CookieCollection implements Collection<Cookie> { @Override public boolean add(Cookie cookie) { if(cookie==null) { return false; } cookieMap.put(cookie.getName(), cookie); return true; } CookieCollection();  CookieCollection(Cookie... cookies);  CookieCollection(Collection<? extends Cookie> cookies); @Override int size(); @Override boolean isEmpty(); @Override boolean contains(Object o); @Override Iterator<Cookie> iterator(); Cookie [] toArray(); @Override T[] toArray(T[] ts); @Override boolean add(Cookie cookie); @Override boolean remove(Object o); Cookie get(String name); @Override boolean containsAll(Collection<?> collection); @Override boolean addAll(Collection<? extends Cookie> collection); @Override boolean removeAll(Collection<?> collection); @Override boolean retainAll(Collection<?> collection); @Override void clear();  }
@Test public void add() throws Exception { CookieCollection cookies = new CookieCollection(cookie); Cookie newCookie = new Cookie(BROWNIE_NAME, "mmh"); cookies.add(newCookie); Assert.assertEquals(2, cookies.size()); Assert.assertTrue(cookies.contains(newCookie)); Assert.assertTrue(cookies.contains(BROWNIE_NAME)); }