@vroskus/check-coverage-thresholds

Tool for comparing code coverage thresholds values in package.json agaist the generated json coverage summary report.

Installation

Call:

npm install -D @vroskus/check-coverage-thresholds

yarn add -D @vroskus/check-coverage-thresholds

Usage

1. Make sure that your test framework uses json-summary reporter and has already produced a coverage/coverage-summary.json. It is needed to get coverage results for analysis.
2. Ensure that you have some threshold values specified in package.json (you can start with 0). Example:

// package.json
...
  "jest": {
    "coverageThreshold": {
      "global": {
        "lines": 0,
        "statements": 0,
        "branches": 0,
        "functions": 0,
      }
    }
  }
...

3. Call check-coverage-thresholds after running tests, for example:

// package.json
...
"scripts": {
    "test": "jest",
    "posttest": "check-coverage-thresholds",
}
...

When the tool is called, it finds coverage information, compares results with stored threshold values, and exits with exit code 0 if threshold values are equal or higher, otherwise script exits with exit code 1 printing out not met values.