Homarr/apps/nestjs/src/app.controller.spec.ts

/* eslint-disable @typescript-eslint/unbound-method */
import type { TestingModule } from "@nestjs/testing";
import { Test } from "@nestjs/testing";
import { beforeEach, describe, expect, it, vitest } from "vitest";

import { AppController } from "./app.controller";
import { AppService } from "./app.service";
import { DatabaseService } from "./db/database.service";

describe("AppController", () => {
  let appController: AppController;
  let appService: AppService;

  beforeEach(async () => {
    const app: TestingModule = await Test.createTestingModule({
      controllers: [AppController],
      providers: [AppService, DatabaseService],
    }).compile();

    appController = app.get<AppController>(AppController);
    appService = app.get<AppService>(AppService);
  });

  describe("root", () => {
    it('should return "Hello World!"', async () => {
      // arrange
      vitest
        .spyOn(appService, "getHello")
        .mockReturnValueOnce(Promise.resolve("ABC"));

      // act
      const a = await appController.getHello();

      // assert
      expect(a).toBe("ABC");
      expect(appService.getHello).toHaveBeenCalledTimes(1);
    });
  });
});