假设我有一个看起来像这样的经理:
public class CustomerManager {
@Autowired
@Qualifier("customerDAO")
private CustomerDAO customerDAO;
public List<Customer> findCustomers() {
List<Customer> customers = customerDAO.findCustomers();
if (customers.size() == 0) {
// Do something else...
}
if (customers.size() == 1) {
// Do something else...
}
return customers;
}
}
现在是我的测试配置示例:
public class CustomerManagerUnitTest extends AbstractDependencyInjectionSpringContextTests {
protected String[] getConfigLocations() {
return new String[] { "classpath:test-spring-customer.xml" };
}
public void testFindCustomers_NoResults() {
CustomerManager customerManager = new CustomerManager();
List<Customer> customers = customerManager.findCustomers();
// Test...
}
public void testFindCustomers_OneResult() {
CustomerManager customerManager = new CustomerManager();
List<Customer> customers = customerManager.findCustomers();
// Test...
}
public void testFindCustomers_MultipleResults() {
CustomerManager customerManager = new CustomerManager();
List<Customer> customers = customerManager.findCustomers();
// Test...
}
}
根据客户数量(或客户数据类型),我需要做一些具体的事情。我正在使用 Spring 的 AbstractDependencyInjectionSpringContextTests 来使用测试上下文。因此,从测试上下文配置中获取模拟 DAO,并 Autowiring 它是没有问题的。但是,这意味着对于需要测试不同结果集的每个测试,我都需要有不同的上下文配置和不同的模拟 DAO。现在您可以看到我的模拟 DAO 只有一个测试配置。处理此问题的最佳方法是什么?
最佳答案
不要让 Spring 创建您的 CustomerManager 进行测试。手动创建它并手动注入(inject)模拟 DAO。这就是依赖注入(inject)的全部要点:
public class CustomerManager {
private CustomerDAO customerDAO;
@Autowired
public CustomerManager(@Qualifier("customerDAO") CustomerDAO customerDAO) {
this.customerDAO = customerDAO;
}
}
public class CustomerManagerUnitTest {
public void testFindCustomers_OneResult() {
CustomerDAO mockCustomerDAO = ...;
CustomerManager customerManager = new CustomerManager(mockCustomerDAO);
expect(customerDAO.findCustomers()).andReturn(...);
// ...
List<Customer> customers = customerManager.findCustomers();
// Test...
}
}
关于java - 当我们使用 Spring Autowiring DAO 时,如何在我的单元测试中模拟出各种结果集?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6612689/