fast-sexpr/test/index.js

A lightweight s-expression parser for JavaScript.

const assert = require('assert');

const parse = require('../');

describe('Parser', function () {

  it('should parse symbols', function () {
    const sexpr = '(a bc d-ef :hij-k)';
    const list = parse(sexpr).pop();

    assert(list.length === 4, 'List does not contain correct number of elements.');
    assert(list[0] === 'a', 'Symbol \'a\' was not found.');
    assert(list[1] === 'bc', 'Symbol \'bc\' was not found.');
    assert(list[2] === 'd-ef', 'Symbol \'def\' was not found.');
    assert(list[3] === ':hij-k', 'Symbol \':hij-k\' was not found.');
  });

  it('should parse lists', function () {
    const sexpr = '(a (b (c)) d)';
    const list = parse(sexpr).pop();

    assert(list.length === 3, 'List does not contain correct number of elements.');
    assert(list[0] === 'a', 'Symbol \'a\' was not found');
    assert(list[1].length === 2, 'List does not contain correct number of elements.');
    assert(list[1][0] === 'b', 'Symbol \'b\' was not found');
    assert(list[1][1].length === 1, 'List does not contain correct number of elements.');
    assert(list[1][1][0] === 'c', 'Symbol \'c\' was not found');
    assert(list[2] === 'd', 'Symbol \'d\' was not found');
  });

  it('should parse strings', function () {
    const sexpr = '("" "abc" "def hij")';
    const list = parse(sexpr).pop();

    assert(list.length === 3, 'List does not contain correct number of elements.');
    assert(list[0] === '', 'String \'\' was not found.');
    assert(list[1] === 'abc', 'String \'abc\' was not found.');
    assert(list[2] === 'def hij', 'String \'def\' was not found.');
  });

});