https://github.com/harrysolovay/babel-microtest

🔬Framework-agnostic, minimal testing for Babel 7 plugins
https://github.com/harrysolovay/babel-microtest

babel compiler plugin testing transform

Last synced: about 2 months ago
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🔬Framework-agnostic, minimal testing for Babel 7 plugins

• Host: GitHub
• URL: https://github.com/harrysolovay/babel-microtest
• Owner: harrysolovay
• Created: 2019-02-04T20:46:38.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-02-05T03:07:53.000Z (over 7 years ago)
• Last Synced: 2025-02-16T10:33:52.318Z (over 1 year ago)
• Topics: babel, compiler, plugin, testing, transform
• Language: JavaScript
• Homepage:
• Size: 183 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# babel-microtest

[![Build Status](https://travis-ci.org/harrysolovay/babel-microtest.svg?branch=master)](https://travis-ci.org/harrysolovay/babel-microtest)

`babel-microtest` is a way of checking that your Babel 7 presets/plugins transform code as expected. It was created to solve **2 key problems** relating to plugin development:

1. interoperability with any testing framework

2. code comparison (avoiding test failure over negligible differences such as semicolons and line breaks)

## Installation

```shell

$ npm i -D babel-microtest

```

## Usage

`my-test.js`

```js

// use whatever your favorite testing framework (this demo uses Ava)

import test from 'ava'

// import the lib

import createTest from 'babel-microtest'

// test options (in this case, we're gonna test 'babel-plugin-implicit-return'):

const options = {

  plugins: ['implicit-return'], // or import and pass the plugin directly

}

// create the test instance

const implicitReturnTest = createTest(options)

// using Ava

test('implicit return test title', t => {

  implicitReturnTest(

    {

      source: `

        function add(a, b) {

          a + b

        }

      `,

      expected: `

        function add(a, b) {

          return a + b

        }

      `,

    },

    t,

  )

})

// ^ we pass `t` as the 2nd argument, but could substitute it with any

// object containing the testing framework's pass and fail fns

```