Generate coverage with Mocha and Istanbul

Question

I was testing my app with Jest, but how it's so hard to find documentation on internet I changed to Mocha

Now I'm trying to generate the coverage.

In my package.json I put the line to test:

scripts: {
     ...
     "test": "mocha './src/__tests__/**/*.test.js' --compilers js:babel-core/register"
}

What do I need to generate the coverage with Istanbul or something else?

Possible duplicate of [Running Mocha + Istanbul + Babel](http://stackoverflow.com/questions/33621079/running-mocha-istanbul-babel) — Louis, May 30 '16 at 10:36
Possible duplicate of [Code coverage with Mocha](https://stackoverflow.com/questions/16633246/code-coverage-with-mocha) — lifeisfoo, Jul 18 '17 at 11:19

score 1 · Answer 1 · answered May 06 '16 at 13:41

You can use isparta for code coverage since it will give the coverage for the ES6 code rather than ES5 code. Here is a very good article which I followed to generate the code coverage: https://onsen.io/blog/mocha-chaijs-unit-test-coverage-es6/. Please do check it and let me know if you are able to generate the coverage.

score 1 · Accepted Answer · answered May 30 '16 at 07:34

1

This is what I use in my scripts block (among others):

  "scripts": {
    "cover": "node_modules/.bin/istanbul cover node_modules/.bin/_mocha -- -R spec test"
  }

answered May 30 '16 at 07:34

Andrew Eddie

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Generate coverage with Mocha and Istanbul

2 Answers2