I am writing a compliance test suite for the Limited Application Protocol (CoAP) based on TTCN-3. Now I already know the protocol. CoAP is similar to HTTP. Both of them are application layer protocols. There is a CoAP client and CoAP server, they exchange messages. Now I'm starting to write a test suite. But I am having problems with how I can develop the whole set of tests, because there can be too many test cases. In order for me to develop a complete set of tests, before writing each test case, it is necessary to group test cases. How am I going to group these test cases? Can anyone give me some suggestions? Thank.
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