CODEWITHSUNDEEP
mocha.jscode-coverageecmascript-6babeljsistanbul
Danosaure
Danosaure

Reputation: 3655

babel-istanbul cover exclude file from report but keep to transpile

My goal is to be able to write src and tests files in es6, all in the same directory (I want my test files to be side-by-side with my source files), and get coverage report with the original files.

The best I can come up with at this point is to have my test files included in the coverage report with the following command:

./node_modules/.bin/babel-node node_modules/.bin/babel-istanbul \
    cover \
    node_modules/.bin/_mocha -- 'src/**/*.spec.*.js'

I did try using the cover -x 'src/**/*.spec.*.js', it also excludes the files from transpiling and mocha then fails to run the tests. For the life of me, I cannot figure out how to do the equivalent of something like this:

./node_modules/.bin/babel-node node_modules/.bin/babel-istanbul \
  cover -x 'src/**/*.spec.*.js' \
  node_modules/.bin/_mocha -- --require babel-core/register 'src/**/*.spec.*.js'

this will run all my tests fine but has the negative effect of giving me:

No coverage information was collected, exit without writing coverage information

So I am not too far from what I want, I'm think I'm just missing that last piece there and if somebody can help here, it would be really appreciated.

Regards, D.

Upvotes: 4

Views: 1375

Answers (2)

Danosaure
Danosaure

Reputation: 3655

For anyone finding this much later, the stack with mocha, @babel and nyc is much much much much (did I say much?) easier to configure. No more need of that babel-node.

package.json:

{
  ...
  "scripts": {
    "coveralls": "cat reports/coverage/lcov/info | coveralls", // <-- Used on CI
    "coverage": "nyc --report-dir=reports/coverage npm test",
    "test": "mocha \"src/**/*.test.js?(x)\""
  },
  "mocha": {
    "require": [
      "@babel/register",
      ...
    ]
  },
  ...
}

and here's an example of my .nycrc:

{
  "all": true,
  "cache": false,
  "temp-dir": "./reports/nyc_output",
  "check-coverage": false,
  "require": [
    "@babel/register"
  ],
  "exclude": [
    "dist/",
    "reports/",
    "src/**/*.test.js",
    "src/**/*.test.jsx"
  ],
  "extension": [
    ".js",
    ".jsx"
  ],
  "reporter": [
    "cobertura",
    "lcov",
    "html"
  ],
  "watermarks": {
    "statements": [50, 80],
    "lines": [50, 80],
    "functions": [50, 80],
    "branches": [50, 80]
  }
}

Upvotes: 0

thebearingedge
thebearingedge

Reputation: 681

Never got the -x option to do what I wanted. If you don't mind using an .istanbul.yml file this worked for me to get side-by-side tests excluded from coverage reports...

npm run cover command:

babel-node node_modules/.bin/babel-istanbul cover _mocha -- --opts mocha.opts

project_dir/mocha.opts file:

src/**/*.test.js
--compilers js:babel-register
--require babel-polyfill

project_dir/.istanbul.yml file:

instrumentation:
  root: src
  include-all-sources: true
  verbose: true
  excludes: ["*.test.js"]
reporting:
  dir: "coverage"

Upvotes: 5

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