code: /*
   * 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.skywalking.oap.server.configuration.zookeeper.ut;
  
  import com.google.common.collect.Sets;
  import org.apache.curator.framework.recipes.cache.ChildData;
  import org.apache.curator.framework.recipes.cache.PathChildrenCache;
  import org.apache.skywalking.oap.server.configuration.api.ConfigTable;
  import org.apache.skywalking.oap.server.configuration.zookeeper.ZookeeperServerSettings;
  import org.junit.jupiter.api.Test;
  import org.powermock.reflect.Whitebox;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.spy;
  import static org.mockito.Mockito.when;
  
  public class ZookeeperConfigWatcherRegisterTestCase {
      @Test
      public void TestCase() throws Exception {
          final String namespace = "/default";
          final String key = "agent-analyzer.default.slowDBAccessThreshold";
          final String value = "default:100,mongodb:50";
  
          final ZookeeperServerSettings mockSettings = mock(ZookeeperServerSettings.class);
          when(mockSettings.getNamespace()).thenReturn(namespace);
  
          final MockZookeeperConfigWatcherRegister mockRegister = spy(new MockZookeeperConfigWatcherRegister(mockSettings));
          final PathChildrenCache mockPathChildrenCache = mock(PathChildrenCache.class);
          when(mockPathChildrenCache.getCurrentData(namespace + "/" + key)).thenReturn(new ChildData(namespace + "/" + key, null, value
              .getBytes()));
  
          Whitebox.setInternalState(mockRegister, "childrenCache", mockPathChildrenCache);
  
          final ConfigTable configTable = mockRegister.readConfig(Sets.newHashSet(key)).get();
  
          assertEquals(1, configTable.getItems().size());
          assertEquals(key, configTable.getItems().get(0).getName());
          assertEquals(value, configTable.getItems().get(0).getValue());
      }
  }
  