template for automated unit tests with Mocha test runner and Chai assertion library

mocha_chai.test-template.js

/* eslint-env node, mocha */
import "babel-core/external-helpers";

let chai  = require('chai');
chai.should();
chai.expect();

import Point from '../src/oak-roots/Rect';

// calls each test
describe('Rect', () => {
  test_constructor();
  test_clone();
  test_set();
});

// this test demonstrates: 
//     nested describes and 
//     test results formatting options 
function test_isPointLike () {
  let testTypeStr,
      testTypeBool;
  beforeEach(() => {
    //pointThingNaN = { x: NaN, y: NaN };
    //pointThingUndefined = { x: undefined, y: undefined };
  });
  describe('\n--------\n#isPointLike\n', () => {
    describe('returns false if given...', () => {
      it('no argument', () => {
        (Point.isPointLike()).should.equal(false);
      });
    });
    describe('returns true if given...', () => {
      it('an instance of Point class\n', () => {
        point = new Point(100, 150);
        (Point.isPointLike(point)).should.equal(true);
      });
    });
  });
}



function test_constructor () {
  describe('#constructor()', () => {
    it('executes with two numerical arguments', () => {
        let point = new Point(30,40);
        chai.expect(point.left);
    });
    it('executes when either argument is NaN', () => {
        let point = new Point(NaN,40);
        chai.expect(point.left);
    });
    it('executes when invoked with neither x nor y parameter', () => {
        let point = new Point();
        (point.left).should.equal(0);
    });
  });
}


// demonstrates calling a function inside a test case
function test_right () {
  describe('#right', () => {
    let point;

    beforeEach(() => {
      point = new Point(10,20);
    });

    it('returns the x-cordinate', () => {

    });

    it('can not be changed', () => {
      (() => {point.left = 1000}).should.throw(Error);
    });
  });
}