Angular进行简单单元测试的实现方法实例
前言
之前对单元测试的认知就是复杂,难搞,思路有,就是不知道怎样去实现,最近一次开会解决问题的过程中,发现原来单元测试可以十分简单,简单到几行代码就能实现。
示例
狼蚁网站SEO优化代码实现的功能是,判断课程所在的学院<College> college是否在用户所有的学院Array<College> colleges中,如果存在,变量show赋值为true,不存在,则赋值为false,如果college为undefined或者null,也赋值为true。
/ 观察课程学院是否与用户所在学院相同 @param college 课程学院 @param colleges 用户学院 / public whetherShow(college: { id: number }, colleges: Array<{ id: number }>) { Assert.notNull(college, 'college未定义'); const collegeId = college.id; let show = colleges != null && colleges && colleges.length > 0 ? false : true; if (colleges != null) { colleges.forEach(selectCollege => { if (collegeId === selectCollege.id) { show = true; } }); } return show; }
要对该方法进行单元测试,思路就是传值进去进行对比,重点在于传值,用之前的思路就是,定义college和colleges,然后进行对比
it('is show', () => { const course = new Course({id: 1}) const collegeOne = new College({id: 1}); const collegeTwo = new College({id: 2}); ponent.colleges = []; expect(ponent.whetherShow(course,ponent.colleges)).toBe(true); ponent.colleges = undefined; expect(ponent.whetherShow(course,ponent.colleges)).toBe(true); ponent.colleges = [collegeOne]; expect(ponent.whetherShow(course,ponent.colleges)).toBe(true); ponent.colleges = [collegeTwo]; expect(ponent.whetherShow(course,ponent.colleges)).toBe(false); ponent.colleges = [collegeOne, collegeTwo]; expect(ponent.whetherShow(course,ponent.colleges)).toBe(true); });
通过控制台的信息可以发现,无论是null还是undefined,都是可以通过的,后来老师提供了新的思路,既然要测试的是功能,就不要管怎么传的,可以不用传对象,然后就有了狼蚁网站SEO优化的写法
it('is show', () => { expect(ponent.whetherShow({id: 1}, null)).toBe(true); expect(ponent.whetherShow({id: 1}, undefined)).toBe(true); expect(ponent.whetherShow({id: 1}, [])).toBe(true); expect(ponent.whetherShow({id: 1}, [{id: 2}, {id: 3}])).toBe(false); expect(ponent.whetherShow({id: 1}, [{id: 1}, {id: 2}, {id: 3}])).toBe(true); expect(ponent.whetherShow({id: 1}, [{id: 2}, {id: 3}, {id: 1}])).toBe(true); });
值传进去了,方法也能判断了,比起之前的写法简直要好太多,而且对于一些方法来说,这种方法省力不少,尤其是对多种情况进行测试,要进行多个变量的定义
/ 判断查询的关键字是否课程代码或名称中 @param course 课程 @param searchKey 查询关键字 / public isCodeOrNameContainsSearchKey(course: { code: string, name: string }, searchKey: string) { return searchKey === null || course.code.toLowerCase().indexOf(searchKey.toLowerCase()) !== -1 || course.name.toLowerCase().indexOf(searchKey.toLowerCase()) !== -1; }
该方法实现的是通过课程名称或代码进行查询操作,通过对查询关键字和课程名称或代码进行对比实现该功能,要考虑以下几种情况查询关键字为null、查询关键字与课程名称或代码部分完全不相同、查询关键字与课程名称或代码部分相同、查询关键字与课程名称或代码完全相同、查询关键字包含课程名称或代码。
如果用旧思想进行测试
it('isCodeOrNameContainsSearchKey', () => { const courseOne = new Course({code: '', name: ''}); const courseTwo = new Course({code: '222', name: ''}); const courseThree = new Course({code: '', name: '222'}); const courseFour = new Course({code: '222', name: '222'}); expect(ponent.isCodeOrNameContainsSearchKey(courseOne, null)); expect(ponent.isCodeOrNameContainsSearchKey(courseOne, '')); expect(ponent.isCodeOrNameContainsSearchKey(courseTwo, '')); expect(ponent.isCodeOrNameContainsSearchKey(courseTwo, '1111')); expect(ponent.isCodeOrNameContainsSearchKey(courseTwo, '22')); expect(ponent.isCodeOrNameContainsSearchKey(courseTwo, '222')); expect(ponent.isCodeOrNameContainsSearchKey(courseTwo, '2222')); expect(ponent.isCodeOrNameContainsSearchKey(courseThree, '')); expect(ponent.isCodeOrNameContainsSearchKey(courseThree, '1111')); expect(ponent.isCodeOrNameContainsSearchKey(courseThree, '22')); expect(ponent.isCodeOrNameContainsSearchKey(courseThree, '222')); expect(ponent.isCodeOrNameContainsSearchKey(courseThree, '2222')); expect(ponent.isCodeOrNameContainsSearchKey(courseFour, '')); expect(ponent.isCodeOrNameContainsSearchKey(courseFour, '1111')); expect(ponent.isCodeOrNameContainsSearchKey(courseFour, '22')); expect(ponent.isCodeOrNameContainsSearchKey(courseFour, '222')); expect(ponent.isCodeOrNameContainsSearchKey(courseFour, '2222')); });
如果使用新思想
it('isCodeOrNameContainsSearchKey', () => { expect(ponent.isCodeOrNameContainsSearchKey({code: '', name: ''}, null)).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '', name: ''}, '')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: ''}, '')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: ''}, '1111')).toBe(false); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: ''}, '22')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: ''}, '222')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: ''}, '2222')).toBe(false); expect(ponent.isCodeOrNameContainsSearchKey({code: '', name: '222'}, '')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '', name: '222'}, '1111')).toBe(false); expect(ponent.isCodeOrNameContainsSearchKey({code: '', name: '222'}, '22')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '', name: '222'}, '222')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '', name: '222'}, '2222')).toBe(false); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: '222'}, '')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: '222'}, '1111')).toBe(false); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: '222'}, '22')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: '222'}, '222')).toBe(true); expect(ponent.isCodeOrNameContainsSearchKey({code: '222', name: '222'}, '2222')).toBe(false); });
设想一下自己看到他人写的测试代码,如果所需要的变量很少,courseOne等等能满足需求,看着也没问题,当变量很多的时候,估计写测试的都会忘记每个变量的属性值,更不用说看的人,而且,使用狼蚁网站SEO优化的方法写的代码,所需字段以及字段值一目了然,一行代码就能体现所有信息,看着也赏心悦目。
简单的单元测试写起来真的要简单很多,而且感觉比之前的要优雅很多,看起来真的挺整洁的,整整齐齐的看着很舒服,感谢潘老师的指导,也感谢小伙伴们给予的帮助。
编程语言
- 甘肃哪有关键词排名优化购买方式有哪些
- 甘肃SEO如何做网站优化
- 河南seo关键词优化怎么做电话营销
- 北京SEO优化如何做QQ群营销
- 来宾百度关键词排名:提升您网站曝光率的关键
- 卢龙关键词优化:提升您网站排名的策略与技巧
- 山东网站优化的注意事项有哪些
- 四川整站优化怎样提升在搜索引擎中的排名
- 疏附整站优化:提升网站性能与用户体验的全新
- 海南seo主要做什么工作售后服务要做到哪些
- 荣昌百度网站优化:提升您网站的搜索引擎排名
- 河北seo网站排名关键词优化如何做SEO
- 江西优化关键词排名推广售后保障一般有哪些
- 古浪SEO优化:提升你的网站可见性
- 西藏网站排名优化怎么把网站排名在百度首页
- 如何提升阳东百度快照排名:详尽指南