09-coap: add CoAP release specs

[kb2ma]

Contribution description

Basic coverage for CoAP messaging as described in #73. The goal for this PR is to include non-confirmable and confirmable messaging, block extension, and observe extension. Includes some tests for both gcoap and nanocoap. Includes test of RIOT Resource Directory client implementation (CORD).

Initial commit probably premature, but I wanted to get the message out that I'm working on it for the 2018.10 release. :-)

Issues/PRs references

Resolves #73

[kb2ma]

Making good progress; one more task to go. I did just find a bug in nanocoap that probably should be fixed for the release, so I'll create a PR for that before continuing with the test spec.

[cladmi]

Good to have dedicated tests using coap for the release.

A remark that shows a flaw in my previous naming, maybe my task 09 should be named 99 as I wanted it to be an optional bonus task. This way your task would be a more important task directly after the others. I can rename it.

[jia200x]

thanks @kb2ma !!

[kb2ma]

Sure thing @jia200x, glad to get this in. It gave me an excuse to work with aiocoap, which is worthwhile.

@cladmi, I'll follow your lead on the naming for the directory. If 09-compile... goes away, I'll rename 10-coap to take its place.

[cladmi]

It went away :)

[kb2ma]

Added Observe task, renamed to 09-coap. Squashed and ready for review. The content should be usable by others.

Also, from my perspective gcoap and nanocoap work fine in 2018.10-branch with the fix in RIOT #10298.

[aabadie]

These specifications are providing good tests of the basic CoAP features available in RIOT. I tried all of them with success by following the description given. Maybe adding a note on how to setup the tap (like it's done gnrc_networking example) could also help.

I found minor typos in the documentation and I also think the lines could be split to 80 characters width.

It would be great to have these CoAP release specs also tested for the next release (2019.01).

[aabadie]

s/requst/request/ + 2 spaces between runner and delays

[aabadie]

s/on the payload/of the payload/ ?

[kb2ma]

Thanks for the review. I added a couple of fixups to address your concerns. Rather than fully explain the tap setup, I included scripts to set up and teardown, and referenced them in the instructions. Let me know if that is good enough.

Also FWIW, RIOT #10671 added a feature to tests/nanocoap_cli to specify a number of requests to ignore. This will make test #02 cleaner to run. I'll provide an update after we merge the present PR.

[kb2ma]

Pushed the wrong button. :-)

[kb2ma]

And of course I'm happy to run these tests for the release.

[aabadie]

Thanks for updating and adding the setup script @kb2ma. This will be useful.

Please squash!

ACK

[kb2ma]

Squashed, looks good to me.

[aabadie]

Thanks, let's merge!