Lab 1: Hotel Reservation System - Implementation Complete

Summary

Completed Lab 1 requirements including unit tests, JPA annotations, and reservation cancellation feature for the hotel booking REST API.

Changes Made

1. Unit Testing

Implemented test methods in RoomTest class using JUnit and AssertJ
Added tests for successful reservation, failed reservation, successful cancellation, and failed cancellation scenarios
All domain logic properly tested

2. Missing Annotations Restored

ReservationController: Added @RestController, @RequestMapping, @PostMapping, @DeleteMapping, @PathVariable
RoomEntity: Added @Entity, @Table, @Id, @Column with proper mappings
ReservationEntity: Added @Entity, @Table, @Id, @Column, @OneToOne, @JoinColumn with correct column names

3. Reservation Cancellation Feature

Added cancelReservation() method to Room domain class with validation
Implemented cancelReservation(Long) in ReservationService
Added DELETE /api/reservations/{id} endpoint in ReservationController
Created unit and integration tests for cancellation functionality
Room availability is properly restored after cancellation

API Endpoints

POST /api/reservations/reserve?roomNumber={number}&guestName={name} - Create reservation
DELETE /api/reservations/{id} - Cancel reservation