token.controller.spec.ts

import { TokenController } from "@api-token/token.controller";
import { TokenService } from "@api-token/services/token.service";
import { Test } from "@nestjs/testing";
import { HttpStatus, INestApplication } from "@nestjs/common";
import { Token, User } from "@entities";
import { getRepositoryToken } from "@nestjs/typeorm";
import { Repository } from "typeorm";

describe("TokenController", () => {
  let app: INestApplication;
  let tokenController: TokenController;
  let tokenRepository: Repository<Token>;
  beforeEach(async () => {
    const moduleRef = await Test.createTestingModule({
      providers: [
        {
          provide: getRepositoryToken(Token),
          useClass: Repository
        }
      ],
      controllers: [TokenController]
    })
      .useMocker((token) => {
        if (token === TokenService) {
          return { createToken: jest.fn().mockResolvedValue("VALID_TOKEN") };
        }
      })
      .compile();
    tokenController = moduleRef.get(TokenController);
    tokenRepository = moduleRef.get(getRepositoryToken(Token));
    tokenRepository.save = jest.fn().mockResolvedValue("VALID_TOKEN");
    app = moduleRef.createNestApplication();
    await app.init();
  });

  afterAll(async () => {
    await app.close();
  });

  describe("token_create", () => {
    it("ensure createToken OK", async () => {
      const result = {
        data: "VALID_TOKEN",
        status: HttpStatus.CREATED
      };
      const payload = {
        user: { id: "USER_ID" } as User
      };
      expect(await tokenController.createToken(payload)).toStrictEqual(result);
    });
  });
});