content: /*
   * Copyright (c) 2019, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package testsuite.simple;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import org.junit.jupiter.api.Test;
  
  import com.mysql.cj.util.SequentialIdLease;
  
  import testsuite.BaseTestCase;
  
  public class SequentialIdLeaseTest extends BaseTestCase {
      /**
       * Tests the {@link SequentialIdLease} lease behavior.
       */
      @Test
      public void testSequentialIdLease() {
          SequentialIdLease seqIdLease;
  
          // Release first.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(1);
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
  
          // Release single id in middle.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(2);
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
  
          // Release last.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(3);
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
  
          // Release multiple in the beginning.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(1);
          seqIdLease.releaseSequentialId(2);
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(5, seqIdLease.allocateSequentialId());
  
          // Release multiple in the middle.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(2);
          seqIdLease.releaseSequentialId(3);
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(5, seqIdLease.allocateSequentialId());
  
          // Release multiple in the end.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(3);
          seqIdLease.releaseSequentialId(4);
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
          assertEquals(5, seqIdLease.allocateSequentialId());
  
          // Release interleaved.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(4, seqIdLease.allocateSequentialId());
          assertEquals(5, seqIdLease.allocateSequentialId());
          assertEquals(6, seqIdLease.allocateSequentialId());
          assertEquals(7, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(1);
          seqIdLease.releaseSequentialId(3);
          seqIdLease.releaseSequentialId(5);
          seqIdLease.releaseSequentialId(7);
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          assertEquals(5, seqIdLease.allocateSequentialId());
          assertEquals(7, seqIdLease.allocateSequentialId());
          assertEquals(8, seqIdLease.allocateSequentialId());
  
          // Release all.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(1);
          seqIdLease.releaseSequentialId(2);
          seqIdLease.releaseSequentialId(3);
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
  
          // Release non-existing.
          seqIdLease = new SequentialIdLease();
          assertEquals(1, seqIdLease.allocateSequentialId());
          assertEquals(2, seqIdLease.allocateSequentialId());
          assertEquals(3, seqIdLease.allocateSequentialId());
          seqIdLease.releaseSequentialId(4);
          assertEquals(4, seqIdLease.allocateSequentialId());
  
          // Release from empty SequentialIdLease.
          seqIdLease = new SequentialIdLease();
          seqIdLease.releaseSequentialId(1);
      }
  }
  