Yixi/ToDoService

Angular step by step

Practices

1. Add router for each component
2. Add UT for router
3. Call real webapi instead of local data
4. keep all test pass in todo.service.spec.ts

tips:

How to define jasmine spy

let httpClientSpy: { get: jasmine.Spy }; 

How to create jasmine spy

httpClientSpy = jasmine.createSpyObj('HttpClient', ['get']);

How to response response:

function asyncData<T>(data: T) {
  return defer(() => Promise.resolve(data));
}
  function asyncError<T>(errorObject: any) {
    return defer(() => Promise.reject(errorObject));
  }

Create HttpErrorResponse

const errorResponse = new HttpErrorResponse({
      error: 'test 404 error',
      status: 404, statusText: 'Not Found'
    });

How to create HttpHeaders

import { HttpHeaders } from '@angular/common/http';

----
const httpOptions = {
  headers: new HttpHeaders({
    'Content-Type': 'application/json'
  })
}

Reference:

• https://angular.io/guide/testing-services#testing-http-services