    @Test
    public void testDelete() {

        System.out.println("delete");
        EhcacheSessionDataStorage instance = new EhcacheSessionDataStorage();
        SessionData sessionData = instance.create();
        String sessionId = sessionData.getId();
        sessionData.put(KEY, VALUE);
        instance.save(sessionData);
        instance.delete(sessionId);
        SessionData deleted = instance.get(sessionId);
        assertNull(deleted);
    }