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.arrow.vector.util;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.memory.RootAllocator;
  import org.apache.arrow.vector.IntVector;
  import org.apache.arrow.vector.testing.ValueVectorDataPopulator;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /** Test cases for {@link VectorBatchAppender}. */
  public class TestVectorBatchAppender {
  
    private BufferAllocator allocator;
  
    @BeforeEach
    public void prepare() {
      allocator = new RootAllocator(1024 * 1024);
    }
  
    @AfterEach
    public void shutdown() {
      allocator.close();
    }
  
    @Test
    public void testBatchAppendIntVector() {
      final int length1 = 10;
      final int length2 = 5;
      final int length3 = 7;
      try (IntVector target = new IntVector("", allocator);
          IntVector delta1 = new IntVector("", allocator);
          IntVector delta2 = new IntVector("", allocator)) {
  
        target.allocateNew(length1);
        delta1.allocateNew(length2);
        delta2.allocateNew(length3);
  
        ValueVectorDataPopulator.setVector(target, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
        ValueVectorDataPopulator.setVector(delta1, 10, 11, 12, 13, 14);
        ValueVectorDataPopulator.setVector(delta2, 15, 16, 17, 18, 19, 20, 21);
  
        VectorBatchAppender.batchAppend(target, delta1, delta2);
  
        assertEquals(length1 + length2 + length3, target.getValueCount());
        for (int i = 0; i < target.getValueCount(); i++) {
          assertEquals(i, target.get(i));
        }
      }
    }
  }
  