mathjs/test/error/index.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');
var error = require('../../lib/error/index');

describe('index.js', function () {

  it('should contain error factory functions', function () {
    assert(Array.isArray(error));
    assert(error[0].name, 'ArgumentsError');
    assert(error[1].name, 'DimensionError');
    assert(error[2].name, 'IndexError');
  });

});