@Test
@InRequestScope // スコープをあわせる
public void testChat() throws Exception{

    setUp();
    target.getChatRoom().setContent("chat");
    
    target.chat();
    
    assertThat(target.getChatRoom().getChats().size(), is(1));
    assertThat(target.getChatRoom().getChats().get(0).getContent(), is("chat"));
    assertThat(target.getChatRoom().getLastPost(), notNullValue());
  
}