jasmine

Java 8 Stream API学习总结

假如想象 提交于 2020-08-05 01:47:29
Java 8 API添加了一个新的抽象称为流Stream,可以让你以一种声明的方式处理数据。Stream API可以极大提高Java程序员的生产力,让程序员写出高效率、干净、简洁的代码。这种风格将要处理的元素集合看作一种流, 流在管道中传输, 并且可以在管道的节点上进行处理, 比如筛选, 排序,聚合等。元素流在管道中经过中间操作(intermediate operation)的处理,最后由最终操作(terminal operation)得到前面处理的结果。 这一次为什么要系统性的总结一下 Java 8 Stream API 呢?说得简单点,我们先不论性能,我们就是为了 装x ,而且要让这个 x 装得再优秀一些,仅此而已! Stream基础知识 流程 创建流 → 流的中间操作 → 流的最终操作 创建流 我们需要把哪些元素放入流中,常见的api有: // 使用List创建流 list.stream() // 使用一个或多个元素创建流 Stream.of(T value) Stream.of(T... values) // 使用数组创建流 Arrays.stream(T[] array) // 创建一个空流 Stream.empty() // 两个流合并 Stream.concat(Stream<? extends T> a, Stream<? extends T> b) //

How can i simulate browser focus when testing using angular and jasmine?

蹲街弑〆低调 提交于 2020-08-01 11:27:13
问题 I am trying to write a unit test that checks whether or not the effect of a focus event takes place. My actual test case is more complicated, but I have created a minimal reproduction with the following code: it('testing input focus', async(() => { let showDiv = false; const template = `<div *ngIf="shouldShow" class='hidden-div'> SHOW ME WHAT YOU GOT </div> <input (focus)="shouldShow = !shouldShow" name="input">`; buildTestComponent(template, {shouldShow: showDiv}).then((fixture) => { fixture

为 React 开发人员推荐 8 个测试工具、库和框架

时光总嘲笑我的痴心妄想 提交于 2020-07-29 00:54:12
云栖号资讯:【 点击查看更多行业资讯 】 在这里您可以找到不同行业的第一手的上云资讯,还在等什么,快来! 很多开发人员都很喜欢 React,在前端领域它也是很流行的 UI 库了。我们也知道应用要交付生产环境前是必须要经过完善的测试的,而测试应用程序时,有趁手的工具能极大减轻开发人员的负担、提升测试效率并减少测试漏洞。正所谓"工欲善其事,必先利其器",这篇文章就为大家推荐 8 个好用的测试工具、库和框架。本文编译自 GeeksforGeeks 网站。 如果你是前端工程师,日常工作中经常会用到 React 库,那么你手里可能已经有一些用来测试 React 应用的工具或框架了。许多开发人员会使用 Jest、Enzyme 或其他一些流行的工具和库来测试 React 应用组件。但毕竟萝卜青菜各有所爱,开源生态系统中又有大量用于 React 应用的测试框架和工具,所以很多人(尤其是新人)很容易在这个问题上犯选择困难症。下面我们会介绍一些流行好用的 React 测试框架和库,供大家参考。 1.Jest Jest 是最受欢迎的测试框架,每周下载超过 1600 万次。它是由 Facebook 创建和维护的。FB 团队用它来测试所有 JavaScript 代码,也包括 React 应用程序。Airbnb、Uber、Intuit 等公司的团队也在用它。Jest 附带了测试运行器和断言功能。就算是刚刚接触

Jasmine Angular Mock component attribute

旧时模样 提交于 2020-07-23 08:05:12
问题 Running command: ng test --codeCoverage=true --progress=false --watch=false Error message: TypeError: Cannot read property 'substring' of undefined NgOnInit of the component private serv: ExtratosMensaisService, ngOnInit(): void { const serventia: Serventia = this.serv.getServentiaSelecionada(); const competencia: Competencia = this.serv.getCompetenciaSelecionada(); const titularidade = serventia.titularidade.substring(0, 1).toUpperCase(); } The service file method: getServentiaSelecionada():

Jasmine Angular Mock component attribute

删除回忆录丶 提交于 2020-07-23 08:02:37
问题 Running command: ng test --codeCoverage=true --progress=false --watch=false Error message: TypeError: Cannot read property 'substring' of undefined NgOnInit of the component private serv: ExtratosMensaisService, ngOnInit(): void { const serventia: Serventia = this.serv.getServentiaSelecionada(); const competencia: Competencia = this.serv.getCompetenciaSelecionada(); const titularidade = serventia.titularidade.substring(0, 1).toUpperCase(); } The service file method: getServentiaSelecionada():

Jasmine Angular Mock component attribute

两盒软妹~` 提交于 2020-07-23 08:00:10
问题 Running command: ng test --codeCoverage=true --progress=false --watch=false Error message: TypeError: Cannot read property 'substring' of undefined NgOnInit of the component private serv: ExtratosMensaisService, ngOnInit(): void { const serventia: Serventia = this.serv.getServentiaSelecionada(); const competencia: Competencia = this.serv.getCompetenciaSelecionada(); const titularidade = serventia.titularidade.substring(0, 1).toUpperCase(); } The service file method: getServentiaSelecionada():

Running Jasmine tests on Azure DevOps as part of automated build process

徘徊边缘 提交于 2020-07-20 05:57:20
问题 Given the build has an Angular app as part of it, there are Jasmine tests in there. What do I have to do to get those test results published as part of the build and better yet, gate the build result on successful execution of all Jasmine tests? 回答1: You can do this through the following script and tasks: run ng test publish test results with PublishTestResults task publish code coverage results with PublishCodeCoverageResults task In the Azure Pipelines YAML file, this could look as follows:

HttpTestingController expectOne not working when actual request is nested within a promise

丶灬走出姿态 提交于 2020-07-18 14:36:13
问题 I am trying to unit test a service which gets a value from another service (returns a Promise) then execute http GET request. I am using HttpTestingController from @angular/common/http/testing to mock the http request. Here is the test and prod code : tested.service.spec.ts it('should get base url from indexedDb then execute http get request', (async () => { fakeParametresService.getBaseUrl.and.returnValue(Promise.resolve({valeur: 'http://host:port'})); testedService.get<any>('/endpoint')

Jasmine spyOn with specific arguments

耗尽温柔 提交于 2020-07-17 09:28:13
问题 Suppose I have spyOn($cookieStore,'get').and.returnValue('abc'); This is too general for my use case. Anytime we call $cookieStore.get('someValue') --> returns 'abc' $cookieStore.get('anotherValue') --> returns 'abc' I want to setup a spyOn so I get different returns based on the argument: $cookieStore.get('someValue') --> returns 'someabc' $cookieStore.get('anotherValue') --> returns 'anotherabc' Any suggestions? 回答1: You can use callFake: spyOn($cookieStore,'get').and.callFake(function(arg)

Spec has no expectation console error although expect is present

人盡茶涼 提交于 2020-07-09 05:25:17
问题 I have the spec that has to expect still it says there are no expectations... it('should click on yes button of technician and check save&continue functionality', () => { const saveAndContinue = fixture.debugElement.query(By.css(saveContinueBtn)).nativeElement; saveAndContinue.click(); fixture.detectChanges(); fixture.whenStable().then(() => { const spy = spyOn(component, 'isSaveAndContinueClicked').and.callThrough(); expect(component).toBeDefined(); expect(spy); component