### Question:
Message implements Serializable { public boolean hasAttachment() { return attachment != null; } Message();  Message(Integer id, String recipients, String sender, String subject, String content);  Message(Integer id, String recipients, String sender, String subject, String content, String contentType);  Message(Integer id, String recipients, String sender, String subject, String content, String attachment,
	    String attachmentContentType, String attachmentFileName);  Message(Integer id, String recipients, String sender, String subject, String content, String contentType,
	    String attachment, String attachmentContentType, String attachmentFileName); void setId(Integer id); Integer getId(); void setRecipients(String recipients); String getRecipients(); void addRecipient(String recipient); void setSender(String sender); String getSender(); void setSubject(String subject); String getSubject(); void setSentDate(Date sentDate); Date getSentDate(); void setContent(String content); String getContent(); void setContentType(String contentType); String getContentType(); String getAttachment(); void setAttachment(String attachment); String getAttachmentContentType(); void setAttachmentContentType(String attachmentContentType); String getAttachmentFileName(); void setAttachmentFileName(String attachmentFileName); boolean hasAttachment();  }### Answer:
@Test public void hasAttachment_shouldRReturnTrueIfThisMessageHasAnAttachment() { Message testMessage1 = createTestMessage1(); Message testMessage2 = createTestMessage2(); assertTrue(testMessage1.hasAttachment()); assertFalse(testMessage2.hasAttachment()); }
@Test @Verifies(value = "should r return true if this message has an attachment", method = "hasAttachment()") public void hasAttachment_shouldRReturnTrueIfThisMessageHasAnAttachment() throws Exception { Message testMessage1 = createTestMessage1(); Message testMessage2 = createTestMessage2(); assertTrue(testMessage1.hasAttachment()); assertFalse(testMessage2.hasAttachment()); }