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.distributedlog;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import org.junit.Test;
  
  
  /**
   * Test Case for {@link EntryPosition}.
   */
  public class TestEntryPosition {
  
      private void checkPosition(EntryPosition position,
                                 long lssn,
                                 long entryId) {
          assertEquals(position.getLogSegmentSequenceNumber(), lssn);
          assertEquals(position.getEntryId(), entryId);
      }
  
      @Test
      public void testAdvance() {
          EntryPosition position = new EntryPosition(9L, 99L);
  
          checkPosition(position, 9L, 99L);
  
          // advance (8L, 100L) takes no effect
          assertFalse(position.advance(8L, 100L));
          checkPosition(position, 9L, 99L);
          // advance (9L, 98L) takes no effect
          assertFalse(position.advance(9L, 98L));
          checkPosition(position, 9L, 99L);
          // advance (9L, 99L) takes no effect
          assertFalse(position.advance(9L, 99L));
          checkPosition(position, 9L, 99L);
          // advance (9L, 100L) takes effects
          assertTrue(position.advance(9L, 100L));
          checkPosition(position, 9L, 100L);
          // advance (10L, 0L) takes effects
          assertTrue(position.advance(10L, 0L));
          checkPosition(position, 10L, 0L);
      }
  
  }
  