Created
January 5, 2021 21:23
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app.controller.spec.ts
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| import { Test, TestingModule } from '@nestjs/testing'; | |
| import { AppController } from './app.controller'; | |
| import { AppService } from './app.service'; | |
| import { StudentService } from './student/student.service'; | |
| describe('AppController', () => { | |
| let appController: AppController; | |
| let spyService: StudentService; | |
| beforeEach(async () => { | |
| const ApiServiceProvider = { | |
| provide: StudentService, | |
| useFactory: () => ({ | |
| getGpa: jest.fn(() => 4.5), | |
| }), | |
| }; | |
| const app: TestingModule = await Test.createTestingModule({ | |
| controllers: [AppController], | |
| providers: [AppService, ApiServiceProvider], | |
| }).compile(); | |
| appController = app.get<AppController>(AppController); | |
| spyService = app.get<StudentService>(StudentService); | |
| }); | |
| describe('root', () => { | |
| it('should return "Hello World!"', () => { | |
| expect(appController.getHello()).toBe('Hello World!'); | |
| }); | |
| }); | |
| describe('getGPA', () => { | |
| it('should call getGPA for a student', async () => { | |
| const firstName = 'Joe'; | |
| const secondName = 'Foo'; | |
| appController.getStudentGpa(firstName, secondName); | |
| expect(spyService.getGpa).toHaveBeenCalled(); | |
| }); | |
| }); | |
| describe('getGPA', () => { | |
| it('should retrieve getGPA for a student', async () => { | |
| const firstName = 'Joe'; | |
| const secondName = 'Foo'; | |
| expect(spyService.getGpa(firstName, secondName)).toBe(4.5); | |
| }); | |
| }); | |
| }); |
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