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   * 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.service;
  
  import java.util.Map;
  
  import org.junit.Before;
  import org.junit.Test;
  
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.tcm.membership.Directory;
  import org.apache.cassandra.tcm.membership.Location;
  import org.apache.cassandra.tcm.membership.MembershipUtils;
  import org.apache.cassandra.tcm.membership.NodeAddresses;
  import org.apache.cassandra.tcm.membership.NodeId;
  import org.apache.cassandra.tcm.transformations.AlterTopology;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  
  public class AlterTopologyArgParsingTest
  {
      Location loc = new Location("test_dc", "test_rack");
      NodeId id = new NodeId(1);
      Directory dir;
  
      @Before
      public void setup()
      {
          dir = new Directory();
      }
  
      @Test
      public void testSingleChangeByInt()
      {
          String arg = "1=test_dc:test_rack";
          Map<NodeId, Location> parsed = AlterTopology.parseArgs(arg, dir);
          assertEquals(1, parsed.size());
          assertEquals(parsed.get(id), loc);
      }
  
      @Test
      public void testSingleChangeByUUID()
      {
          String arg = String.format("%s=test_dc:test_rack", id.toUUID().toString());
          Map<NodeId, Location> parsed = AlterTopology.parseArgs(arg, dir);
          assertEquals(1, parsed.size());
          assertEquals(parsed.get(id), loc);
      }
  
      @Test
      public void testSingleChangeByEndpoint()
      {
          InetAddressAndPort ep = MembershipUtils.endpoint(1);
          dir = dir.with(new NodeAddresses(ep), loc); // this will associate NodeId(1) with ep
          String arg = String.format("%s=test_dc:test_rack", ep.getHostAddressAndPort());
          Map<NodeId, Location> parsed = AlterTopology.parseArgs(arg, dir);
          assertEquals(1, parsed.size());
          assertEquals(parsed.get(id), loc);
      }
  
      @Test
      public void testSingleChangeByEndpointAddress()
      {
          InetAddressAndPort ep = MembershipUtils.endpoint(1);
          dir = dir.with(new NodeAddresses(ep), loc); // this will associate NodeId(1) with ep
          String arg = String.format("%s=test_dc:test_rack", ep.getHostAddress(false));
          Map<NodeId, Location> parsed = AlterTopology.parseArgs(arg, dir);
          assertEquals(1, parsed.size());
          assertEquals(parsed.get(id), loc);
      }
  
      @Test
      public void testInvalidArg()
      {
          String[] args = new String[]{ "invalid", "1=", "=dc:rack", "1=dc", "1=dc:" };
          for (String invalid : args)
          {
              try
              {
                  AlterTopology.parseArgs(invalid, dir);
                  fail("Expected exception");
              }
              catch (IllegalArgumentException e)
              {
              }
          }
      }
  
      @Test
      public void testMultipleChanges()
      {
          NodeId otherId = new NodeId(2);
          InetAddressAndPort ep = MembershipUtils.endpoint(1);
          dir = dir.with(new NodeAddresses(ep), loc); // this will associate NodeId(1) with ep
          String arg = String.format("%s=dc1:rack1,%s=dc2:rack2,3=dc3:rack3,",
                                     ep.getHostAddress(true),
                                     otherId.toUUID().toString());
          Map<NodeId, Location> parsed = AlterTopology.parseArgs(arg, dir);
          assertEquals(3, parsed.size());
          assertEquals(parsed.get(id).datacenter, "dc1");
          assertEquals(parsed.get(id).rack, "rack1");
          assertEquals(parsed.get(otherId).datacenter, "dc2");
          assertEquals(parsed.get(otherId).rack, "rack2");
          assertEquals(parsed.get(new NodeId(3)).datacenter, "dc3");
          assertEquals(parsed.get(new NodeId(3)).rack, "rack3");
      }
  
      @Test
      public void testMultipleChangesForSameNode()
      {
          InetAddressAndPort ep = MembershipUtils.endpoint(1);
          dir = dir.with(new NodeAddresses(ep), loc); // this will associate NodeId(1) with ep
          String epString = ep.getHostAddress(true);
          String idString = id.toUUID().toString();
          assertIllegalArgument(String.format("%1$s=dc1:rack1,%1$s=dc2:rack2", id.id()));
          assertIllegalArgument(String.format("%s=dc1:rack1,%s=dc2:rack2", id.id(), idString));
          assertIllegalArgument(String.format("%s=dc1:rack1,%s=dc2:rack2", id.id(), epString));
          assertIllegalArgument(String.format("%1$s=dc1:rack1,%1$s=dc2:rack2", epString));
          assertIllegalArgument(String.format("%1$s=dc1:rack1,%1$s=dc2:rack2", idString));
          assertIllegalArgument(String.format("%s=dc1:rack1,%s=dc2:rack2,%s=dc3:rack3", id.id(), idString, epString));
      }
  
      private void assertIllegalArgument(String arg)
      {
         try
         {
             AlterTopology.parseArgs(arg, dir);
             fail("Expected exception");
         }
         catch (IllegalArgumentException e) {}
      }
  }
  