Mocha, nyc code coverage - only testing files are covered - testing

Question

I wrote some tests which are placed in folder test.
Problem: Code coverage with nyc shows me only CC for tested files.
Want: All files in src to be shown in CC with precentage, even if they are not tested yet.
My package json and scripts:
"scripts": {
"start": "node ./node_modules/webpack-dev-server/bin/webpack-dev-server.js",
"test": "mocha --compilers js:babel-core/register --require ./test/testing_helper.js ./test/**/*.js",
"test:watch": "npm run test -- --watch",
"code:coverage": "nyc npm run test"
},
"author": "",
"license": "",
"devDependencies": {
"babel-core": "^6.2.1",
"babel-loader": "^6.2.0",
"babel-preset-es2015": "^6.1.18",
"babel-preset-react": "^6.1.18",
"chai": "^3.5.0",
"chai-jquery": "^2.0.0",
"expect": "^21.2.1",
"jquery": "^2.2.1",
"jsdom": "^8.1.0",
"mocha": "^2.4.5",
"nyc": "^11.3.0",
"react-addons-test-utils": "^0.14.7",
"webpack": "^1.12.9",
"webpack-dev-server": "^1.14.0"
},
"dependencies": {
"babel-preset-stage-1": "^6.1.18",
"lodash": "^3.10.1",
"react": "^0.14.3",
"react-dom": "^0.14.3",
"react-redux": "4.3.0",
"react-router": "^2.0.1",
"redux": "^3.0.4",
"redux-devtools-extension": "^2.13.2"
}
testing_helper.js has many imports for example. jsdom, so whenever I try to
make a script with config for nyc includes: testing_helper.js it always says:
unexpected import token -> and reference to jsdom.
Thanks for any help.

Answer 1

Use a nyc configuration file like this (from here):
{
"all": true,
"include": [
"src/**/*.js"
],
"exclude": [
"**/*.spec.js"
]
}