supertest e2e with nestjs: request is not a function - node.js

Question

I try to introduce e2e tests for my simple NestJS backend services. I am providing a custom userService and a custom UserRepository mocked with sinon.
This is my user.e2e-spec.ts file:
import * as request from 'supertest';
import * as sinon from 'sinon';
import { Test } from '#nestjs/testing';
import { INestApplication } from '#nestjs/common';
import { UserService } from '../../src/user/user.service';
import { getRepositoryToken } from '#nestjs/typeorm';
import { User } from '../../src/user/user.entity';
import { TestUtil } from '../../src/utils/TestUtil';
import { createFakeUser } from '../../src/user/test/userTestUtil';
let sandbox: sinon.SinonSandbox;
let testUtil;
describe('User', () => {
let app: INestApplication;
const fakeUser = createFakeUser();
const userService = { findOne: () => fakeUser };
beforeAll(async () => {
sandbox = sinon.createSandbox();
testUtil = new TestUtil(sandbox);
const module = await Test.createTestingModule({
providers: [
{
provide: UserService,
useValue: userService,
},
{
provide: getRepositoryToken(User),
useValue: testUtil.getMockRepository().object,
},
],
}).compile();
app = module.createNestApplication();
await app.init();
});
it(`/GET user`, () => {
return request(app.getHttpServer())
.get('/user/:id')
.expect(200)
.expect({
data: userService.findOne(),
});
});
afterAll(async () => {
await app.close();
});
});
and this is my user.controller.ts:
import { ApiBearerAuth, ApiUseTags } from '#nestjs/swagger';
import { Controller, Get, Param } from '#nestjs/common';
import { UserService } from './user.service';
import { User } from './user.entity';
#ApiUseTags('Users')
#ApiBearerAuth()
#Controller('user')
export class UserController {
constructor(private readonly userService: UserService) {}
#Get('/:id')
findOne(#Param('id') id: number): Promise<User> {
return this.userService.find(id);
}
}
I wrote a bunch of Unit tests with the same pattern and it works. Have no clue what is wrong with this e2e supertest.
Thanks for your help!
UPDATE:
This is the error message I get:
TypeError: request is not a function
at Object.it (/Users/florian/Development/Houzy/nestjs-backend/e2e/user/user.e2e-spec.ts:40:16)
at Object.asyncFn (/Users/florian/Development/Houzy/nestjs-backend/node_modules/jest-jasmine2/build/jasmine_async.js:124:345)
at resolve (/Users/florian/Development/Houzy/nestjs-backend/node_modules/jest-jasmine2/build/queue_runner.js:46:12)
at new Promise (<anonymous>)
at mapper (/Users/florian/Development/Houzy/nestjs-backend/node_modules/jest-jasmine2/build/queue_runner.js:34:499)
at promise.then (/Users/florian/Development/Houzy/nestjs-backend/node_modules/jest-jasmine2/build/queue_runner.js:74:39)
at <anonymous>

Answer 1

Change import of request to:
import request from 'supertest';
In your test, replace :id with number:
it(`/GET user`, () => {
return request(app.getHttpServer())
.get('/user/1') // pass here id, not a string
.expect(200)
.expect({
data: userService.findOne(),
});
});
And in controller:
#Get('/:id')
findOne(#Param('id') id: number): Promise<User> {
return this.userService.find(id);
}
This should work now.