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.cassandra.db.marshal;
  
  import java.nio.ByteBuffer;
  
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  import static org.quicktheories.QuickTheory.qt;
  
  public class ByteBufferAccessorTest extends ValueAccessorTester
  {
  
      private static final TestNativeDataAllocator allocator = new TestNativeDataAllocator();
      @BeforeClass
      public static void setSetMemoryAllocator()
      {
          NativeAccessor.setNativeMemoryAllocator(allocator);
      }
  
      @AfterClass
      public static void releaseMemory()
      {
          allocator.close();
      }
  
  
      private static byte[] array(int start, int size)
      {
          byte[] a = new byte[size];
          for (int i = 0; i < size; i++)
              a[i] = (byte) (start + i);
          return a;
      }
  
      private <V> void testCopyFromOffsets(ValueAccessor<V> dstAccessor, int padding1, int padding2)
      {
          ByteBuffer src = leftPad(ByteBuffer.wrap(array(0, 10)), padding1);
          src.position(src.position() + 5);
          Assert.assertEquals(5, src.remaining());
  
          V dst = leftPad(dstAccessor.allocate(5), padding2);
          ByteBufferAccessor.instance.copyTo(src, 0, dst, dstAccessor, 0, 5);
          Assert.assertArrayEquals(array(5, 5), dstAccessor.toArray(dst));
      }
  
      /**
       * Test byte buffers with position > 0 are copied correctly
       */
      @Test
      public void testCopyFromOffets()
      {
          qt().forAll(accessors(), bbPadding(), bbPadding())
              .checkAssert(this::testCopyFromOffsets);
      }
  
      private <V> void testCopyToOffsets(ValueAccessor<V> srcAccessor, int padding1, int padding2)
      {
          byte[] value = array(5, 5);
          V src = leftPad(srcAccessor.allocate(5), padding1);
          ByteArrayAccessor.instance.copyTo(value, 0, src, srcAccessor, 0, value.length);
  
          ByteBuffer bb = leftPad(ByteBuffer.wrap(new byte[10]), padding2);
          ByteBuffer actual = bb.duplicate();
          bb.position(bb.position() + 5);
          srcAccessor.copyTo(src, 0, bb, ByteBufferAccessor.instance, 0, value.length);
  
          byte[] expected = new byte[10];
          System.arraycopy(value, 0, expected, 5, 5);
          Assert.assertArrayEquals(srcAccessor.getClass().getSimpleName(), expected, ByteBufferUtil.getArray(actual));
      }
  
      @Test
      public void testCopyToOffsets()
      {
          qt().forAll(accessors(), bbPadding(), bbPadding())
              .checkAssert(this::testCopyToOffsets);
      }
  }
  