import { of } from 'rxjs' ; import { Message } from '../models/message' ; const dummyMessages = [ { id : 0 , text : 'Hello there' , } , { id : 1 , text : 'Hi' , } , { id : 2 , text : "How're you doing?" , } , { id : 3 , text : 'Perfectly fine. How are you ?' , } , ] ; export class MockChatService { getMessages ( ) { return of ( this . processMessages ( dummyMessages ) ) ; } processMessages ( messages ) { return messages ; } }