Junit:为删除实体的方法编写测试?

时间:2016-06-28 16:30:35

标签: java hibernate jpa junit spring-data

我可以为以下代码编写的详尽的测试是什么?

public void deleteFromPerson(person person) {
    person = personRepository.returnPerson(person.getId());
    personRepository.delete(person);
}

此方法在a service级内。该方法调用JpaRepository,然后在实体上调用它的delete()方法。

如果无法测试实体是否被删除,那么我可以在该方法上运行其他 tests cases吗?

1 个答案:

答案 0 :(得分:5)

有两种测试策略。一个是单元测试,即确保您的服务正常运行。另一个是集成/端到端测试,即确保一切都很好地协同工作。

您对自己拥有的东西进行单元测试,您可以对所有内容进行集成测试。这是一个非常粗略的例子,只使用你的陈述,加上一些我无法填补空白的东西。

单元测试

使用Mockito

PersonRepository personRepository = mock(PersonRepository.class);

@TestSubject
PersonService personService = new PersonService(): 

@Test
public void unitTest() {
    personService.setPersonRepository(personRepository);
    Person person = new Person(1L);
    Person person2 = new Person(1L);

    when(personRepository.returnPerson(1L)).thenReturn(person2); //expect a fetch, return a "fetched" person;

    personService.deleteFromPerson(person);

    verify(personRepository, times(1)).delete(person2); //pretty sure it is verify after call
}

使用EasyMock ......

@Mock
PersonRepository personRepository; //assuming it is autowired

@TestSubject
PersonService personService = new PersonService(): 

@Test
public void unitTest() {
    Person person = new Person(1L);
    Person person2 = new Person(1L);

    EasyMock.expect(personRepository.returnPerson(1L)).andReturn(person2); //expect a fetch, return a "fetched" person;
    personRepository.delete(person2);
    EasyMock.expectLastCall(); //expect a delete for person2 we plan to delete
    replayAll();

    personService.deleteFromPerson(person);

    verifyAll(); //make sure everything was called
}

是的,这个测试看起来很严格,但无论如何,这真的是你在单元测试中测试的全部内容。您希望数据库使用参数从数据库中获取Person,因此为什么有两个Person对象,并且您希望删除传递Person对象的原因,这就是您期望调用的原因。简单方法产生简单的测试。您基本上希望确保按预期与存储库进行交互。在实际实现中,存储库可能会被破坏或为空,但这并不会改变您的服务正确实现的事实。

整合测试

另一方面,如果要进行集成测试,则不使用模拟。相反,您需要连接所有内容,例如测试数据库和repo。我会把它留给你,因为没有实施的参考。

@Test
public void integrationTestForAddAndDelete() {
    Person person = createDummyPersonForInsertion(); //static method that creates a test Person for you
    Person comparePerson;
    //make sure we haven't added the person yet
    Assert.assertNull(personService.getPerson(person));

    //add the Person
    comparePerson = personService.addPerson(person);
    Assert.assertNotNull(personService.getPerson(person));
    //add a rigorous compare method to make sure contents are the same, i.e. nothing is lost or transmuted incorrectly, ignoring ID if that is autogen
    //alternatively, you can create a unit test just for Person
    Assert.assertEquals(person, comparePerson); 

    //remove the Person
    personService.deleteFromPerson(person);
    Assert.assertNull(personService.getPerson(person));

    //test for exception handling when you try to remove a non-existent person;
    personService.deleteFromPerson(person);

    //test for exception handling when you try to remove null
    personService.deleteFromPerson(null);
}

在这种情况下,您需要确保您的repo实际处理来自服务的所有调用。您知道您的服务是通过单元测试工作的,但是repo是从服务中运行还是您配置了错误的