添加 'TestCar'

TestCar

@@ -0,0 +1,51 @@
+package com.rental;
+
+public class TestCar {
+    public static void main(String[] args) {
+        System.out.println("===== 车辆管理系统测试 =====\n");
+
+        Car car1 = new Car("京A12345", "大众", "朗逸", 200.0);
+        Car car2 = new Car("沪B67890", "丰田", "凯美瑞", 350.0);
+        Car car3 = new Car("粤C24680", "本田", "雅阁");
+
+        System.out.println("=== 创建的车辆信息 ===");
+        car1.displayInfo();
+        car2.displayInfo();
+        car3.displayInfo();
+
+        System.out.println("\n=== 测试租车功能 ===");
+        System.out.println("对车辆1进行租车操作：");
+        car1.rentCar();
+        System.out.println("再次尝试租车：");
+        car1.rentCar();
+
+        System.out.println("\n=== 测试还车功能 ===");
+        System.out.println("对车辆1进行还车操作：");
+        car1.returnCar();
+        System.out.println("再次尝试还车：");
+        car1.returnCar();
+
+        System.out.println("\n=== 测试租金计算 ===");
+        System.out.println("车辆2租用5天的费用：" + car2.calculateRent(5) + " 元");
+        System.out.println("车辆3租用3天的费用：" + car3.calculateRent(3) + " 元");
+
+        System.out.println("\n=== 测试setter数据校验 ===");
+        System.out.println("尝试将车辆1的日租金设置为-100：");
+        car1.setDailyRent(-100);
+        System.out.println("车辆1当前日租金：" + car1.getDailyRent());
+        System.out.println("将车辆1的日租金设置为250：");
+        car1.setDailyRent(250);
+        System.out.println("车辆1当前日租金：" + car1.getDailyRent());
+
+        System.out.println("\n=== 测试品牌和型号修改 ===");
+        car1.setBrand("奥迪");
+        car1.setModel("A4");
+        System.out.println("修改后的车辆1信息：");
+        car1.displayInfo();
+
+        System.out.println("\n=== 车辆总数统计 ===");
+        System.out.println("总车辆数：" + Car.getTotalCars() + " 辆");
+
+        System.out.println("\n=== 测试完成 ===");
+    }
+}