测试

一些好的覆盖工具。

一些好的 JS 测试框架。

单一的测试每个概念

反例:

  1. const assert = require('assert');
  3. describe('MakeMomentJSGreatAgain', function() {
  4.   it('handles date boundaries', function() {
  5.     let date;
  7.     date = new MakeMomentJSGreatAgain('1/1/2015');
  8.     date.addDays(30);
  9.     date.shouldEqual('1/31/2015');
  11.     date = new MakeMomentJSGreatAgain('2/1/2016');
  12.     date.addDays(28);
  13.     assert.equal('02/29/2016', date);
  15.     date = new MakeMomentJSGreatAgain('2/1/2015');
  16.     date.addDays(28);
  17.     assert.equal('03/01/2015', date);
  18.   });
  19. });

正例:

  1. const assert = require('assert');
  3. describe('MakeMomentJSGreatAgain', function() {
  4.   it('handles 30-day months', function() {
  5.     let date = new MakeMomentJSGreatAgain('1/1/2015');
  6.     date.addDays(30);
  7.     date.shouldEqual('1/31/2015');
  8.   });
  10.   it('handles leap year', function() {
  11.     let date = new MakeMomentJSGreatAgain('2/1/2016');
  12.     date.addDays(28);
  13.     assert.equal('02/29/2016', date);
  14.   });
  16.   it('handles non-leap year', function() {
  17.     let date = new MakeMomentJSGreatAgain('2/1/2015');
  18.     date.addDays(28);
  19.     assert.equal('03/01/2015', date);
  20.   });
  21. });