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SpringBoot集成Jersey的单元测试方案

使用SpringBoot集成Jersey做单元测试时遇到了application.xml找不到的提示。详情如下：

Caused by: java.io.FileNotFoundException: class path resource [applicationContext.xml] cannot be opened because it does not exist
	at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172)
	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:330)
	... 61 more

测试使用的代码大致如下：

import com.zhyea.jspy.QueryServiceApplication;
import com.zhyea.jspy.bean.Probe;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import javax.ws.rs.core.Application;


@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = MySpringApplication.class)
public class MyResourceTest extends JerseyTest {

    @Override
    protected Application configure() {
        return new ResourceConfig(MyResource.class);
    }

    @Test
    public void testGet() {
        final Probe p = target("/api/probe/get/106").request().get(Probe.class);
        System.out.println(p);
    }
}

原因是SpringBoot的Context和Jersey的Context是不同的。要修复这个问题可以基于SpringBoot的Context来构建测试时Jersey的Context，但是这样做也会遇到一些问题。具体什么问题懒得说了。直接说解决方案：跳过Jersey的Context，不使用JerseyTest抽象类，直接自行创建WebTarget实例。

看一个测试超类代码示例好了：

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = MyApplication.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class JerseyTestBase {

	private static Logger logger = LoggerFactory.getLogger(JerseyTestBase.class);

	@Value("${local.server.port}")
	private int port;


	public Response get(String path) {
		Client client = ClientBuilder.newClient();
		WebTarget target = client.target("http://localhost:" + port + "/api" + path);
		return target.request(MediaType.APPLICATION_JSON).accept(MediaType.APPLICATION_JSON).get();
	}

}

就这样。

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原文 http://www.zhyea.com/2017/09/27/unit-test-with-spring-integrate-jersey.html

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