Code example for Collection

	} 
 
	// 4. double check hasNext() true -> next() will return the last object for each 
	// iterator 
	public void testMultiIteratorHasNextConsistency() throws Exception { 
		assertTrue(dynamicCollection.isEmpty());
		assertFalse(iter.hasNext());
 
		Iterator iter1 = dynamicCollection.iterator();
 
		Object a = new Object();
		Object b = new Object();
		Object c = new Object();
		dynamicCollection.add(a);
		dynamicCollection.add(b);
 
		Iterator iter2 = dynamicCollection.iterator();
 
		dynamicCollection.add(c);
 
		Iterator iter3 = dynamicCollection.iterator();
 
		// iter2 goes in the middle 
		assertSame(a, iter2.next());
		// iter3 approaches the end 
		assertSame(a, iter3.next());
		assertSame(b, iter3.next());
 
		// check hasNext() and force next() 
		assertTrue(iter3.hasNext());
		assertTrue(iter1.hasNext());
		assertTrue(iter2.hasNext());
 
		dynamicCollection.remove(c);
		dynamicCollection.remove(b);
		dynamicCollection.remove(a);
 
		assertSame(a, iter1.next());
		assertSame(b, iter2.next());
		assertSame(c, iter3.next());
	}