再写测试的时候一定要注意变量问题

我在写测试时，怎么都不通过，结果仔细一查发现，是定义变量的时候，没定义成static的，这样的话如果上面的测试和下面有关则就不会通过

public class AddressServiceTest extends TestCase {

public AddressServiceImpl addressService;
public static Integer id = null; //如果此处没有把id设置成static，只有第一个可以通过测试
public AddressServiceTest(String name){
super(name);
}
@Override
protected void setUp() throws Exception {
// TODO Auto-generated method stub
super.setUp();
addressService = new AddressServiceImpl();
AddressDAO addressDAO = new AddressDAOImpl();
addressService.setAddressDAO(addressDAO);
}

@Override
protected void tearDown() throws Exception {
// TODO Auto-generated method stub
super.tearDown();
}

//测试分页
public void testList()throws Exception{
Pager pager = addressService.list("admin", 25, 1);
assertTrue(pager.getRowCount()>0);
Iterator<?> it = pager.getResultList().iterator();
while(it.hasNext()){
Address address = (Address)it.next();
assertNotNull(address);
}
}
//测试新增
public void testInsert()throws Exception{
Address address = new Address();
address.setUsername("admin");
address.setName("andy");
address.setSex("男");
address.setMobile("13894007562");
address.setEmail("[e-mail]");
address.setQq("602927062");
address.setCompany("Intel");
address.setAddress("北京");
address.setPostcode("136000");
id = addressService.insert(address);
assertNotNull(id);
}
//测试查询
public void testSelect()throws Exception{
assertNotNull(addressService.select(id));
}
//测试更新
public void testUpdate()throws Exception{
Address address = new Address();
address.setId(id);
address.setUsername("admin");
address.setName("andy");
address.setSex("男");
address.setMobile("13894007562");
address.setEmail("[e-mail]");
address.setQq("602927062");
address.setCompany("Microsoft");
address.setAddress("北京");
address.setPostcode("136000");
addressService.update(address);

Address address2 = addressService.select(id);
assertTrue(address2.getCompany().equals("Microsoft"));
}
//测试删除
public void testDelete()throws Exception{
addressService.delete(id);
assertNull(addressService.select(id));
}

}