Polish apache#4905 : Add test cases for AbstractDynamicConfigurationF…

…actory

dubbo-common/src/main/java/org/apache/dubbo/common/config/configcenter/AbstractDynamicConfigurationFactory.java

@@ -24,14 +24,17 @@
 import static org.apache.dubbo.common.constants.CommonConstants.DEFAULT_KEY;
 
 /**
+ * Abstract {@link DynamicConfigurationFactory} implementation with cache ability
  *
+ * @see DynamicConfigurationFactory
+ * @since 2.7.4
  */
 public abstract class AbstractDynamicConfigurationFactory implements DynamicConfigurationFactory {
 
     private volatile Map<String, DynamicConfiguration> dynamicConfigurations = new ConcurrentHashMap<>();
 
     @Override
-    public DynamicConfiguration getDynamicConfiguration(URL url) {
+    public final DynamicConfiguration getDynamicConfiguration(URL url) {
         String key = url == null ? DEFAULT_KEY : url.getAddress();
         return dynamicConfigurations.computeIfAbsent(key, k -> createDynamicConfiguration(url));
     }

dubbo-common/src/test/java/org/apache/dubbo/common/config/configcenter/AbstractDynamicConfigurationFactoryTest.java

@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.dubbo.common.config.configcenter;
+
+import org.apache.dubbo.common.URL;
+import org.apache.dubbo.common.config.configcenter.nop.NopDynamicConfiguration;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * {@link AbstractDynamicConfigurationFactory} Test
+ *
+ * @see AbstractDynamicConfigurationFactory
+ * @since 2.7.4
+ */
+public class AbstractDynamicConfigurationFactoryTest {
+
+    private AbstractDynamicConfigurationFactory factory;
+
+    @BeforeEach
+    public void init() {
+        factory = new AbstractDynamicConfigurationFactory() {
+            @Override
+            protected DynamicConfiguration createDynamicConfiguration(URL url) {
+                return new NopDynamicConfiguration(url);
+            }
+        };
+    }
+
+    @Test
+    public void testGetDynamicConfiguration() {
+        URL url = URL.valueOf("nop://127.0.0.1");
+        assertEquals(factory.getDynamicConfiguration(url), factory.getDynamicConfiguration(url));
+    }
+}