@Test
public void testDeltaNoExpiry() {

    DeltaHandler deltaHandler = new DeltaHandler(redisClient, null);
    deltaHandler.handle(request, router);
    verify(redisClient, times(1)).set(eq("delta:resources:a:b:c"), eq("555"), any());
    verify(redisClient, never()).setex(any(), anyLong(), any(), any());
}