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 java.util.ArrayList;
  import java.util.List;
  
  import org.junit.Test;
  
  import org.quicktheories.core.Gen;
  import org.quicktheories.generators.SourceDSL;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.quicktheories.QuickTheory.qt;
  
  public class VectorTypeTest
  {
      @Test
      public void composeAsFloat()
      {
          // dim
          // data
          Gen<Integer> dimGen = SourceDSL.integers().between(1, 100);
          Gen<Float> floatGen = SourceDSL.floats().any();
          Gen<Case> caseGen = rnd -> {
              int dim = dimGen.generate(rnd);
              float[] array = new float[dim];
              for (int i = 0; i < dim; i++)
                  array[i] = floatGen.generate(rnd);
              return new Case(dim, array);
          };
          qt().forAll(caseGen).checkAssert(c -> {
              VectorType<Float> type = VectorType.getInstance(FloatType.instance, c.dim);
              ByteBuffer bb = type.decompose(c.box());
              assertThat(type.composeAsFloat(bb)).isEqualTo(c.values);
              assertThat(c.unbox(type.compose(bb))).isEqualTo(c.values);
              assertThat(type.decomposeAsFloat(c.values)).isEqualTo(bb);
          });
      }
  
      private static class Case
      {
          final int dim;
          final float[] values;
  
          private Case(int dim, float[] values)
          {
              this.dim = dim;
              this.values = values;
          }
  
          List<Float> box()
          {
              List<Float> list = new ArrayList<>(dim);
              for (int i = 0; i < dim; i++)
                  list.add(values[i]);
              return list;
          }
  
          float[] unbox(List<Float> list)
          {
              assertThat(list).hasSize(dim);
              float[] array = new float[dim];
              for (int i = 0; i < dim; i++)
                  array[i] = list.get(i);
              return array;
          }
      }
  }