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.distributedlog.net;
  
  import static org.junit.Assert.assertEquals;
  
  import java.util.List;
  import org.apache.bookkeeper.net.DNSToSwitchMapping;
  import org.junit.Test;
  
  
  /**
   * Test Cases of {@link NetUtils}.
   */
  public class TestNetUtils {
  
      static class DNSResolverWithDefaultConstructor implements DNSToSwitchMapping {
  
          public DNSResolverWithDefaultConstructor() {}
  
          @Override
          public List<String> resolve(List<String> list) {
              return list;
          }
  
          @Override
          public void reloadCachedMappings() {
              // no-op
          }
      }
  
      static class DNSResolverWithUnknownConstructor implements DNSToSwitchMapping {
  
          public DNSResolverWithUnknownConstructor(int var1, int var2, int var3) {}
  
          @Override
          public List<String> resolve(List<String> list) {
              return list;
          }
  
          @Override
          public void reloadCachedMappings() {
              // no-op
          }
      }
  
      @Test(timeout = 20000)
      public void testGetDNSResolverWithOverrides() throws Exception {
          DNSToSwitchMapping dnsResolver =
                  NetUtils.getDNSResolver(DNSResolverForRacks.class, "");
          assertEquals("Should succeed to load " + DNSResolverForRacks.class,
                  dnsResolver.getClass(), DNSResolverForRacks.class);
      }
  
      @Test(timeout = 20000)
      public void testGetDNSResolverWithDefaultConstructor() throws Exception {
          DNSToSwitchMapping dnsResolver =
                  NetUtils.getDNSResolver(DNSResolverWithDefaultConstructor.class, "");
          assertEquals("Should succeed to load " + DNSResolverWithDefaultConstructor.class,
                  dnsResolver.getClass(), DNSResolverWithDefaultConstructor.class);
      }
  
      @Test(timeout = 20000, expected = RuntimeException.class)
      public void testGetDNSResolverWithUnknownConstructor() throws Exception {
          NetUtils.getDNSResolver(DNSResolverWithUnknownConstructor.class, "");
      }
  }
  