@Test
public void testNullDeserializedEvent() {

  InternalEvent ievent = new InternalEvent("", null, 0);
  ievent.setEventObj(null);
  String path = "$.simple_object.key";
  Pattern pattern = Pattern.compile("(val)");
  Boolean match = false;
  RegexFilterOperation op = new RegexFilterOperation(pattern, path, match);
  boolean filter = op.test(ievent);
  assertFalse(filter);
}