Spring Boot @ConfigurationProperties 验证测试失败

Question

我想编写一个测试来@NotNull验证.@NotEmpty@ConfigurationProperties

@Configuration
@ConfigurationProperties(prefix = "myPrefix", ignoreUnknownFields = true)
@Getter
@Setter
@Validated
public class MyServerConfiguration {
  @NotNull
  @NotEmpty
  private String baseUrl;
}

我的测试如下所示：

@RunWith(SpringRunner.class)
@SpringBootTest()
public class NoActiveProfileTest {
  @Test(expected = org.springframework.boot.context.properties.bind.validation.BindValidationException.class)
  public void should_ThrowException_IfMandatoryPropertyIsMissing() throws Exception {
  }

}

当我运行测试时，它报告在测试运行之前启动应用程序失败：

***************************
APPLICATION FAILED TO START
***************************
Description:
Binding to target   org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'myPrefix' to com.xxxxx.configuration.MyServerConfiguration$$EnhancerBySpringCGLIB$$4b91954c failed:

我如何期望异常会编写负面测试？即使我将其替换BindException.class为Throwable.class应用程序也无法启动。

Answer 1

尝试以编程方式加载 Spring Boot 应用程序上下文：

简易版

public class AppFailIT {

    @Test
    public void testFail() {
        try {
            new AnnotationConfigServletWebServerApplicationContext(MyApplication.class);
        }
        catch (Exception e){
            Assertions.assertThat(e).isInstanceOf(UnsatisfiedDependencyException.class);
            Assertions.assertThat(e.getMessage()).contains("nested exception is org.springframework.boot.context.properties.bind.BindException: Failed to bind properties");
            return;
        }
        fail();
    }
}

扩展版本 能够从 application-test.properties 加载环境并添加自己的键：值到方法级别的测试环境：

@TestPropertySource("classpath:application-test.properties")
public class AppFailIT {

    @Rule
    public final SpringMethodRule springMethodRule = new SpringMethodRule();

    @Autowired
    private ConfigurableEnvironment configurableEnvironment;

    @Test
    public void testFail() {
        try {
            MockEnvironment mockEnvironment = new MockEnvironment();
            mockEnvironment.withProperty("a","b");
            configurableEnvironment.merge(mockEnvironment);
            AnnotationConfigServletWebServerApplicationContext applicationContext = new AnnotationConfigServletWebServerApplicationContext();
            applicationContext.setEnvironment(configurableEnvironment);
            applicationContext.register(MyApplication.class);
            applicationContext.refresh();
        }
        catch (Exception e){
            Assertions.assertThat(e.getMessage()).contains("nested exception is org.springframework.boot.context.properties.bind.BindException: Failed to bind properties");
            return;
        }
        fail();
    }
}