@Test
 void findEachTest() {
   final HopscotchCollection<Integer> hopscotchCollection = new HopscotchCollection<>(testVals);
   for (final Integer value : testVals) {
     Assert.assertEquals(
         SVUtils.iteratorSize(hopscotchCollection.findEach(value)),
         testVals.stream().filter(i -> i.equals(value)).count());
   }
   Assert.assertEquals(SVUtils.iteratorSize(hopscotchCollection.findEach(notInTestVals)), 0);
 }
 @Test
 void clearTest() {
   final HopscotchCollection<Integer> hopscotchCollection = new HopscotchCollection<>(testVals);
   hopscotchCollection.clear();
   Assert.assertEquals(hopscotchCollection.size(), 0);
   Assert.assertEquals(SVUtils.iteratorSize(hopscotchCollection.iterator()), 0);
 }
 @Test
 void iteratorTest() {
   final HopscotchCollection<Integer> hopscotchCollection = new HopscotchCollection<>(testVals);
   Assert.assertEquals(SVUtils.iteratorSize(hopscotchCollection.iterator()), testVals.size());
   final Integer KEY_TO_REMOVE = 1;
   final Iterator<Integer> itr1 = hopscotchCollection.iterator();
   while (itr1.hasNext()) {
     if (itr1.next().equals(KEY_TO_REMOVE)) itr1.remove();
   }
   final int onesCount = (int) testVals.stream().filter(i -> i.equals(KEY_TO_REMOVE)).count();
   Assert.assertEquals(hopscotchCollection.size(), testVals.size() - onesCount);
   Assert.assertEquals(
       SVUtils.iteratorSize(hopscotchCollection.iterator()), hopscotchCollection.size());
   final Iterator<Integer> itr2 = hopscotchCollection.iterator();
   while (itr2.hasNext()) {
     itr2.next();
     itr2.remove();
   }
   Assert.assertTrue(hopscotchCollection.isEmpty());
   Assert.assertEquals(
       SVUtils.iteratorSize(hopscotchCollection.iterator()), hopscotchCollection.size());
 }