delete the demo source code and update the unit test

dubbo-config/dubbo-config-spring/src/test/java/org/apache/dubbo/config/spring/ConfigTest.java

@@ -107,12 +107,16 @@ public void testServiceClass() {
 
     @Test
     public void testServiceAnnotation() {
-        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(ConfigTest.class.getPackage().getName().replace('.', '/') + "/service-annotation.xml");
+        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(ConfigTest.class.getPackage().getName().replace('.', '/') + "/service-class.xml");
         ctx.start();
         try {
-            DemoService demoService = refer("dubbo://127.0.0.1:20887");
-            String hello = demoService.sayName("hello");
-            assertEquals("say:hello", hello);
+            ReferenceConfig<HelloService> reference = new ReferenceConfig<HelloService>();
+            reference.setApplication(new ApplicationConfig("consumer"));
+            reference.setRegistry(new RegistryConfig(RegistryConfig.NO_AVAILABLE));
+            reference.setInterface(HelloService.class);
+            reference.setUrl("dubbo://127.0.0.1:20887");
+            String hello = reference.get().sayHello("hello");
+            assertEquals("Hello, hello", hello);
         } finally {
             ctx.stop();
             ctx.close();

dubbo-config/dubbo-config-spring/src/test/java/org/apache/dubbo/config/spring/impl/HelloServiceImpl.java

@@ -16,8 +16,11 @@
  */
 package org.apache.dubbo.config.spring.impl;
 
+import org.apache.dubbo.config.annotation.Service;
 import org.apache.dubbo.config.spring.api.HelloService;
 
+
+@Service(interfaceName = "org.apache.dubbo.config.spring.api.HelloService")
 public class HelloServiceImpl implements HelloService {
 
     public String sayHello(String name) {

dubbo-config/dubbo-config-spring/src/test/resources/org/apache/dubbo/config/spring/service-class.xml

@@ -32,5 +32,6 @@
                    class="org.apache.dubbo.config.spring.impl.DemoServiceImpl">
         <property name="prefix" value="welcome:"/>
     </dubbo:service>
+    <dubbo:annotation package="org.apache.dubbo.config.spring.impl"/>
 
 </beans>