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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.ArrayList;
  import java.util.List;
  import java.util.Optional;
  
  import com.google.common.base.Joiner;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.CQLTester;
  import org.apache.cassandra.schema.SchemaConstants;
  
  import static java.lang.String.format;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  
  public class LegacyAuthFailTest extends CQLTester
  {
      @Test
      public void testStartupChecks() throws Throwable
      {
          List<String> legacyTables = new ArrayList<>(SchemaConstants.LEGACY_AUTH_TABLES);
  
          // test reporting for individual tables
          for (String legacyTable : legacyTables)
          {
              createLegacyTable(legacyTable);
  
              Optional<String> errMsg = StartupChecks.checkLegacyAuthTablesMessage();
              assertEquals(format("Legacy auth tables %s in keyspace %s still exist and have not been properly migrated.",
                                  legacyTable,
                                  SchemaConstants.AUTH_KEYSPACE_NAME), errMsg.get());
              dropLegacyTable(legacyTable);
          }
  
          // test reporting of multiple existing tables
          for (String legacyTable : legacyTables)
              createLegacyTable(legacyTable);
  
          while (!legacyTables.isEmpty())
          {
              Optional<String> errMsg = StartupChecks.checkLegacyAuthTablesMessage();
              assertEquals(format("Legacy auth tables %s in keyspace %s still exist and have not been properly migrated.",
                                  Joiner.on(", ").join(legacyTables),
                                  SchemaConstants.AUTH_KEYSPACE_NAME), errMsg.get());
  
              dropLegacyTable(legacyTables.remove(0));
          }
  
          // no legacy tables found
          Optional<String> errMsg = StartupChecks.checkLegacyAuthTablesMessage();
          assertFalse(errMsg.isPresent());
      }
  
      private void dropLegacyTable(String legacyTable) throws Throwable
      {
          execute(format("DROP TABLE %s.%s", SchemaConstants.AUTH_KEYSPACE_NAME, legacyTable));
      }
  
      private void createLegacyTable(String legacyTable) throws Throwable
      {
          execute(format("CREATE TABLE %s.%s (id int PRIMARY KEY, val text)", SchemaConstants.AUTH_KEYSPACE_NAME, legacyTable));
      }
  }
  