java 无法在 Spring Boot Test 1.5 中设置运行时本地服务器端口
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Unable to set runtime Local Server Port in Spring Boot Test 1.5
提问by Meena Chaudhary
I am using Spring Boot 1.5 for my application. In integration testing I want to fetch the runtime port number of the web server(note: TestRestTemplate is not useful in my case.). There are a few approaches I have tried but none of them seem to work. Below are my approaches.
我正在为我的应用程序使用 Spring Boot 1.5。在集成测试中，我想获取 Web 服务器的运行时端口号（注意：TestRestTemplate 在我的情况下没有用。）。我尝试了几种方法，但它们似乎都不起作用。下面是我的方法。
First Approach
第一种方法
@SpringBootTest(classes = TestConfig.class, webEnvironment =WebEnvironment.DEFINED_PORT)
public class RestServiceTest {
@LocalServerPort
protected int port;
In my src/main/resources/config/application.propertiesfile I have defined server port as
在我的src/main/resources/config/application.properties文件中，我将服务器端口定义为
server.port = 8081
服务器端口 = 8081
But With this code I am getting error
但是使用此代码我收到错误
Could not resolve placeholder 'local.server.port' in value "${local.server.port}"
无法解析值“${local.server.port}”中的占位符“local.server.port”
Second Approach
第二种方法
I have changed
我改变了
webEnvironment =WebEnvironment.DEFINED_PORT
webEnvironment =WebEnvironment.DEFINED_PORT
to
到
webEnvironment =WebEnvironment.RANDOM_PORT
webEnvironment =WebEnvironment.RANDOM_PORT
and in my src/main/resources/config/application.propertiesfile I have defined
在我的src/main/resources/config/application.properties文件中我已经定义了
server.port = 0
服务器端口 = 0
This throws the same as error as the first approach.
这与第一种方法抛出的错误相同。
Third Approach
第三种方法
In third approach I have tried to use
在我尝试使用的第三种方法中
protected int port;
@Autowired
Environment environment
this.port = this.environment.getProperty("local.server.port");
this returns nullvalue
这返回null值
Fourth Approach
第四种方法
Lastly I have tried to use ApplicationEventsto find out the port number by creating an event listener to listen to EmbeddedServletContainerIntialize
最后，我尝试ApplicationEvents通过创建一个事件侦听器来侦听端口号EmbeddedServletContainerIntialize
@EventListener(EmbeddedServletContainerInitializedEvent.class)
public void onApplicationEvent(EmbeddedServletContainerInitializedEvent event) {
this.port = event.getEmbeddedServletContainer().getPort();
}
public int getPort() {
return this.port;
}
Added the same to TestConfig
添加了相同的 TestConfig
Now, In my test class I have tried use this listener to get the port
现在，在我的测试类中，我尝试使用此侦听器来获取端口
@SpringBootTest(classes = TestConfig.class, webEnvironment =WebEnvironment.RANDOM_PORT)
public class RestServiceTest {
protected int port;
@Autowired
EmbeddedServletContainerIntializedEventListener embeddedServletcontainerPort;
this.port = this.embeddedServletcontainerPort.getPort();
this returns 0. Also, I have found out listener event is never triggered.
这返回0。此外，我发现从未触发侦听器事件。
It is very straight forward as in the docs and other posts but somehow It is not working for me. Help is much appreciated.
它在文档和其他帖子中非常简单，但不知何故它对我不起作用。非常感谢帮助。
回答by Kevin Peters
Maybe you forgot to configure the random port for your test web environment.
也许您忘记为您的测试 Web 环境配置随机端口。
This should do the trick:
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
这应该可以解决问题：
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
Here a test just executed successfully with Spring Boot 1.5.2:
这是一个刚刚使用 Spring Boot 1.5.2 成功执行的测试：
import static org.hamcrest.Matchers.greaterThan;
import static org.junit.Assert.assertThat;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
public class RandomPortTests {
@Value("${local.server.port}")
protected int localPort;
@Test
public void getPort() {
assertThat("Should get a random port greater than zero!", localPort, greaterThan(0));
}
}
回答by Kin Cheung
You forgot to put @RunWith(SpringRunner.class)above your class decoration.
你忘了把@RunWith(SpringRunner.class)你的班级装饰放在上面。
So, try this.
所以，试试这个。
@RunWith(SpringRunner.class)
@SpringBootTest(classes = TestConfig.class, webEnvironment =WebEnvironment.DEFINED_PORT)
public class RestServiceTest {
@LocalServerPort
int randomServerPort;
...
}
