Question

我想对我的JDBI映射器类进行单元测试，因为并非所有人都可以进行简单的属性映射。

我的测试类看起来如下：

  public class IdentRuleMapperTest {

  @Mock
  ResultSet resultSet;

  @Mock
  ResultSetMetaData resultSetMetaData;

  @Mock
  StatementContext ctx;

  IdentRuleMapper mapper;

  @Before
  public void setup() {
    mapper = new IdentRuleMapper();
  }

  @Test
  public void mapTest() throws SQLException {
    Mockito.when(resultSet.getString("ID")).thenReturn("The ID");
    Mockito.when(resultSet.getString("NAME")).thenReturn("The name");
    Mockito.when(resultSet.getString("REGULATION")).thenReturn("CRS");
    Mockito.when(resultSet.getString("JSON_ACTIONS_STRING")).thenReturn("the json string");
    IdentRule identRule = mapper.map(0, resultSet, ctx);

  }
}

测试将NPE抛到行

Mockito.when(resultSet.getString("ID")).thenReturn("The ID");

任何人都可以向我指出为什么这不起作用？

Answer 1

The annotation @Mock does not create the mock objects by itself. You have to add Mockito's JUnit rule as a field to your test

@Rule
public MockitoRule rule = MockitoJUnit.rule();

or use its JUnit runner

@RunWith(MockitoJUnitRunner.class)
public class IdentRuleMapperTest {
  ...

or create the mocks in an @Before method using MockitoAnnotations

@Before
public void initMocks() {
  MockitoAnnotations.initMocks(this);
}

Answer 2

在设置模拟对象的期望时，使用Matchers进行参数匹配。

Mockito.when(resultSet.getString( Matchers.eq("ID"))).thenReturn("The ID");

JDBI映射器JUnit测试

2 个答案: