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.util.List;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.io.util.File;
  import org.apache.cassandra.io.util.FileUtils;
  import org.apache.cassandra.tools.Output;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatThrownBy;
  
  public class HistoryTest
  {
      public static File tempHistoryFile = FileUtils.createTempFile("test_nodetool", "history");
      public static File emptyHistoryFile = FileUtils.createTempFile("test_nodetool_empty", "history");
      public static List<String> listOfCommands = List.of("oldest command",
                                                          "older command",
                                                          "newer command",
                                                          "newest command");
  
      @BeforeClass
      public static void populateHistoryFile()
      {
          FileUtils.write(tempHistoryFile, listOfCommands);
      }
  
      @Test
      public void testHistory()
      {
          History history = new History()
          {
              @Override
              File getHistoryFile()
              {
                  return HistoryTest.tempHistoryFile;
              }
          };
  
          history.logger(Output.CONSOLE);
          File historyFile = history.getHistoryFile();
  
          assertThat(history.commandsToPrint(historyFile)).containsExactly(listOfCommands.toArray(new String[0]));
  
          history.commands = 2;
          assertThat(history.commandsToPrint(historyFile)).containsExactly(listOfCommands.subList(2, listOfCommands.size()).toArray(new String[0]));
  
          history.commands = 4;
          assertThat(history.commandsToPrint(historyFile)).containsExactly(listOfCommands.toArray(new String[0]));
      }
  
      @Test
      public void testEmptyHistory()
      {
          History history = new History()
          {
              @Override
              File getHistoryFile()
              {
                  return HistoryTest.emptyHistoryFile;
              }
          };
  
          history.logger(Output.CONSOLE);
          File historyFile = history.getHistoryFile();
  
          assertThat(history.commandsToPrint(historyFile)).isEmpty();
      }
  
  
      @Test
      public void testHistoryOutputOnNonExistingHistoryFile()
      {
          History history = new History()
          {
              @Override
              File getHistoryFile()
              {
                  return new File("/does/not/exist");
              }
          };
  
          history.logger(Output.CONSOLE);
  
          assertThatThrownBy(() -> history.execute(null))
          .isInstanceOf(IllegalStateException.class)
          .hasMessage("History file /does/not/exist does not exist.\n");
      }
  
      @Test
      public void testInvalidNumberOfCommandsToPrint()
      {
          History history = new History();
          history.commands = 0;
  
          assertThatThrownBy(() -> history.execute(null))
          .isInstanceOf(IllegalArgumentException.class)
          .hasMessage("Number of commands to display has to be at least 1.");
      }
  }
  