实例说明
假设有一个Student表,现在要对StudentService类进行测试。持久层框架此处使用Mybatis,相关的类以及配置文件如下:
Student实体类:
public class Student { private Integer id; public Student(String name, String sex, Byte age, String tel) { this.name = name; this.sex = sex; this.age = age; this.tel = tel; } public Student() { } private String name; private String sex; private Byte age; private String tel; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name == null ? null : name.trim(); } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex == null ? null : sex.trim(); } public Byte getAge() { return age; } public void setAge(Byte age) { this.age = age; } public String getTel() { return tel; } public void setTel(String tel) { this.tel = tel == null ? null : tel.trim(); } }
StudentMapper接口:
public interface StudentMapper { int insert(Student record); Student selectByPrimaryKey(Integer id); int updateByPrimaryKey(Student record); }
StudentService服务接口:
public interface StudentService { public Student getStudentsById(int StudentsId); public int insertStudent(Student s); public void updateStudent(Student s); }
StudentServiceImpl接口实现:
public class StudentServiceImpl implements StudentService { @Autowired private StudentMapper studentMapper; public Student getStudentsById(int StudentsId) { return studentMapper.selectByPrimaryKey(StudentsId); } public int insertStudent(Student s) { return studentMapper.insert(s); } public void updateStudent(Student s) { studentMapper.updateByPrimaryKey(s); } }
单元测试:
@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = {"classpath:spring.xml"}) @Transactional @Rollback(true) public class StudentServiceTest { @Autowired private StudentService studentService; @Test public void testInsertStudent() { Student s = new Student("test", "male", (byte) 23, "110"); studentService.insertStudent(s); Assert.assertEquals(studentService.getStudentsById(s.getId()).getName(),"test"); Assert.assertEquals(studentService.getStudentsById(s.getId()).getAge().intValue(), 23); } @Test public void testUpdateStudent() { Student s = new Student("test", "male", (byte) 23, "110"); studentService.insertStudent(s); Assert.assertEquals(studentService.getStudentsById(s.getId()).getName(),"test"); Assert.assertEquals(studentService.getStudentsById(s.getId()).getAge().intValue(), 23); s.setAge((byte)25); s.setName("test2"); studentService.updateStudent(s); Assert.assertEquals(studentService.getStudentsById(s.getId()).getName(),"test2"); Assert.assertEquals(studentService.getStudentsById(s.getId()).getAge().intValue(), 25); } }
@Transactional注释标签在此测试类中启用了事务支持,这样所有的测试执行完后都会自动回滚,不会在数据库中产生脏数据,不用自己清除所做的任何对数据库的变更了。
@Rollback(true)设置事务回滚,其实默认@Transactional注释defaultRollback是默认为true的,此处不加也可以。
执行结果如下图所示 :