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.nacos;
  
  import com.alibaba.nacos.api.config.ConfigService;
  import com.alibaba.nacos.api.exception.NacosException;
  import com.google.common.collect.Sets;
  import org.apache.skywalking.oap.server.configuration.api.ConfigTable;
  import org.junit.jupiter.api.Test;
  import org.powermock.reflect.Whitebox;
  
  import java.util.HashMap;
  import java.util.Map;
  
  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 NacosConfigWatcherRegisterTest {
      @Test
      public void shouldReadConfigs() throws NacosException {
          final String group = "skywalking";
          final String testKey1 = "agent-analyzer.default.slowDBAccessThreshold";
          final String testVal1 = "test";
          final String testKey2 = "testKey";
          final String testVal2 = "testVal";
  
          final NacosServerSettings mockSettings = mock(NacosServerSettings.class);
          when(mockSettings.getGroup()).thenReturn(group);
          when(mockSettings.getNamespace()).thenReturn("");
  
          final NacosConfigWatcherRegister mockRegister = spy(new NacosConfigWatcherRegister(mockSettings));
          final ConfigService mockConfigService = mock(ConfigService.class);
          when(mockConfigService.getConfig(testKey1, group, 1000)).thenReturn(testVal1);
          when(mockConfigService.getConfig(testKey2, group, 1000)).thenReturn(testVal2);
  
          Whitebox.setInternalState(mockRegister, "configService", mockConfigService);
  
          final ConfigTable configTable = mockRegister.readConfig(Sets.newHashSet(testKey1, testKey2)).get();
  
          assertEquals(2, configTable.getItems().size());
          Map<String, String> kvs = new HashMap<>();
          for (ConfigTable.ConfigItem item : configTable.getItems()) {
              kvs.put(item.getName(), item.getValue());
          }
          assertEquals(testVal1, kvs.get(testKey1));
          assertEquals(testVal2, kvs.get(testKey2));
      }
  }
  