Escribe pruebas con Testcontainers

const { Client } = require("pg");
const { PostgreSqlContainer } = require("@testcontainers/postgresql");
const {
  createCustomerTable,
  createCustomer,
  getCustomers,
} = require("./customer-repository");

describe("Customer Repository", () => {
  jest.setTimeout(60000);

  let postgresContainer;
  let postgresClient;

  beforeAll(async () => {
    postgresContainer = await new PostgreSqlContainer().start();
    postgresClient = new Client({
      connectionString: postgresContainer.getConnectionUri(),
    });
    await postgresClient.connect();
    await createCustomerTable(postgresClient);
  });

  afterAll(async () => {
    await postgresClient.end();
    await postgresContainer.stop();
  });

  it("should create and return multiple customers", async () => {
    const customer1 = { id: 1, name: "John Doe" };
    const customer2 = { id: 2, name: "Jane Doe" };

    await createCustomer(postgresClient, customer1);
    await createCustomer(postgresClient, customer2);

    const customers = await getCustomers(postgresClient);
    expect(customers).toEqual([customer1, customer2]);
  });
});