jest-runner-es-check

This is a Jest runner for es-check.

Usage

Install

Install jest(it needs Jest 21+) and jest-runner-es-check

yarn add --dev jest jest-runner-es-check

# or with NPM

npm install --save-dev jest jest-runner-es-check

Add it to your Jest config

Standalone

In your package.json

{
  "jest": {
    "runner": "jest-runner-es-check",
    "displayName": "es-check",
    "testMatch": ["<rootDir>/dist/**/*.js"]
  }
}

Or in jest.config.js

module.exports = {
  runner: 'jest-runner-es-check',
  displayName: 'es-check',
  testMatch: ['<rootDir>/dist/**/*.js'],
};

Alongside other runners

It is recommended to use the projects configuration option to run multiple Jest runners simultaneously.

If you are using Jest <22.0.5, you can use multiple Jest configuration files and supply the paths to those files in the projects option. For example:

// jest-test.config.js
module.exports = {
  // your Jest test options
  displayName: 'test',
};

// jest-es-check.config.js
module.exports = {
  // your jest-runner-es-check options
  runner: 'jest-runner-es-check',
  displayName: 'es-check',
  testMatch: ['<rootDir>/dist/**/*.js'],
};

In your package.json:

{
  "jest": {
    "projects": [
      "<rootDir>/jest-test.config.js",
      "<rootDir>/jest-es-check.config.js"
    ]
  }
}

Or in jest.config.js:

module.exports = {
  projects: [
    '<rootDir>/jest-test.config.js',
    '<rootDir>/jest-es-check.config.js',
  ],
};

If you are using Jest >=22.0.5, you can supply an array of project configuration objects instead. In your package.json:

{
  "jest": {
    "projects": [
      {
        "displayName": "test"
      },
      {
        "runner": "jest-runner-es-check",
        "displayName": "es-check",
        "testMatch": ["<rootDir>/dist/**/*.js"]
      }
    ]
  }
}

Or in jest.config.js:

module.exports = {
  projects: [
    {
      displayName: 'test',
    },
    {
      runner: 'jest-runner-es-check',
      displayName: 'es-check',
      testMatch: ['<rootDir>/dist/**/*.js'],
    },
  ],
};

Options

This project uses same options as the original package, and will read .escheckrc in the root directory, if present. However, it's also easily configurable via jest's options:

// package.json
"jest": {
  "runner": "jest-runner-es-check",
  "displayName": "es-check",
  "testEnvironmentOptions": {
    "ecmaVersion": "es5"
  },
  "testMatch": [
    "<rootDir>/dist/**/*.js"
  ]
}

All available options:

• ecmaVersion: The ECMA version to check against. One of:
  • es3
  • es4
  • es5
  • es6
  • es2015
  • es7
  • es2016
  • es8
  • es2017
  • es9
  • es2018
  • es10
  • es2019
• module Set to true if files are using module syntax.
• allowHashBang Set to true if hashbangs should be allowed.

Example

Check out the example to see it in action.