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.bookkeeper.bookie.storage.ldb;
  
  import static org.junit.Assert.assertArrayEquals;
  
  import org.junit.Test;
  
  /**
   * Unit test for {@link ArrayGroupSort}.
   */
  public class ArraySortGroupTest {
  
      @Test
      public void simple() {
          long[] data = new long[] { //
                  1, 2, 3, 4, //
                  5, 6, 3, 1, //
                  4, 8, 1, 2, //
                  4, 5, 12, 10, //
                  3, 3, 3, 3, //
                  4, 3, 1, 2, //
                  3, 3, 3, 3, //
          };
  
          long[] expectedSorted = new long[] { //
                  1, 2, 3, 4, //
                  3, 3, 3, 3, //
                  3, 3, 3, 3, //
                  4, 3, 1, 2, //
                  4, 5, 12, 10, //
                  4, 8, 1, 2, //
                  5, 6, 3, 1, //
          };
  
          ArrayGroupSort.sort(data);
  
          assertArrayEquals(expectedSorted, data);
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void arraySizeIsNotMultiple() {
          ArrayGroupSort.sort(new long[] { 1, 2, 3, 4, 5 });
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void arraySizeIsShorterThanRequired() {
          ArrayGroupSort.sort(new long[] { 1, 2 });
      }
  
      @Test
      public void emptyArray() {
          long[] data = new long[] {};
  
          long[] expectedSorted = new long[] {};
  
          ArrayGroupSort.sort(data);
  
          assertArrayEquals(expectedSorted, data);
      }
  
      @Test
      public void singleItem() {
          long[] data = new long[] { 1, 2, 3, 4 };
          long[] expectedSorted = new long[] { 1, 2, 3, 4 };
  
          ArrayGroupSort.sort(data);
  
          assertArrayEquals(expectedSorted, data);
      }
  
      @Test
      public void twoItems() {
          long[] data = new long[] { 1, 2, 3, 4, 1, 1, 5, 5 };
          long[] expectedSorted = new long[] { 1, 1, 5, 5, 1, 2, 3, 4 };
  
          ArrayGroupSort.sort(data);
  
          assertArrayEquals(expectedSorted, data);
      }
  
      @Test
      public void threeItems() {
          long[] data = new long[] { 1, 2, 3, 4, 1, 1, 5, 5, 1, 0, 2, 1 };
          long[] expectedSorted = new long[] { 1, 0, 2, 1, 1, 1, 5, 5, 1, 2, 3, 4 };
  
          ArrayGroupSort.sort(data);
  
          assertArrayEquals(expectedSorted, data);
      }
  
  }
  