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.quicktheories.core.Gen;
  import org.quicktheories.generators.Generate;
  
  import static org.apache.cassandra.db.marshal.ValueAccessors.ACCESSORS;
  import static org.quicktheories.generators.SourceDSL.arbitrary;
  import static org.quicktheories.generators.SourceDSL.integers;
  
  /**
   * Base class for testing {@code ValueAccessor} classes.
   */
  public class ValueAccessorTester
  {
      /**
       * This method should be used to test values to be processed by {@link ValueAccessor}
       * in order to make sure we do not assume position == 0 in the underlying {@link ByteBuffer}
       */
      public static <V> V leftPad(V value, int padding)
      {
          if (!(value instanceof ByteBuffer))
              return value;
  
          ByteBuffer original = (ByteBuffer) value;
          ByteBuffer buf = ByteBuffer.allocate(original.remaining() + padding);
          buf.position(padding);
          buf.put(original);
          buf.position(padding);
          return (V) buf;
      }
  
      public static Gen<Integer> bbPadding()
      {
          return integers().between(0, 2);
      }
  
      public static Gen<ValueAccessor> accessors()
      {
          return arbitrary().pick(ACCESSORS)
                            .describedAs(a -> a.getClass().getSimpleName());
      }
  
      public static Gen<byte[]> byteArrays()
      {
          return byteArrays(Generate.constant(2));
      }
  
      public static Gen<byte[]> byteArrays(Gen<Integer> sizes)
      {
          return Generate.byteArrays(sizes, Generate.bytes(Byte.MIN_VALUE, Byte.MAX_VALUE, (byte) 0));
      }
  }
  