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app.e2e-spec.ts
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| import { Test, TestingModule } from '@nestjs/testing'; | |
| import * as request from 'supertest'; | |
| import { AppModule } from '../app.module'; | |
| import { INestApplication, HttpService, HttpModule } from '@nestjs/common'; | |
| import { ApiService } from '../api/api.service'; | |
| import { StudentService } from '../student/student.service'; | |
| import { AxiosResponse } from 'axios'; | |
| import { of } from 'rxjs'; | |
| describe('AppController (e2e)', () => { | |
| let app: INestApplication; | |
| let httpService: HttpService; | |
| beforeAll(async () => { | |
| const mockAppModule: TestingModule = await Test.createTestingModule({ | |
| imports: [AppModule, HttpModule], | |
| providers: [ApiService, StudentService], | |
| }).compile(); | |
| app = mockAppModule.createNestApplication(); | |
| httpService = mockAppModule.get<HttpService>(HttpService); | |
| await app.init(); | |
| }); | |
| it('GET student GPA if API finds the student', async () => { | |
| const result: AxiosResponse = { | |
| data: { | |
| name: 'Jane Doe', | |
| grades: [3.7, 3.8, 3.9, 4.0, 3.6], | |
| }, | |
| status: 200, | |
| statusText: 'OK', | |
| headers: {}, | |
| config: {}, | |
| }; | |
| jest.spyOn(httpService, 'get').mockImplementationOnce(() => of(result)); | |
| const expectedGpaString = '3.8'; | |
| const response = await request(app.getHttpServer()) | |
| .get('/student/gpa?firstName=Jane&lastName=Doe') | |
| .expect(200); | |
| expect(response.text).toEqual(expectedGpaString); | |
| }); | |
| it('throws error if GET request does not include student name', async () => { | |
| return await request(app.getHttpServer()) | |
| .get('/student/gpa?firstName=&lastName=') | |
| .expect(400); | |
| }); | |
| it('throws error if API cannot find the student', async () => { | |
| const result: AxiosResponse = { | |
| data: {}, | |
| status: 404, | |
| statusText: '', | |
| headers: {}, | |
| config: {}, | |
| }; | |
| jest.spyOn(httpService, 'get').mockImplementationOnce(() => of(result)); | |
| return await request(app.getHttpServer()) | |
| .get('/student/gpa?firstName=Anna&lastName=Julia') | |
| .expect(404); | |
| }); | |
| it('throws error if student does not have grades assigned', async () => { | |
| const result: AxiosResponse = { | |
| data: { name: 'Davy Jones' }, | |
| status: 200, | |
| statusText: '', | |
| headers: {}, | |
| config: {}, | |
| }; | |
| jest.spyOn(httpService, 'get').mockImplementationOnce(() => of(result)); | |
| return await request(app.getHttpServer()) | |
| .get('/student/gpa?firstName=Davy&lastName=Jones') | |
| .expect(404); | |
| }); | |
| }); |
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