/**
    * 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.hadoop.hbase.client;
  
  import static org.apache.hadoop.hbase.client.TestBatchScanResultCache.createCells;
  import static org.junit.Assert.assertEquals;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.LinkedList;
  
  import org.apache.hadoop.hbase.Cell;
  import org.apache.hadoop.hbase.testclassification.ClientTests;
  import org.apache.hadoop.hbase.testclassification.SmallTests;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  @Category({ SmallTests.class, ClientTests.class })
  public class TestAllowPartialScanResultCache {
  
    private static byte[] CF = Bytes.toBytes("cf");
  
    private AllowPartialScanResultCache resultCache;
    private static final LinkedList<Result> cache = new LinkedList<Result>();
  
    @Before
    public void setUp() {
      resultCache = new AllowPartialScanResultCache(cache);
    }
  
    @After
    public void tearDown() {
      resultCache.clear();
      resultCache = null;
    }
  
    @Test
    public void test() throws IOException {
      resultCache.loadResultsToCache(ScanResultCache.EMPTY_RESULT_ARRAY, false);
      assertEquals(0, cache.size());
      resultCache.loadResultsToCache(ScanResultCache.EMPTY_RESULT_ARRAY, true);
      assertEquals(0, cache.size());
  
      Cell[] cells1 = createCells(CF, 1, 10);
      Cell[] cells2 = createCells(CF, 2, 10);
  
      resultCache.loadResultsToCache(
        new Result[] { Result.create(Arrays.copyOf(cells1, 5), null, false, true) }, false);
      Result[] results1 = cache.toArray(new Result[0]);
      assertEquals(1, results1.length);
      assertEquals(1, Bytes.toInt(results1[0].getRow()));
      assertEquals(5, results1[0].rawCells().length);
      for (int i = 0; i < 5; i++) {
        assertEquals(1, Bytes.toInt(results1[0].getValue(CF, Bytes.toBytes("cq" + i))));
      }
  
      cache.clear();
      resultCache.loadResultsToCache(
        new Result[] { Result.create(Arrays.copyOfRange(cells1, 1, 10), null, false, true) }, false);
      Result[] results2 = cache.toArray(new Result[0]);
      assertEquals(1, results2.length);
      assertEquals(1, Bytes.toInt(results2[0].getRow()));
      assertEquals(5, results2[0].rawCells().length);
      for (int i = 5; i < 10; i++) {
        assertEquals(1, Bytes.toInt(results2[0].getValue(CF, Bytes.toBytes("cq" + i))));
      }
  
      cache.clear();
      resultCache.loadResultsToCache(
        new Result[] { Result.create(cells1), Result.create(cells2) }, false);
      Result[] results3 = cache.toArray(new Result[0]);
      assertEquals(1, results3.length);
      assertEquals(2, Bytes.toInt(results3[0].getRow()));
      assertEquals(10, results3[0].rawCells().length);
      for (int i = 0; i < 10; i++) {
        assertEquals(2, Bytes.toInt(results3[0].getValue(CF, Bytes.toBytes("cq" + i))));
      }
    }
  }