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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.
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  package org.apache.cassandra.tools;
  
  import java.util.Arrays;
  
  import org.junit.Test;
  
  import org.apache.cassandra.tools.ToolRunner.ToolResult;
  import org.assertj.core.api.Assertions;
  import org.hamcrest.CoreMatchers;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertThat;
  
  public class StandaloneUpgraderTest extends OfflineToolUtils
  {
      @Test
      public void testMaybeChangeDocs()
      {
          // If you added, modified options or help, please update docs if necessary
          ToolResult tool = ToolRunner.invokeClass(StandaloneUpgrader.class, "-h");
          String help = "usage: sstableupgrade [options] <keyspace> <cf> [snapshot]\n" + 
                         "--\n" + 
                         "Upgrade the sstables in the given cf (or snapshot) to the current version\n" + 
                         "of Cassandra.This operation will rewrite the sstables in the specified cf\n" + 
                         "to match the currently installed version of Cassandra.\n" + 
                         "The snapshot option will only upgrade the specified snapshot. Upgrading\n" + 
                         "snapshots is required before attempting to restore a snapshot taken in a\n" + 
                         "major version older than the major version Cassandra is currently running.\n" + 
                         "This will replace the files in the given snapshot as well as break any\n" + 
                         "hard links to live sstables.\n" + 
                         "--\n" + 
                         "Options are:\n" + 
                         "    --debug         display stack traces\n" + 
                         " -h,--help          display this help message\n" + 
                         " -k,--keep-source   do not delete the source sstables\n";
          Assertions.assertThat(tool.getStdout()).isEqualTo(help);
      }
  
      @Test
      public void testWrongArgFailsAndPrintsHelp()
      {
          ToolResult tool = ToolRunner.invokeClass(StandaloneUpgrader.class, "--debugwrong", "system_schema", "tables");
          assertThat(tool.getStdout(), CoreMatchers.containsStringIgnoringCase("usage:"));
          assertThat(tool.getCleanedStderr(), CoreMatchers.containsStringIgnoringCase("Unrecognized option"));
          assertEquals(1, tool.getExitCode());
      }
  
      @Test
      public void testDefaultCall()
      {
          ToolResult tool = ToolRunner.invokeClass(StandaloneUpgrader.class, "system_schema", "tables");
          Assertions.assertThat(tool.getStdout()).isEqualTo("Found 0 sstables that need upgrading.\n");
          Assertions.assertThat(tool.getCleanedStderr()).isEmpty();
          assertEquals(0, tool.getExitCode());
          assertCorrectEnvPostTest();
      }
  
      @Test
      public void testFlagArgs()
      {
          Arrays.asList("--debug", "-k", "--keep-source").forEach(arg -> {
              ToolResult tool = ToolRunner.invokeClass(StandaloneUpgrader.class,
                                                         arg,
                                                         "system_schema",
                                                         "tables");
              Assertions.assertThat(tool.getStdout()).as("Arg: [%s]", arg).isEqualTo("Found 0 sstables that need upgrading.\n");
              Assertions.assertThat(tool.getCleanedStderr()).as("Arg: [%s]", arg).isEmpty();
              assertEquals(0, tool.getExitCode());
              assertCorrectEnvPostTest();
          });
      }
  
      @Test
      public void testHelpArg()
      {
          Arrays.asList("-h", "--help").forEach(arg -> {
              ToolResult tool = ToolRunner.invokeClass(StandaloneUpgrader.class, arg);
              Assertions.assertThat(tool.getStdout()).as("Arg: [%s]", arg).isNotEmpty();
              Assertions.assertThat(tool.getCleanedStderr()).as("Arg: [%s]", arg).isEmpty();
              tool.assertOnExitCode();
              assertCorrectEnvPostTest();
          });
      }
  }
  