Above the communication protocols are the optionalfile attachment and security layers that are implemented with MIME.
通信协议的上面是可选的文件附件和安全层，用MIME实现。
2
AttachmentIBMTest.jsp - this is another optionalfile that contains several lines of code that invokes the test client we create.
jsp——这是另一个可选文件，其中包含调用我们创建的测试客户机的若干代码行。
3
Instead of having a test method per use case, we have a text file containing the expected generated code and a optional text file containing the expected compiler messages.