content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * Licensed 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
   *
   * https://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.agrona.concurrent.status;
  
  import org.agrona.concurrent.UnsafeBuffer;
  import org.junit.jupiter.api.Test;
  
  import java.nio.ByteBuffer;
  
  import static org.agrona.concurrent.status.CountersReader.COUNTER_LENGTH;
  import static org.junit.jupiter.api.Assertions.*;
  
  class UnsafeBufferPositionTest
  {
  
      @Test
      void shouldWrapDirectBuffer()
      {
          final UnsafeBuffer buffer = new UnsafeBuffer(ByteBuffer.allocateDirect(5 * COUNTER_LENGTH));
          final long value = 12362863812378L;
          final int counterId = 2;
  
          try (UnsafeBufferPosition position = new UnsafeBufferPosition(buffer, counterId, null))
          {
              position.set(value);
              position.proposeMax(value + 42);
              assertEquals(value + 42, position.get());
          }
      }
  
      @Test
      void testPlain()
      {
          final UnsafeBuffer buffer = new UnsafeBuffer(ByteBuffer.allocateDirect(5 * COUNTER_LENGTH));
          final int counterId = 2;
  
          try (UnsafeBufferPosition position = new UnsafeBufferPosition(buffer, counterId, null))
          {
              position.set(10);
              assertEquals(10, position.get());
  
              assertFalse(position.proposeMax(5));
              assertEquals(10, position.get());
              assertTrue(position.proposeMax(100));
              assertEquals(100, position.get());
          }
      }
  
      @Test
      void testVolatile()
      {
          final UnsafeBuffer buffer = new UnsafeBuffer(ByteBuffer.allocateDirect(5 * COUNTER_LENGTH));
          final int counterId = 2;
  
          try (UnsafeBufferPosition position = new UnsafeBufferPosition(buffer, counterId, null))
          {
              position.setVolatile(10);
              assertEquals(10, position.getVolatile());
  
  
          }
      }
  
      @Test
      void testAcquireRelease()
      {
          final UnsafeBuffer buffer = new UnsafeBuffer(ByteBuffer.allocateDirect(5 * COUNTER_LENGTH));
          final int counterId = 2;
  
          try (UnsafeBufferPosition position = new UnsafeBufferPosition(buffer, counterId, null))
          {
              position.setRelease(10);
              assertEquals(10, position.getAcquire());
  
              assertFalse(position.proposeMaxRelease(5));
              assertEquals(10, position.getOpaque());
              assertTrue(position.proposeMaxRelease(100));
              assertEquals(100, position.getAcquire());
          }
      }
  
      @Test
      void testOpaque()
      {
          final UnsafeBuffer buffer = new UnsafeBuffer(ByteBuffer.allocateDirect(5 * COUNTER_LENGTH));
          final int counterId = 2;
  
          try (UnsafeBufferPosition position = new UnsafeBufferPosition(buffer, counterId, null))
          {
              position.setOpaque(10);
              assertEquals(10, position.getOpaque());
  
              assertFalse(position.proposeMaxOpaque(5));
              assertEquals(10, position.getOpaque());
              assertTrue(position.proposeMaxOpaque(100));
              assertEquals(100, position.getOpaque());
          }
      }
  }
  