mathjs/test/function/construction/parser.test.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

var assert = require('assert'),
    math = require('../../../index'),
    Parser = math.expression.Parser;

describe('parser', function() {

  it('should create a parser', function() {
    var parser = math.parser();

    assert(parser instanceof Parser);
  });

});