app.test.js

const request = require("supertest"); 

jest.mock("node-fetch", () => jest.fn());

const fetch = require("node-fetch");
const app = require("../app.js");

describe("POST /weather", () => {
  it("should return weather text for a valid city", async () => {
    fetch.mockResolvedValue({
      json: async () => ({
        main: { temp: 280 },
        cod: 200,
      }),
    });

    const response = await request(app)
      .post("/weather")
      .send({ cityName: "London" });

    expect(response.statusCode).toBe(200);
    expect(response.body.weatherText).toContain("The weather in London");
  });

  it("should return an error if city name is missing", async () => {
    const response = await request(app).post("/weather").send({});

    expect(response.statusCode).toBe(400);
    expect(response.body.weatherText).toBe("City name is required!");
  });

  it("should return city not found for invalid city", async () => {
    // نرجّع كود 404 من الـ API
    fetch.mockResolvedValue({
      json: async () => ({
        cod: "404",
      }),
    });

    const response = await request(app)
      .post("/weather")
      .send({ cityName: "asdkjashdkjashd" });

    expect(response.body.weatherText).toBe("City is not found!");
  });
});