@Test
public void testExtractEntities_doubleOccurrence() {

    String mentionName = "jane";
    String userId = "1";
    String roomId = "100";
    String ent = "Mount Everest";
    Message msg = new Message(DateTime.now(), mentionName, userId,
                              String.format("Today, I'm going to climb %s and %s", ent, ent),
                              roomId, MessageType.MESSAGE);
    FatMessage fatMessage = new FatMessage(msg, user, room);
    List<ChatEntity> entities = underTest.extractEntities(fatMessage);
    assertEquals(1, entities.size());
    assertEquals(2, entities.get(0).getOccurrences());
}