在角度CLI项目中放置测试助手的位置

Question

我们有一个Angular CLI项目.我们的spec.ts文件位于不同的位置,通过Karma进行测试,没有任何具体内容.

我们希望使用官方Angular文档中描述的一些辅助类来帮助我们跨应用程序测试各种事物.例如,官方文档位于testing/index.ts文件中,用于模拟单击处理.然后它可用于所有测试.

问题是doc中的项目使用SystemJS,我想在Angular CLI项目结构中重用这些帮助器.

在Angular CLI项目结构中,有没有办法加载这种文件并在我们的spec.ts文件中提供它们的功能？

Karma.conf提到了该src/test.ts文件,但我不知道它是否适合这些存根和辅助函数.

文件示例

以下是doc和Angular CLI生成的karma.conf.js中的文件.

Angular.io doc testing/index.ts文件:

import { DebugElement }           from '@angular/core';
import { tick, ComponentFixture } from '@angular/core/testing';

export * from './jasmine-matchers';
export * from './router-stubs';

///// Short utilities /////

/** Wait a tick, then detect changes */
export function advance(f: ComponentFixture<any>): void {
  tick();
  f.detectChanges();
}

/**
 * Create custom DOM event the old fashioned way
 *
 * https://developer.mozilla.org/en-US/docs/Web/API/Event/initEvent
 * Although officially deprecated, some browsers (phantom) don't accept the preferred "new Event(eventName)"
 */
export function newEvent(eventName: string, bubbles = false, cancelable = false) {
  let evt = document.createEvent('CustomEvent');  // MUST be 'CustomEvent'
  evt.initCustomEvent(eventName, bubbles, cancelable, null);
  return evt;
}

// See https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button
/** Button events to pass to `DebugElement.triggerEventHandler` for RouterLink event handler */
export const ButtonClickEvents = {
   left:  { button: 0 },
   right: { button: 2 }
};

/** Simulate element click. Defaults to mouse left-button click event. */
export function click(el: DebugElement | HTMLElement, eventObj: any = ButtonClickEvents.left): void {
  if (el instanceof HTMLElement) {
    el.click();
  } else {
    el.triggerEventHandler('click', eventObj);
  }
}

testing/router-stubs.ts 文件:

 // export for convenience.
export { ActivatedRoute, Router, RouterLink, RouterOutlet} from '@angular/router';

import { Component, Directive, Injectable, Input } from '@angular/core';
import { NavigationExtras } from '@angular/router';

@Directive({
  selector: '[routerLink]',
  host: {
    '(click)': 'onClick()'
  }
})
export class RouterLinkStubDirective {
  @Input('routerLink') linkParams: any;
  navigatedTo: any = null;

  onClick() {
    this.navigatedTo = this.linkParams;
  }
}

@Component({selector: 'router-outlet', template: ''})
export class RouterOutletStubComponent { }

@Injectable()
export class RouterStub {
  navigate(commands: any[], extras?: NavigationExtras) { }
}


// Only implements params and part of snapshot.params
import { BehaviorSubject } from 'rxjs/BehaviorSubject';

@Injectable()
export class ActivatedRouteStub {

  // ActivatedRoute.params is Observable
  private subject = new BehaviorSubject(this.testParams);
  params = this.subject.asObservable();

  // Test parameters
  private _testParams: {};
  get testParams() { return this._testParams; }
  set testParams(params: {}) {
    this._testParams = params;
    this.subject.next(params);
  }

  // ActivatedRoute.snapshot.params
  get snapshot() {
    return { params: this.testParams };
  }
}

Angular CLI karma.conf.js文件

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular/cli'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular/cli/plugins/karma')
    ],
    client:{
      clearContext: false // leave Jasmine Spec Runner output visible in browser
    },
    files: [
      { pattern: './src/test.ts', watched: false }
    ],
    preprocessors: {
      './src/test.ts': ['@angular/cli']
    },
    mime: {
      'text/x-typescript': ['ts','tsx']
    },
    coverageIstanbulReporter: {
      reports: [ 'html', 'lcovonly' ],
      fixWebpackSourcePaths: true
    },
    angularCli: {
      environment: 'dev'
    },
    reporters: config.angularCli && config.angularCli.codeCoverage
              ? ['progress', 'coverage-istanbul']
              : ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false
  });
};

Answer 1

您需要在 test.ts 中添加引用testing/*.ts 文件的导入语句。

我有一个名为 test/index.ts 的文件，这就是我将其导入 test.ts 的方式

import { } from './testing';