java - 无法在SpringRunner中创建环境bean

Question

我需要在使用环境bean的测试类之一中读取单元测试的属性，但是spring无法创建环境bean。

@RunWith(SpringRunner.class)
@TestPropertySource(locations = "/application-test.properties")
public class CardTest {

  @Autowired
  Environment environment;

  @Test
  public void givenPropertyFetchesAndValidatesTheValue() {
    String output = environment.getProperty("test");
    assertThat(output).isEqualTo("502123");
  }
}

错误：


由以下原因引起：org.springframework.beans.BeanInstantiationException：无法实例化[org.springframework.core.env.Environment]：指定的类是接口。


请帮忙

Answer 1

没有模拟环境：将Env bean注入您的TestClass /套件

@RunWith(SpringRunner.class)
@PropertySource("classpath:/application-test.properties")
public class CardTest {

  @Autowired
  Environment environment;

  @Test
  public void givenPropertyFetchesAndValidatesTheValue() {
    String output = environment.getProperty("test");        
  }
}

使用模拟：如果您使用的是Mockito或PowerMockito。您始终可以选择在服务/测试中对其进行模拟

public class MyServicetest {

    // Define the Environment as a Mockito mock object
    @Mock Environment env;

    MyService myService;

    @Before
    public void init() {
        // Boilerplate for initialising mocks 
        initMocks();

        // Define how your mock object should behave
        when(this.env.getProperty("MyProp")).thenReturn("MyValue");

        // Initialise your service
        myService = new MyServiceImpl();

        // Ensure that your service uses your mock environment
        myService.setEnvironment(this.env);
    }

    @Test
    public void shouldDoSomething() {
        // your test
    }

}