@Test
  public void testPairsMatching() {
    DoubleArrayList keyList = new DoubleArrayList();
    List<TestClass> valueList = new ArrayList<TestClass>();
    OpenDoubleObjectHashMap<TestClass> map = new OpenDoubleObjectHashMap<TestClass>();
    map.put((double) 11, anotherItem2);
    map.put((double) 12, anotherItem3);
    map.put((double) 13, anotherItem4);
    map.put((double) 14, anotherItem5);
    map.removeKey((double) 13);
    map.pairsMatching(
        new DoubleObjectProcedure<TestClass>() {

          @Override
          public boolean apply(double first, TestClass second) {
            return (first % 2) == 0;
          }
        },
        keyList,
        valueList);
    keyList.sort();
    Collections.sort(valueList);
    assertEquals(2, keyList.size());
    assertEquals(2, valueList.size());
    assertEquals(12, keyList.get(0), (double) 0.000001);
    assertEquals(14, keyList.get(1), (double) 0.000001);
    assertSame(anotherItem3, valueList.get(0));
    assertSame(anotherItem5, valueList.get(1));
  }
  @Test
  public void testPairsSortedByKey() {
    OpenShortDoubleHashMap map = new OpenShortDoubleHashMap();
    map.put((short) 11, (double) 100);
    map.put((short) 12, (double) 70);
    map.put((short) 13, (double) 30);
    map.put((short) 14, (double) 3);

    ShortArrayList keys = new ShortArrayList();
    DoubleArrayList values = new DoubleArrayList();
    map.pairsSortedByKey(keys, values);

    assertEquals(4, keys.size());
    assertEquals(4, values.size());
    assertEquals((short) 11, keys.get(0));
    assertEquals((double) 100, values.get(0), (double) 0.000001);
    assertEquals((short) 12, keys.get(1));
    assertEquals((double) 70, values.get(1), (double) 0.000001);
    assertEquals((short) 13, keys.get(2));
    assertEquals((double) 30, values.get(2), (double) 0.000001);
    assertEquals((short) 14, keys.get(3));
    assertEquals((double) 3, values.get(3), (double) 0.000001);
    keys.clear();
    values.clear();
    map.pairsSortedByValue(keys, values);
    assertEquals((short) 11, keys.get(3));
    assertEquals((double) 100, values.get(3), (double) 0.000001);
    assertEquals((short) 12, keys.get(2));
    assertEquals((double) 70, values.get(2), (double) 0.000001);
    assertEquals((short) 13, keys.get(1));
    assertEquals((double) 30, values.get(1), (double) 0.000001);
    assertEquals((short) 14, keys.get(0));
    assertEquals((double) 3, values.get(0), (double) 0.000001);
  }
  @Test
  public void testPairsMatching() {
    ShortArrayList keyList = new ShortArrayList();
    DoubleArrayList valueList = new DoubleArrayList();
    OpenShortDoubleHashMap map = new OpenShortDoubleHashMap();
    map.put((short) 11, (double) 22);
    map.put((short) 12, (double) 23);
    map.put((short) 13, (double) 24);
    map.put((short) 14, (double) 25);
    map.removeKey((short) 13);
    map.pairsMatching(
        new ShortDoubleProcedure() {

          @Override
          public boolean apply(short first, double second) {
            return (first % 2) == 0;
          }
        },
        keyList,
        valueList);
    keyList.sort();
    valueList.sort();
    assertEquals(2, keyList.size());
    assertEquals(2, valueList.size());
    assertEquals(12, keyList.get(0));
    assertEquals(14, keyList.get(1));
    assertEquals(23, valueList.get(0), (double) 0.000001);
    assertEquals(25, valueList.get(1), (double) 0.000001);
  }
 @Test
 public void testKeysSortedByValue() {
   OpenDoubleObjectHashMap<TestClass> map = new OpenDoubleObjectHashMap<TestClass>();
   map.put((double) 11, anotherItem5);
   map.put((double) 12, anotherItem4);
   map.put((double) 13, anotherItem3);
   map.put((double) 14, anotherItem2);
   map.removeKey((double) 13);
   DoubleArrayList keys = new DoubleArrayList();
   map.keysSortedByValue(keys);
   double[] keysArray = keys.toArray(new double[keys.size()]);
   assertArrayEquals(new double[] {14, 12, 11}, keysArray, (double) 0.000001);
 }
 @Test
 public void testValues() {
   OpenShortDoubleHashMap map = new OpenShortDoubleHashMap();
   map.put((short) 11, (double) 22);
   map.put((short) 12, (double) 23);
   map.put((short) 13, (double) 24);
   map.put((short) 14, (double) 25);
   map.removeKey((short) 13);
   DoubleArrayList values = new DoubleArrayList(100);
   map.values(values);
   assertEquals(3, values.size());
   values.sort();
   assertEquals(22, values.get(0), (double) 0.000001);
   assertEquals(23, values.get(1), (double) 0.000001);
   assertEquals(25, values.get(2), (double) 0.000001);
 }
  /**
   * Returns a string representation of the receiver, containing the String representation of each
   * key-value pair, sorted ascending by key.
   */
  public String toString() {
    DoubleArrayList theKeys = keys();
    // theKeys.sort();

    StringBuilder buf = new StringBuilder();
    buf.append('[');
    int maxIndex = theKeys.size() - 1;
    for (int i = 0; i <= maxIndex; i++) {
      double key = theKeys.get(i);
      buf.append(String.valueOf(key));
      if (i < maxIndex) {
        buf.append(", ");
      }
    }
    buf.append(']');
    return buf.toString();
  }
  @Test
  public void testPairsSortedByKey() {
    OpenDoubleObjectHashMap<TestClass> map = new OpenDoubleObjectHashMap<TestClass>();
    map.put((double) 11, anotherItem5);
    map.put((double) 12, anotherItem4);
    map.put((double) 13, anotherItem3);
    map.put((double) 14, anotherItem2);

    DoubleArrayList keys = new DoubleArrayList();
    List<TestClass> values = new ArrayList<TestClass>();
    map.pairsSortedByKey(keys, values);

    assertEquals(4, keys.size());
    assertEquals(4, values.size());
    assertEquals((double) 11, keys.get(0), (double) 0.000001);
    assertSame(anotherItem5, values.get(0));
    assertEquals((double) 12, keys.get(1), (double) 0.000001);
    assertSame(anotherItem4, values.get(1));
    assertEquals((double) 13, keys.get(2), (double) 0.000001);
    assertSame(anotherItem3, values.get(2));
    assertEquals((double) 14, keys.get(3), (double) 0.000001);
    assertSame(anotherItem2, values.get(3));
  }
  @Test
  public void testForEachKey() {
    final DoubleArrayList keys = new DoubleArrayList();
    OpenDoubleObjectHashMap<TestClass> map = new OpenDoubleObjectHashMap<TestClass>();
    map.put((double) 11, anotherItem);
    map.put((double) 12, anotherItem2);
    map.put((double) 13, anotherItem3);
    map.put((double) 14, anotherItem4);
    map.removeKey((double) 13);
    map.forEachKey(
        new DoubleProcedure() {

          @Override
          public boolean apply(double element) {
            keys.add(element);
            return true;
          }
        });

    double[] keysArray = keys.toArray(new double[keys.size()]);
    Arrays.sort(keysArray);

    assertArrayEquals(new double[] {11, 12, 14}, keysArray, (double) 0.000001);
  }