messages.component.spec.ts

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { NO_ERRORS_SCHEMA } from '@angular/core';
import { MessageService } from '../message.service';
import { MessagesComponent } from './messages.component';
describe('MessagesComponent', () => {
  let component: MessagesComponent;
  let fixture: ComponentFixture<MessagesComponent>;
  beforeEach(() => {
    const messageServiceStub = () => ({});
    TestBed.configureTestingModule({
      schemas: [NO_ERRORS_SCHEMA],
      declarations: [MessagesComponent],
      providers: [{ provide: MessageService, useFactory: messageServiceStub }]
    });
    fixture = TestBed.createComponent(MessagesComponent);
    component = fixture.componentInstance;
  });
  it('can load instance', () => {
    expect(component).toBeTruthy();
  });
});