babel-plugin-transform-comment-to-assert

babel-plugin-transform-comment-to-assert

replace commented expressions with assert statements

Install

$ npm install --save babel-plugin-transform-comment-to-assert

Usage

import visitor from 'babel-plugin-transform-comment-to-assert'
import traverse from 'babel-traverse'
import generate from 'babel-generator'
import { transform } from 'babel-core'

function replace (code) {
  const { ast } = transform(code)
  traverse(ast, visitor().visitor)
  return generate(ast, {}, code).code.trim()
}

replace('1 //=> 1')
//=> 'assert.deepEqual(1, 1);'

Objects:

replace('a = { a: 1 }; a //=> {a: 1}')
//=> 'a = { a: 1 };assert.deepEqual(a, { a: 1 });'

Results of function calls:

replace("(() => 'foo')() //=> 'bar'")
//=> "assert.deepEqual((() => 'foo')(), 'bar');"

It also supports console.log:

replace("console.log('foo') //=> 'bar'")
//=> "console.log('foo');assert.deepEqual('foo', 'bar');"

License

MIT © Sigurd Fosseng