@Test
public void testDecodeTwoThingsEmpty() throws FieldNotFoundException {

  DummpyMapEvent devent = new DummpyMapEvent();
  devent.setField("foo", "%3Ffoo%3Dbar%26baz%3Dqux");
  URLDecodeOperation op = new URLDecodeOperation(Arrays.asList("foo", "bar"), 1);
  InternalEvent ievent = new InternalEvent("", null, 0);
  ievent.setEventObj(devent);
  op.perform(ievent);
  assertEquals(1, devent.payload.size());
  assertEquals("?foo=bar&baz=qux", devent.getFieldAsString("foo"));
}