@Test
public void testMapperDate_notParsableDatePattern() {

  LOG.info("testMapperDate_notParsableDatePattern()");
  Map<String, Object> mapConfigs = new HashMap<>();
  mapConfigs.put("target_date_pattern", "not_parsable_content");
  MapperDate mapperDate = new MapperDate();
  assertFalse("Was able to initialize!", mapperDate.init(null, "someField", null, mapConfigs));
}