Spring Bootでテスト用のapplication.propertiesを読み込む

テスト用にapplication.propertiesを用意して、テスト時にはそちらを読み込む。

src/resources/application.properties

app.name=props-app
app.comment=this is app:${app.name}

test/resource/application.properties

app.name=props-test
app.comment=this is test:${app.name}

@Valueでインジェクションする

PropsService.java

@Service
public class PropsService {
   @Value("${app.name}")
   private String appName;

   @Value("${app.comment}")
   private String appComment;
 
   public String getAppName() {
     return appName;
   }

   public String getComment() {
     return appComment;
   }
}

@ConfigurationPropertiesで読み込む

• PropsConfig.java

@Component
@ConfigurationProperties(prefix = "app")
public class PropsConfig {
    private String name;
    private String comment;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getComment() {
        return comment;
    }

    public void setComment(String comment) {
        this.comment = comment;
    }
}

• PropsService.java

@Service
public class PropsService {
    @Autowired
    PropsConfig propsConfig;

    public String getAppName() {
        return propsConfig.getName();
    }

    public String getComment() {
        return propsConfig.getComment();
    }
}

テストコード

• PropsServiceTest.java

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
public class PropsServiceTest {
    @Autowired
    PropsService service;

    @Test
    public void test_getAppName() {
        assertThat(service.getAppName()).isEqualTo("props-test");
    }

    @Test
    public void test_getComment() {
        assertThat(service.getComment()).isEqualTo("this is test:props-test");
    }
}

@SpringBootTestを入れ忘れて読み込まれなくて苦しんだ。