Istanbul coverage with mocha test cases only showing coverage report for spec files (test files)

Istanbul coverage report only shows coverage report for the spec files i.e the test files and not the original router and controllers files.

It displays 100% coverage for spec files and 0% for the router files.

The command i am using is npm test:

"test": "NODE_ENV=development istanbul cover --include-all-sources --root ./server ./node_modules/.bin/_mocha -- --compilers js:babel-core/register --recursive './server/**/**/**/*-spec.js'"

Below is the screenshot of the coverage report html file by istanbul
enter image description here

1 Answer
1

I manage to make it work for me, maybe you can pick some of my configs and apply them to your environment

My current packages version

"@babel/core": "^7.0.0", "@babel/register": "^7.0.0", "babel-plugin-istanbul": "^5.0.1", "chai": "^4.1.2", "mocha": "^5.2.0", "nyc": "^13.0.1"

Update/Create your .babelrc adding the pluging for istanbul

.babelrc

"plugins": ["istanbul"]

Create a config file for istanbul: .nycrc and paste this configuration

.nycrc

"require": ["@babel/register"],
"exclude": ["**/*.test,spec.js"],
"all": true,
"instrument": false

You can check for more options in the official nyc repository

./node_modules/.bin/nyc mocha **/*.test,spec.js

npx nyc mocha **/*.test,spec.js

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