### Question:
SubscriptionTemplate extends AbstractYammerOperations implements SubscriptionOperations { public void unfollowTopic(long topicId) { unfollow("tag", topicId); } SubscriptionTemplate(RestTemplate restTemplate); void followUser(long userId); void followTopic(long topicId); void unfollowUser(long userId); void unfollowTopic(long topicId); boolean isFollowingUser(long userId); boolean isFollowingTopic(long topicId); boolean isFollowingThread(long threadId);  }### Answer:
@Test public void testUnfollowTopic(){ mockServer.expect(requestTo("https: .andExpect(method(DELETE)) .andRespond(withSuccess("", APPLICATION_JSON)); yammerTemplate.subscriptionOperations().unfollowTopic(123L); }