tag.setPageContext(pageContext);
tag.setSource("myArray");
tag.doStartTag();
Iterator subsetIterator = (Iterator) stack.findValue("top");
tag.doEndTag();
assertEquals(subsetIterator.next(), new Integer(1));
assertEquals(subsetIterator.next(), new Integer(2));
assertEquals(subsetIterator.next(), new Integer(3));
assertEquals(subsetIterator.next(), new Integer(4));