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.cluster;
  
  import com.google.common.collect.Lists;
  import org.apache.skywalking.oap.server.core.CoreModuleConfig;
  import org.apache.skywalking.oap.server.core.remote.client.Address;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class OAPNodeCheckerTest {
  
      @Test
      public void hasIllegalNodeAddressWithNull() {
          boolean flag = OAPNodeChecker.hasIllegalNodeAddress(null);
          Assertions.assertFalse(flag);
      }
  
      @Test
      public void hasIllegalNodeAddressWithEmptySet() {
          boolean flag = OAPNodeChecker.hasIllegalNodeAddress(Lists.newArrayList());
          Assertions.assertFalse(flag);
      }
  
      @Test
      public void hasIllegalNodeAddressTrue() {
          List<RemoteInstance> remoteInstances = new ArrayList<>();
          remoteInstances.add(new RemoteInstance(new Address("127.0.0.1", 8899, true)));
          remoteInstances.add(new RemoteInstance(new Address("123.23.4.2", 8899, true)));
          boolean flag = OAPNodeChecker.hasIllegalNodeAddress(remoteInstances);
          Assertions.assertTrue(flag);
      }
  
      @Test
      public void hasIllegalNodeAddressFalse() {
          List<RemoteInstance> remoteInstances = new ArrayList<>();
          remoteInstances.add(new RemoteInstance(new Address("123.23.4.2", 8899, true)));
          boolean flag = OAPNodeChecker.hasIllegalNodeAddress(remoteInstances);
          Assertions.assertFalse(flag);
      }
  
      @Test
      public void unHealthWithEmptyInstance() {
          ClusterHealthStatus clusterHealthStatus = OAPNodeChecker.isHealth(Lists.newArrayList());
          Assertions.assertFalse(clusterHealthStatus.isHealth());
      }
  
      @Test
      public void unHealthWithNullInstance() {
          ClusterHealthStatus clusterHealthStatus = OAPNodeChecker.isHealth(null);
          Assertions.assertFalse(clusterHealthStatus.isHealth());
      }
  
      @Test
      public void unHealthWithEmptySelfInstance() {
          List<RemoteInstance> remoteInstances = new ArrayList<>();
          remoteInstances.add(new RemoteInstance(new Address("192.168.0.1", 8892, false)));
          ClusterHealthStatus clusterHealthStatus = OAPNodeChecker.isHealth(remoteInstances);
          Assertions.assertFalse(clusterHealthStatus.isHealth());
      }
  
      @Test
      public void unHealthWithIllegalNodeInstance() {
          List<RemoteInstance> remoteInstances = new ArrayList<>();
          remoteInstances.add(new RemoteInstance(new Address("192.168.0.1", 8892, true)));
          remoteInstances.add(new RemoteInstance(new Address("127.0.0.1", 8892, true)));
          ClusterHealthStatus clusterHealthStatus = OAPNodeChecker.isHealth(remoteInstances);
          Assertions.assertFalse(clusterHealthStatus.isHealth());
      }
  
      @Test
      public void healthWithOnlySelf() {
          List<RemoteInstance> remoteInstances = new ArrayList<>();
          remoteInstances.add(new RemoteInstance(new Address("127.0.0.1", 8899, true)));
          ClusterHealthStatus clusterHealthStatus = OAPNodeChecker.isHealth(remoteInstances);
          Assertions.assertTrue(clusterHealthStatus.isHealth());
      }
  
      @Test
      public void healthWithSelfAndNodes() {
          List<RemoteInstance> remoteInstances = new ArrayList<>();
          remoteInstances.add(new RemoteInstance(new Address("192.168.0.1", 8899, true)));
          remoteInstances.add(new RemoteInstance(new Address("192.168.0.2", 8899, false)));
          ClusterHealthStatus clusterHealthStatus = OAPNodeChecker.isHealth(remoteInstances);
          Assertions.assertTrue(clusterHealthStatus.isHealth());
      }
  
      @Test
      public void healthWhenReceiverRoleWithEmptySelfInstance() {
          List<RemoteInstance> remoteInstances = new ArrayList<>();
          remoteInstances.add(new RemoteInstance(new Address("192.168.0.1", 8892, false)));
          OAPNodeChecker.setROLE(CoreModuleConfig.Role.Receiver);
          ClusterHealthStatus clusterHealthStatus = OAPNodeChecker.isHealth(remoteInstances);
          Assertions.assertTrue(clusterHealthStatus.isHealth());
      }
  }
  