java - Spring Boot - Junit 无法在 junit 测试中加载配置属性

Question

我有一个 consumer.properties 文件，在 src/main/resources 中包含以下内容，以及一个随附的 Configuration 类，该类将文件的内容加载并存储到类成员中变量:

//src/main/resources 中的consumer.properties 文件:

com.training.consumer.hostname=myhost
com.training.consumer.username=myusername
com.training.consumer.password=mypassword

//ConsumerConfig.java

@Configuration
@PropertySource(
        value= {"classpath:consumer.properties"}
        )
@ConfigurationProperties(prefix="com.training.consumer")
public class ConsumerConfig {

    private String hostname;
    private String username;
    private String password;

    public ConsumerConfig() { }

    public String getHostname() {
        return hostname;
    }
    public void setHostname(String hostname) {
        this.hostname = hostname;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "ConsumerConfig [hostname=" + hostname + ", username=" + username + ", password=" + password + "]";
    }
}

我还有一个 ConfigsService 类，它 Autowiring ConsumerConfig 类以检索各个属性:

@Component
public class ConfigsService {

    @Autowired
    ConsumerConfig consumerConfig;

    public ConsumerConfig getConsumerConfig() {
        return consumerConfig;
    }

    public void showConfig() {
        consumerConfig.toString();
    }

    public ConsumerConfig getConfig() {
        return consumerConfig;
    }
}

运行 ConfigsService 的方法时，属性加载得很好。问题出在单元测试中，即使在创建了 src/test/resources 目录之后，调用 configService.getConfig().getHostname() 也会返回空值，并在其中添加我的 consumer.properties 文件:

@TestPropertySource("classpath:consumer.properties")
public class ConfigsServiceTest {

    @Mock
    ConsumerConfig consumerConfig;

    @InjectMocks
    ConfigsService configService;


    @Before
    public void beforeEach() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void someTest() {
        System.out.println(configService.getConfig().getHostname()); //outputs null here -- wth!
        Assert.assertTrue(true);
    }
}

Answer 1

由于模拟对象，您得到了空值。我建议使用带有上下文配置的 spring runner，它将加载配置类中的属性并创建 bean。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {ConsumerConfig.class, ConfigsService.class})
@TestPropertySource(locations = "classpath:consumer.properties")
public class ConfigsServiceTest {

  @Autowired
  private ConfigsService configsService;

  @Test
  public void someTest() {
    Assert.assertNotNull(configService.getConfig().getHostname());
  }
}