content: /*
   * 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.cassandra.sidecar.cluster.locator;
  
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import org.junit.jupiter.api.Test;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  class InstanceSetByDcTest
  {
      @Test
      void testGetInstanceSetOfDc()
      {
          InstanceSetByDc empty = new InstanceSetByDc(new HashMap<>());
          assertThat(empty.get("dc1")).isNotNull().isEmpty();
  
          Map<String, Set<String>> mapping = new HashMap<>();
          mapping.put("dc1", new HashSet<>(Arrays.asList("i-1", "i-2")));
          InstanceSetByDc nonEmpty = new InstanceSetByDc(mapping);
          assertThat(nonEmpty.get("dc1")).hasSize(2);
          assertThat(nonEmpty.get("dc2")).isNotNull().isEmpty();
      }
  }
  