fix(e2e): remove server.listen and use supertest directly to avoid hanging handles

Author: NightDreams

api/e2e/books.integration.js api/e2e/books.integration.e2e.jsapi/e2e/books.integration.js renamed to api/e2e/books.integration.e2e.js

@@ -1,8 +1,6 @@
 const request = require('supertest');
-
-const { generateManyBook } = require('../src/fakes/book.fake');
-
 const mockGetAll = jest.fn();
+const { generateManyBooks } = require('../src/fakes/book.fake');
 
 jest.mock('../src/lib/mongo.lib', () =>
   jest.fn().mockImplementation(() => ({
@@ -15,20 +13,15 @@ const createApp = require('../src/app');
 
 describe('Test for books', () => {
   let app = null;
-  let server = null;
+
   beforeAll(() => {
     app = createApp();
-    server = app.listen(3001);
-  });
-
-  afterAll(async () => {
-    await server.close();
   });
 
   describe('test for [GET] /api/v1/books', () => {
     test('should return a list books', () => {
       // Arrange
-      const fakeBooks = generateManyBook(3);
+      const fakeBooks = generateManyBooks(3);
       mockGetAll.mockResolvedValue(fakeBooks);
       // Act
       return request(app)