java - Jacoco 需要对 Lambdas Java8 进行特殊处理吗？

Question

我读过几篇关于 Jacoco 支持 Lambda 函数的旧帖子，问题在几年前得到解决。
我发现当我运行 Jacoco 时，它没有报告此代码中 Lambda 函数的覆盖率

        List<SubmissionStatus> result = jdbcTemplate.query(
            FINDALL_SQL,
            (rs, rowNum) -> new SubmissionStatus(
                    rs.getLong("subm_rec_id"),
                    rs.getLong("subm_file_id"),
                    rs.getString("contract_id"),
                    rs.getString("contract_name"),
                    rs.getString("status"))
    );

我知道它被击中是因为测试无法通过。
我是否需要为 Jacoco 做一些特别的事情才能正确报告覆盖范围？

Answer 1

您可以尝试这样的方法来获得 100% 的覆盖率。

在源代码上，你可以这样修改

List<SubmissionStatus> result = jdbcTemplate.query(
            FINDALL_SQL, getSubmissionStatusRowMapper()
);

protected RowMapper<SubmissionStatus> getSubmissionStatusRowMapper() {
    return (ResultSet row, int rowNum) -> new SubmissionStatus(
                    row.getLong("subm_rec_id"),
                    row.getLong("subm_file_id"),
                    row.getString("contract_id"),
                    row.getString("contract_name"),
                    row.getString("status")
    );
  }

您可以使用 Mockito 创建 Junit Test 类以使其工作

@RunWith(MockitoJUnitRunner.class)
public class SubmissionStatusDAOTest {
    private static final long SUBM_REC_ID= 1;
    private static final long SUBM_FILE_ID= 2;
    private static final String CONTRACT_ID= "123";
    private static final String CONTRACT_NAME= "ABC";
    private static final String STATUS = "SUCCESS";

    @InjectMocks
    private SubmissionStatusDAO dao;

    @Mock   
    private JdbcTemplate jdbcTemplate;

    @Mock   
    private ResultSet resultSet;


    @Before
    public void prepareTest() throws SQLException {
        when(resultSet.getLong("subm_rec_id")).thenReturn(SUBM_REC_ID);
        when(resultSet.getLong("subm_file_id")).thenReturn(SUBM_FILE_ID);
        when(resultSet.getString("contract_id")).thenReturn(CONTRACT_ID);
        when(resultSet.getString("contract_name")).thenReturn(CONTRACT_NAME);
        when(resultSet.getString("status")).thenReturn(STATUS);
    }

    @Test
    public void test() throws SQLException {
        RowMapper<SubmissionStatus> rowMapper = dao.getSubmissionStatusRowMapper();

        SubmissionStatus submissionStatus = rowMapper.mapRow(resultSet, 1);
        assertEquals(SUBM_REC_ID, submissionStatus.getSubmRecId());

    }

}