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 com.datastax.oss.driver.internal.core.loadbalancing.nodeset;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import com.datastax.oss.driver.api.core.metadata.Node;
  import org.junit.Test;
  
  public class MultiDcNodeSetTest {
  
    @Test
    public void should_add_node() {
      MultiDcNodeSet set = new MultiDcNodeSet();
      Node node1 = mockNode("dc1");
      assertThat(set.add(node1)).isTrue();
      assertThat(set.add(node1)).isFalse();
      Node node2 = mockNode("dc2");
      assertThat(set.add(node2)).isTrue();
      assertThat(set.add(node2)).isFalse();
    }
  
    @Test
    public void should_remove_node() {
      MultiDcNodeSet set = new MultiDcNodeSet();
      Node node1 = mockNode("dc1");
      set.add(node1);
      assertThat(set.remove(node1)).isTrue();
      assertThat(set.remove(node1)).isFalse();
      Node node2 = mockNode("dc2");
      set.add(node2);
      assertThat(set.remove(node2)).isTrue();
      assertThat(set.remove(node2)).isFalse();
    }
  
    @Test
    public void should_return_all_nodes_in_dc() {
      MultiDcNodeSet set = new MultiDcNodeSet();
      Node node1 = mockNode("dc1");
      set.add(node1);
      Node node2 = mockNode("dc1");
      set.add(node2);
      Node node3 = mockNode("dc2");
      set.add(node3);
      assertThat(set.dc("dc1")).contains(node1, node2);
      assertThat(set.dc("dc2")).contains(node3);
      assertThat(set.dc("dc3")).isEmpty();
      assertThat(set.dc(null)).isEmpty();
    }
  
    @Test
    public void should_return_all_dcs() {
      MultiDcNodeSet set = new MultiDcNodeSet();
      Node node1 = mockNode("dc1");
      set.add(node1);
      Node node2 = mockNode("dc2");
      set.add(node2);
      assertThat(set.dcs()).contains("dc1", "dc2");
    }
  
    private Node mockNode(String dc) {
      Node node = mock(Node.class);
      when(node.getDatacenter()).thenReturn(dc);
      return node;
    }
  }
  