### Question:
ChatMessage { public int getMessageId() { return messageId; } ChatMessage(int groupId,
                       String content,
                       int userId,
                       String username,
                       Date timeSent); int getMessageId(); void setMessageId(int messageId); int getGroupId(); void setGroupId(int groupId); String getContent(); void setContent(String content); int getUserId(); void setUserId(int userId); String getUsername(); void setUsername(String username); Date getTimeSent(); void setTimeSent(Date timeSent); boolean equalContent(ChatMessage o); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test public void getMessageId() throws Exception { assertEquals(0, message1.getMessageId()); }