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.core.config;
  
  import org.apache.skywalking.oap.server.configuration.api.ConfigChangeWatcher;
  import org.apache.skywalking.oap.server.core.CoreModuleConfig;
  import org.apache.skywalking.oap.server.core.CoreModuleProvider;
  import org.apache.skywalking.oap.server.library.module.ModuleProvider;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import java.util.Arrays;
  import java.util.stream.Collectors;
  
  @ExtendWith(MockitoExtension.class)
  public class SearchableTracesTagsWatcherTest {
  
      private ModuleProvider provider;
      private CoreModuleConfig moduleConfig;
  
      private SearchableTracesTagsWatcher searchableTracesTagsWatcher;
  
      @BeforeEach
      public void init() {
          provider = new CoreModuleProvider();
          moduleConfig = new CoreModuleConfig();
  
          searchableTracesTagsWatcher = new SearchableTracesTagsWatcher(moduleConfig.getSearchableTracesTags(), provider);
      }
  
      @Test
      public void testGetDefaultSearchableTags() {
  
          Assertions.assertEquals(searchableTracesTagsWatcher.getSearchableTags(),
                  Arrays.stream(moduleConfig.getSearchableTracesTags().split(",")).collect(Collectors.toSet()));
      }
  
      @Test
      public void testNotify() {
  
          //add
          String addSearchableTracesTagsStr = moduleConfig.getSearchableTracesTags() + ",userId";
          ConfigChangeWatcher.ConfigChangeEvent addEvent =
                  new ConfigChangeWatcher.ConfigChangeEvent(addSearchableTracesTagsStr,
                          ConfigChangeWatcher.EventType.ADD);
  
          searchableTracesTagsWatcher.notify(addEvent);
  
          Assertions.assertEquals(searchableTracesTagsWatcher.getSearchableTags(),
                  Arrays.stream(addSearchableTracesTagsStr.split(",")).collect(Collectors.toSet()));
  
          //modify
          String modifySearchableTracesTagsStr = moduleConfig.getSearchableTracesTags() + ",userId,orderId";
          ConfigChangeWatcher.ConfigChangeEvent modifyEvent =
                  new ConfigChangeWatcher.ConfigChangeEvent(modifySearchableTracesTagsStr,
                          ConfigChangeWatcher.EventType.MODIFY);
  
          searchableTracesTagsWatcher.notify(modifyEvent);
  
          Assertions.assertEquals(searchableTracesTagsWatcher.getSearchableTags(),
                  Arrays.stream(modifySearchableTracesTagsStr.split(",")).collect(Collectors.toSet()));
  
          //delete
          ConfigChangeWatcher.ConfigChangeEvent deleteEvent =
                  new ConfigChangeWatcher.ConfigChangeEvent(null,
                          ConfigChangeWatcher.EventType.DELETE);
          searchableTracesTagsWatcher.notify(deleteEvent);
  
          Assertions.assertEquals(searchableTracesTagsWatcher.getSearchableTags(),
                  Arrays.stream(moduleConfig.getSearchableTracesTags().split(",")).collect(Collectors.toSet()));
      }
  
  }