assertThat(memoryDatabase.getPost("post2").get(),
isPost(secondPost.getId(), 2000L, "post2", of(RECIPIENT_ID)));
assertThat(memoryDatabase.getPost("post3").isPresent(), is(false));
assertThat(memoryDatabase.getPost("post2").get(),
isPost(secondPost.getId(), 2000L, "post2", of(RECIPIENT_ID)));
assertThat(memoryDatabase.getPost("post3").isPresent(), is(false));