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 org.apache.commons.lang3.StringUtils;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.CQLTester;
  import org.apache.cassandra.service.GCInspector;
  import org.apache.cassandra.tools.ToolRunner;
  import org.apache.cassandra.tools.ToolRunner.ToolResult;
  import org.apache.cassandra.tools.nodetool.stats.GcStatsHolder;
  import org.apache.cassandra.utils.JsonUtils;
  import org.yaml.snakeyaml.Yaml;
  
  import static java.lang.Double.parseDouble;
  import static java.util.Arrays.asList;
  import static org.apache.cassandra.tools.nodetool.stats.GcStatsHolder.MAX_DIRECT_MEMORY;
  import static org.apache.cassandra.tools.nodetool.stats.GcStatsHolder.RESERVED_DIRECT_MEMORY;
  import static org.apache.cassandra.tools.nodetool.stats.GcStatsHolder.ALLOCATED_DIRECT_MEMORY;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatCode;
  
  public class GcStatsTest extends CQLTester
  {
      @BeforeClass
      public static void setUp() throws Exception
      {
          requireNetwork();
          startJMXServer();
          GCInspector.register();
      }
  
      @Test
      public void testDefaultGcStatsOutput()
      {
          ToolResult tool = ToolRunner.invokeNodetool("gcstats");
          tool.assertOnCleanExit();
          String output = tool.getStdout();
          for (String value : GcStatsHolder.columnDescriptionMap.values())
              assertThat(output).contains(value);
      }
  
      @Test
      public void testJsonGcStatsOutput()
      {
          asList("-F", "--format").forEach(arg -> {
              ToolResult tool = ToolRunner.invokeNodetool("gcstats", arg, "json");
              tool.assertOnCleanExit();
              String json = tool.getStdout();
              assertThatCode(() -> JsonUtils.JSON_OBJECT_MAPPER.readTree(json)).doesNotThrowAnyException();
  
              for (String key : GcStatsHolder.columnDescriptionMap.keySet())
                  assertThat(json).contains(key);
          });
      }
  
      @Test
      public void testYamlGcStatsOutput()
      {
          asList("-F", "--format").forEach(arg -> {
              ToolResult tool = ToolRunner.invokeNodetool("gcstats", arg, "yaml");
              tool.assertOnCleanExit();
              String yamlOutput = tool.getStdout();
              Yaml yaml = new Yaml();
              assertThatCode(() -> yaml.load(yamlOutput)).doesNotThrowAnyException();
  
              for (String key : GcStatsHolder.columnDescriptionMap.keySet())
                  assertThat(yamlOutput).containsPattern(key);
          });
      }
  
      @Test
      public void testInvalidFormatOption()
      {
          ToolResult tool = ToolRunner.invokeNodetool("gcstats", "-F", "invalid_format");
          assertThat(tool.getExitCode()).isEqualTo(1);
          assertThat(tool.getStdout()).contains("arguments for -F are json, yaml, table only.");
      }
  
      @Test
      public void testWithoutNoOption()
      {
          ToolResult tool = ToolRunner.invokeNodetool("gcstats");
          tool.assertOnCleanExit();
  
          for (String value : GcStatsHolder.columnDescriptionMap.values())
              assertThat(tool.getStdout()).contains(value);
      }
  
      @Test
      public void testWithHumanReadableOption()
      {
          ToolResult tool = ToolRunner.invokeNodetool("gcstats", "--human-readable", "-F", "table");
          tool.assertOnCleanExit();
          String gcStatsOutput = tool.getStdout();
  
          for (String value : GcStatsHolder.columnDescriptionMap.values())
              assertThat(tool.getStdout()).contains(value);
  
          String total = StringUtils.substringBetween(gcStatsOutput, GcStatsHolder.columnDescriptionMap.get(ALLOCATED_DIRECT_MEMORY), "\n").trim();
          assertThat(parseDouble(total.split(" ")[0])).isGreaterThan(0);
          String max = StringUtils.substringBetween(gcStatsOutput, GcStatsHolder.columnDescriptionMap.get(MAX_DIRECT_MEMORY), "\n").trim();
          assertThat(parseDouble(max.split(" ")[0])).isGreaterThan(0);
          String reserved = StringUtils.substringBetween(gcStatsOutput, GcStatsHolder.columnDescriptionMap.get(RESERVED_DIRECT_MEMORY), "\n").trim();
          assertThat(parseDouble(reserved.split(" ")[0])).isGreaterThan(0);
      }
  }