@Test
 public void testGet() {
   OpenDoubleObjectHashMap<TestClass> map = new OpenDoubleObjectHashMap<TestClass>();
   map.put((double) 11, item);
   map.put((double) 12, anotherItem);
   assertSame(item, map.get((double) 11));
   assertSame(null, map.get((double) 0));
 }
 @Test
 public void testClear() {
   OpenDoubleObjectHashMap<TestClass> map = new OpenDoubleObjectHashMap<TestClass>();
   map.put((double) 11, item);
   assertEquals(1, map.size());
   map.clear();
   assertEquals(0, map.size());
   assertSame(null, map.get((double) 11));
 }