Question

看起来我好像遇到了我自己无法解决的麻烦。这里的故事：我有一个任务，我应该学习mockito框架和测试耦合方法。不允许在内存数据库中使用。

在OrderDaoImpl类中return new Order(resultSet.getString(name)); 我得到DomainArgumentValidationException: Can not be null。

查看Order的构造函数：

public class Order {

private String name;
private Set<Good> goods = new HashSet<>();

public Order(String name) {
    Util.assertValidName(name);
    this.name = name;
}

setters, getters...

如果我理解正确new Order()对象必须有正确的名称，否则他无法创建。名称不能为空。这就是我头疼的原因。

如何让resultSet在new Order(resultSet.getString(name)传递String？

如果我的结论错了，请帮助我了解这里发生了什么，以及如何做到正确。

这是我的测试方法：

class OrderDaoImpl {

    private DaoFactory daoFactory = new DaoFactory();

    Order retrieveByName(String name) throws Exception {
        String sql = "select * from orders where name = ?;";

        try (Connection connection = daoFactory.getConnection();
                PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
            preparedStatement.setString(1, name);
            preparedStatement.execute();
            ResultSet resultSet = preparedStatement.getResultSet();
            resultSet.next();
            return new Order(resultSet.getString(name));
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
    } 
}

这是我的junit测试：

@RunWith(MockitoJUnitRunner.class)
public class OrderDaoImplTest {

    @InjectMocks
    OrderDaoImpl orderDao = new OrderDaoImpl();

    @Mock
    DaoFactory mockDaoFactory;

    @Mock
    Connection mockConnection;

    @Mock
    PreparedStatement mockPreparedStatement;

    @Mock
    ResultSet mockResultSet;

    @Test
    public void testRetrieveByName() throws Exception {
        // Set Up
        String sql = "select * from orders where name = ?;";
        String orderName = "Test";

        Answer<String> answer = new Answer<String>() {
            public String answer(InvocationOnMock invocation) throws Throwable {
                String string = invocation.getArgumentAt(0, String.class);
                return string;
            }
        };

        // Mock expectations
        when(mockDaoFactory.getConnection()).thenReturn(mockConnection);
        when(mockConnection.prepareStatement(sql)).thenReturn(mockPreparedStatement);
        doNothing().when(mockPreparedStatement).setString(1, cathedraName);
        when(mockPreparedStatement.execute()).thenReturn(true);
        when(mockPreparedStatement.getResultSet()).thenReturn(mockResultSet);
        when(mockResultSet.next()).thenReturn(true).thenReturn(false);
        when(mockResultSet.getString(orderName)).thenAnswer(answer);

        // Execute the method being tested
        orderDao.retrieveByName(orderName);

        // Validation
        assertThat(orderDao.retrieveByName(orderName), is(new Order(orderName)));

        verify(mockDaoFactory, times(1)).getConnection();
        verify(mockConnection, times(1)).prepareStatement(sql);
        verify(mockPreparedStatement, times(1)).setString(1, orderName);
        verify(mockPreparedStatement, times(1)).execute();
        verify(mockPreparedStatement, times(1)).getResultSet();
        verify(mockResultSet, times(1)).next();
        verify(mockResultSet, times(1)).getString(orderName);
    }

}

获取＆＃34; DomainArgumentValidationException：不能为null＆＃34;而junit测试

0 个答案: