assertTrue(! iter.hasPrevious());
while( expected.hasNext() ) {
assertTrue(iter.hasNext());
assertEquals(expected.nextIndex(),iter.nextIndex());
assertEquals(expected.previousIndex(),iter.previousIndex());
assertEquals(expected.next(),iter.next());
assertTrue(iter.hasPrevious());
assertEquals(expected.nextIndex(),iter.nextIndex());
assertEquals(expected.previousIndex(),iter.previousIndex());