Created
December 2, 2018 22:36
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import { async, TestBed } from '@angular/core/testing'; | |
import { UserComponent } from './user.component'; | |
import { UserService } from './user.service'; | |
describe('UserComponent', () => { | |
beforeEach(async(() => { | |
TestBed.configureTestingModule({ | |
declarations: [UserComponent] | |
}); | |
// compileComponents(); - compileComponent is not required when using weback. why? When application is | |
// created with CLI and uses Web pack. it uses different workflow and build process. | |
})); | |
describe(':', () => { | |
function setup() { | |
const fixture = TestBed.createComponent(UserComponent); | |
const component = fixture.componentInstance; | |
const userService = fixture.debugElement.injector.get(UserService); | |
return { fixture, component, userService }; | |
} | |
it('should create app component', () => { | |
const { component } = setup(); | |
expect(component).toBeTruthy(); | |
}); | |
it('should display logged-in user name', () => { | |
const { fixture, component, userService } = setup(); | |
const mockUser = { name: 'Mannie' }; | |
spyOn(userService, 'getUser').and.returnValue(mockUser); | |
fixture.detectChanges(); | |
const compile = fixture.debugElement.nativeElement; | |
const loggedInUser = compile.querySelector('p'); | |
expect(loggedInUser.textContent).toBe(' Welcome Mannie '); | |
}); | |
it('should display user is NOT logged in message', () => { | |
const { fixture, component, userService } = setup(); | |
spyOn(userService, 'getUser').and.returnValue(undefined); | |
fixture.detectChanges(); | |
const compile = fixture.debugElement.nativeElement; | |
const loggedInUser = compile.querySelector('p'); | |
expect(loggedInUser.textContent).toBe(' user is NOT logged In. '); | |
}); | |
}); | |
}); |
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