Java 如何使用WebEnvironment.RANDOM_PORT获得第二个随机端口

经过一些研究，我发现我可以为这个特定的测试用例使用类和方法org.springframework.test.util.TestSocketUtils.findAvailableTcpPort()，其中was introduced after和SocketUtils已经被移除.

在此基础上，我实现了类似的RandomPortInitializer:

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public abstract class AbstractIntegrationTest {

  // This value will be set later by the RandomPortInitializer
  @Value("${server.internalPort}")
  int internalPort;

  ...

  public static class RandomPortInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

      @Override
      public void initialize(ConfigurableApplicationContext applicationContext) {
        int randomPort = TestSocketUtils.findAvailableTcpPort();
        TestPropertySourceUtils.addInlinedPropertiesToEnvironment(applicationContext,
              "server.internalPort=" + randomPort);
      }
    }
  ...
}

我在我的具体测试类上使用该初始化式，在那里我可以访问internalPort值.

@DisplayName("Do some tests")
@ContextConfiguration(initializers = {RandomPortInitializer.class})
class MyIntegrationTest extends AbstractIntegrationTest {
...