  exclude: /node_modules/,
                  loader: "babel-loader?cacheDirectory&optional[]=runtime"
                }]
        },
        watch: true
    },
    webpackServer: {
        noInfo: true
    }
  });
};

test.bundle.js

var context = require.context("./src/main/webapp", true, /.+\.test\.js$/);
context.keys().forEach(context);

Tests run fine, HTML report is generated, but it contains no files in the list.

Thanks.

About this issue

Original URL
State: closed
Created 9 years ago
Reactions: 10
Comments: 19 (1 by maintainers)

Commits related to this issue

Karma set up except for this bug https://github.com/karma-runner/karma-coverage/issues/184 — committed to naomiaro/waveform-playlist by naomiaro 9 years ago
chore(coverage): Remove test coverage Because of https://github.com/karma-runner/karma-coverage/issues/184 — committed to egoroof/browser-id3-writer by egoroof 8 years ago

Most upvoted comments

Was not able to get coverage information with webpack (2) and karma-coverage. Had to use both “istanbul-instrumenter-loader” as a webpack file loader for test run and “karma-coverage-istanbul-reporter” as coverage reporter and after couple of days of struggles it worked.

florin05 on Nov 30, 2017

coverage sourcemap not work. only index.js.

no filelists, can you help me?

songguangyu on Nov 26, 2017

I have the same problem. I thought I did something wrong, but whatever I try, it just comes up with zero files in the generated HTML. Is this a bug?

Edit: I fixed this by adding isparta preloaders to the webpack.module:

preLoaders: [
  { test: /\.js|jsx$/, exclude: /(src|node_modules)/, loaders: ['babel'] },
  { test: /\.js|jsx$/, include: /(src)/, loaders: ['isparta'] }
],

marcelpanse on Dec 17, 2015

Hi, I found an alternative. Use Isparta loader in your karma conf file.

preLoaders: [
   {
        test: /^((?!spec).)*\.js$/,
        include: path.resolve('src/'),
        loader: 'isparta'
   }
],

Don’t forget to require karma-coverage and add it in preprocessors.

I hope it will help you.

Clebiez on Jan 11, 2017