sexp-template/test/helpers.js

const Env = require('../src/env')
const Evaluator = require('../src/evaluator')
const Lexer = require('../src/lexer')
const Parser = require('../src/parser')

const scan = source => {
  const lexer = new Lexer()
  return lexer.scan(source)
}

const parse = source => {
  const parser = new Parser()
  return parser.parse(scan(source))
}

const evaluate = source => {
  const evaluator = new Evaluator()
  return evaluator.eval(parse(source), new Env())
}

module.exports = {
  evaluate: evaluate,
  parse: parse,
  scan: scan,
}

console.log(evaluate('(+ 1 2)'))