### Question:
MessageTemplate extends AbstractYammerOperations implements MessageOperations { public void like(long messageId) { restTemplate.postForObject(buildUri("messages/liked_by/current.json", "message_id", String.valueOf(messageId)),null, String.class); } MessageTemplate(RestTemplate restTemplate); MessageInfo getMessages(long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesFollowing(long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesSent(long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesPrivate(long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesAboutTopic(long topicId, long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesInGroup(long groupId, long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesInThread(long threadId, long olderThan, long newerThan, int limit); MessageInfo getMessagesFromUser(long userId, long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesLikedByUser(long userId, long olderThan, long newerThan, String threaded, int limit); MessageInfo getMessagesReceived(long olderThan, long newerThan, String threaded, int limit); MessageInfo postUpdate(String message); MessageInfo postUpdate(String message, YammerPostDetails details); void like(long messageId); void unlike(long messageId); void delete(long messageId);  }### Answer:
@Test public void testLikeMessage() { mockServer.expect(requestTo("https: .andExpect(method(POST)) .andRespond(withSuccess("", MediaType.TEXT_PLAIN)); yammerTemplate.messageOperations().like(123L); }