带有Mocha测试用例的Istanbul覆盖率仅显示规格文件（测试文件）的覆盖率报告

Question

Istanbul coverage report only shows coverage report for the spec files ie 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

Answer 1

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

1. 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" 

2. Update/Create your .babelrc adding the pluging for istanbul

   { "plugins": ["istanbul"] }

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

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

You can check for more options in the official nyc repository

4. Then run the tests

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

or

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