npm-test

TLDR

Run tests

$ npm test

Run tests with arguments

$ npm test -- --coverage

Run tests silently

$ npm test --silent

Shorthand

$ npm t

npm test runs the "test" script defined in package.json. It's an alias for "npm run test" and is the conventional command for running a project's test suite.
Exit code 0 indicates success; non-zero indicates test failure.

PARAMETERS

Pass arguments to test script.

--silent

Reduce output.

--ignore-scripts

Don't run scripts.

PACKAGE.JSON

$ {
  "scripts": {
    "test": "jest",
    "test:watch": "jest --watch",
    "test:coverage": "jest --coverage"
  }
}

COMMON TEST SCRIPTS

$ # Jest
"test": "jest"

# Mocha
"test": "mocha"

# Vitest
"test": "vitest"

# TAP
"test": "tap test/*.js"

CAVEATS

Requires test script to be defined. Default exits with error if no script. Use npm run test:name for custom test scripts.

HISTORY

npm test became the standard test command for Node.js projects, integrated into CI/CD pipelines universally.