Question

Junit对Spring Boot应用程序进行测试。

有人对我如何使用JUnit和Mockito实现这一目标有任何建议吗？

@Autowired
JdbcTemplate jdbcTemplate;

public List<Student> getStudentDetails(String department) {

   List<Student> results = new LinkedList<String>();
   results =  jdbcTemplate.query("SELECT * FROM STUDENT WHERE DEPARTMENT = ?", new PreparedStatementSetter() {
        @Override
        public void setValues(PreparedStatement preparedStatement) throws SQLException {
            preparedStatement.setString(1, department);
            preparedStatement.setFetchSize(10);
        }
    }, new ResultSetExtractor<List<Student>>() {
        @Override
        public List<Student> extractData(ResultSet rs) throws SQLException {
            List<Student> students = new ArrayList<>();
            while (rs.next()) {
                Student student = new Student<>();
                student.setDepartment(rs.getString("NAME"));
                student.setName(rs.getString("DEPARTMENT"));
                students.add(student);
            }
            return students;
        }
    });
   return results      
  }

Answer 1

您拥有的代码与数据库有关，我认为应该使用某些数据库进行测试。通常的做法是使用嵌入式数据库（例如h2）。人们会这样做，因为使用单元测试无法检查查询是否真的有效，因为您实际上并未运行它。因此，我将结合集成和单元测试来测试此类。

单元测试将是这样的：

data <- data.frame(a = c("2018-06-01 09:00:17",
                         "2018-06-01 20:31:54",
                         "2018-06-01 20:32:49", 
                         "2018-06-01 20:34:45",
                         "2018-06-02 12:28:27",
                         "2018-06-04 22:01:58",
                         "2018-06-05 01:31:34",
                         "2018-06-05 01:31:46",
                         "2018-06-05 01:33:03",
                         "2018-06-05 01:33:03",
                         "2018-06-05 01:33:12"),
                   b = c(0, 0, 91, 0, 522, 0, 0, 501, 0, 501, 501),
                   c = c(511, 250, 250, 250, 501, 511, 501, 501, 501, 501, 501),
                   d = c(0, 522, 0, 559, 200, 0, 501, 0, 501, 501,0),
                   DateShift = c(NA,
                     "2018-06-01 09:00:17",
                         "2018-06-01 20:31:54",
                         "2018-06-01 20:32:49", 
                         "2018-06-01 20:34:45",
                         "2018-06-02 12:28:27",
                         "2018-06-04 22:01:58",
                         "2018-06-05 01:31:34",
                         "2018-06-05 01:31:46",
                         "2018-06-05 01:33:03",
                         "2018-06-05 01:33:03"),
                   Wait = c(1, 1, 1, 1, 1, 1, 0, 12, 0, 0, 9),
                   stringsAsFactors = FALSE) 
data

这里，我只是使用我们发送到@ExtendWith(MockitoExtension.class) class StubTest { @Mock JdbcTemplate jdbcTemplate; @InjectMocks Stub stub; @Test void whenExecuteQuery_thenExtractDataCorrectly() throws SQLException { //GIVEN ArgumentCaptor<PreparedStatementSetter> setterCaptor = ArgumentCaptor.forClass(PreparedStatementSetter.class); ArgumentCaptor<ResultSetExtractor> extractorCaptor = ArgumentCaptor.forClass(ResultSetExtractor.class); //WHEN stub.getStudentDetails("TEST"); //THEN verify(jdbcTemplate).query(anyString(), setterCaptor.capture(), extractorCaptor.capture()); //AND PreparedStatementSetter setter = setterCaptor.getValue(); PreparedStatement preparedStatement = Mockito.mock(PreparedStatement.class); setter.setValues(preparedStatement); verify(preparedStatement).setString(1, "TEST"); verify(preparedStatement).setFetchSize(10); verifyNoMoreInteractions(preparedStatement); //AND ResultSetExtractor extractor = extractorCaptor.getValue(); ResultSet rs = Mockito.mock(ResultSet.class); when(rs.next()).thenReturn(true).thenReturn(false); when(rs.getString(anyString())).thenReturn("TEST","name"); verifyNoMoreInteractions(rs); List<Student> students = (List<Student>) extractor.extractData(rs); assertThat(students.get(0).getName()).isEqualTo("name"); assertThat(students.get(0).getDepartment()).isEqualTo("TEST"); } }方法的业务逻辑来捕获参数。然后，我运行参数的重写方法并验证它们是否按预期工作。

如何为此代码编写Junit测试，覆盖率达到100％？

1 个答案: