moraworld/apps/api/src/health/health.controller.spec.ts

import { Test, TestingModule } from "@nestjs/testing";
import { HealthController } from "./health.controller";
import { PrismaService } from "../prisma/prisma.service";

describe("HealthController", () => {
  let controller: HealthController;
  let prismaService: { client: { $queryRaw: jest.Mock } };

  beforeEach(async () => {
    prismaService = {
      client: {
        $queryRaw: jest.fn().mockResolvedValue([{ "?column?": 1 }]),
      },
    };

    const module: TestingModule = await Test.createTestingModule({
      controllers: [HealthController],
      providers: [
        {
          provide: PrismaService,
          useValue: prismaService,
        },
      ],
    }).compile();

    controller = module.get<HealthController>(HealthController);
  });

  it("debe estar definido", () => {
    expect(controller).toBeDefined();
  });

  it("retorna status 'ok' cuando la DB responde", async () => {
    const result = await controller.health();
    expect(result.status).toBe("ok");
    expect(result.checks.database).toBe("ok");
  });

  it("retorna status 'degraded' cuando la DB falla", async () => {
    prismaService.client.$queryRaw.mockRejectedValueOnce(new Error("DB down"));
    const result = await controller.health();
    expect(result.status).toBe("degraded");
    expect(result.checks.database).toBe("error");
  });

  it("el response incluye service, version y timestamp", async () => {
    const result = await controller.health();
    expect(result.service).toBe("moraworld-api");
    expect(result.version).toBe("0.1.0");
    expect(result.timestamp).toMatch(/^\d{4}-\d{2}-\d{2}T/);
  });

  it("timestamp es una fecha ISO válida", async () => {
    const result = await controller.health();
    const date = new Date(result.timestamp);
    expect(date.getTime()).not.toBeNaN();
  });
});