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.tools.nodetool;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.PrintStream;
  import java.nio.charset.StandardCharsets;
  import java.util.Collections;
  import java.util.List;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.CQLTester;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.net.Message;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.net.NoPayload;
  import org.apache.cassandra.schema.TableId;
  import org.apache.cassandra.streaming.SessionInfo;
  import org.apache.cassandra.streaming.StreamSession.State;
  import org.apache.cassandra.streaming.StreamSummary;
  import org.apache.cassandra.tools.ToolRunner;
  import org.apache.cassandra.utils.FBUtilities;
  
  import static java.util.Collections.emptyList;
  import static org.apache.cassandra.net.Verb.ECHO_REQ;
  import static org.assertj.core.api.Assertions.assertThat;
  
  public class NetStatsTest extends CQLTester
  {
      @BeforeClass
      public static void setup() throws Exception
      {
          requireNetwork();
          startJMXServer();
      }
  
      @Test
      public void testNetStats()
      {
          Message<NoPayload> echoMessageOut = Message.out(ECHO_REQ, NoPayload.noPayload);
          MessagingService.instance().send(echoMessageOut, FBUtilities.getBroadcastAddressAndPort());
  
          ToolRunner.ToolResult tool = ToolRunner.invokeNodetool("netstats");
          tool.assertOnCleanExit();
          assertThat(tool.getStdout()).contains("Gossip messages                 n/a         0              2         0");
      }
  
      @Test
      public void testHumanReadable() throws IOException
      {
          List<StreamSummary> streamSummaries = Collections.singletonList(new StreamSummary(TableId.generate(), emptyList(), 1, 1024));
          SessionInfo info = new SessionInfo(InetAddressAndPort.getLocalHost(),
                                             1,
                                             InetAddressAndPort.getLocalHost(),
                                             streamSummaries,
                                             streamSummaries,
                                             State.COMPLETE,
                                             null);
  
          try (ByteArrayOutputStream baos = new ByteArrayOutputStream(); PrintStream out = new PrintStream(baos))
          {
              NetStats nstats = new NetStats();
  
              nstats.printReceivingSummaries(out, info, false);
              String stdout = getSummariesStdout(baos, out);
              assertThat(stdout).doesNotContain("Kib");
  
              baos.reset();
              nstats.printSendingSummaries(out, info, false);
              stdout = getSummariesStdout(baos, out);
              assertThat(stdout).doesNotContain("Kib");
  
              baos.reset();
              nstats.printReceivingSummaries(out, info, true);
              stdout = getSummariesStdout(baos, out);
              assertThat(stdout).contains("KiB");
  
              baos.reset();
              nstats.printSendingSummaries(out, info, true);
              stdout = getSummariesStdout(baos, out);
              assertThat(stdout).contains("KiB");
          }
      }
  
      private String getSummariesStdout(ByteArrayOutputStream baos, PrintStream ps) throws IOException
      {
          baos.flush();
          ps.flush();
          return baos.toString(StandardCharsets.UTF_8.toString());
      }
  }
  