测试驱动开发

1、测试驱动开发Test-driven development想到了什么.软件质量外部质量内部质量设计开发有效率TDD是什么涉及UI的测试功能测试单元测试TDD是什么与极限编程提出的测试先行有关联是一种软件研发过程，开发风格可以做到简单设计、增强信心TDD-软件开发过程增加一个测试运行所有的测试，观察新建的测试是失败的针对新建测试写实现代码运行所有的测试成功重构代码TDD涉及的概念test doubledummyfakestubmock一个测试依据一份订单，出货威士忌产品 订单包含一种产品和这个产品的出货数量，仓库有不同的产品库存。如仓库中有足够的产品则出货，该产品在仓库中的总量减少出货数；如仓库

2、中没有足够的产品，该产品不出货。订单 order；仓库 warehouse；产品 product；产品清单 inventorypublic class OrderStateTest private static String TALISKER = “Talisker”;private static String HIGHLAND_PARK = Highland Park;private Warehouse warehouse = new WarehouseImpl();protected void setUp() warehouse.add(TALISKER, 50);warehouse.ad

3、d(HIGHLAND_PARK, 25);public void testOrderIsFilledIfEnoughInWarehouse() Order order = new Order(TALISKER, 50);order.fill(warehouse);assertTrue(order.isFilled();assertTrue(0, warehouse.getInventory(TALISKER);public void testOrderDoesNotRemoveIfNotEnough() Order order = new Order(TALISKER, 51);order.f

4、ill(warehouse);assertFalse(order.isFilled();assertEquals(50, warehouse.getInventory(TALISKER);装配-SETUPprotected void setUp() warehouse.add(TALISKER, 50);warehouse.add(HIGHLAND_PARK, 25);Order order = new Order(TALISKER, 50);Order order = new Order(TALISKER, 51);执行-EXCUTIONorder.fill(warehouse);验证-VA

5、LIDATIONassertTrue(order.isFilled();assertTrue(0, warehouse.getInventory(TALISKER);assertFalse(order.isFilled();assertEquals(50, warehouse.getInventory(TALISKER);清理-CLEANUP这个示例中，没有显示地恢复测试前状态。由垃圾回收器回收对象，恢复测试前状态public class OrderStateTest private static String TALISKER = “Talisker”;private static Stri

6、ng HIGHLAND_PARK = Highland Park;private Warehouse warehouse = new WarehouseImpl();protected void setUp() warehouse.add(TALISKER, 50);warehouse.add(HIGHLAND_PARK, 25);public void testOrderIsFilledIfEnoughInWarehouse() Order order = new Order(TALISKER, 50);order.fill(warehouse);assertTrue(order.isFil

7、led();assertTrue(0, warehouse.getInventory(TALISKER);public void testOrderDoesNotRemoveIfNotEnough() Order order = new Order(TALISKER, 51);order.fill(warehouse);assertFalse(order.isFilled();assertEquals(50, warehouse.getInventory(TALISKER);参考资料Test-driven development/wiki/Test-driven_development测试驱动开发英文名称：Test-Driven Development by Example作者：Ken