Re: [netmod] WGLC - draft-ietf-netmod-yang-tree-diagrams

[Juergen Schoenwaelder <[e-mail]>]

On Tue, Jan 16, 2018 at 08:19:38PM +0100, Vladimir Vassilev wrote:
> 
> As for the automated validation of the tree diagrams as an added value to
> the human readability I have the following thoughts. I would like to be able
> to compare unlimited line length tree outputs generated by different YANG
> compilers for equality. This is mainly a way to have some partial common
> denominator output for validating YANG is correctly compiled which we did
> not have until now. For example as soon as I have support for Schema mount I
> would compare the tree output with another tool known to work and add some
> testcases based on that. I do not see any automated alternative for doing
> this except writing NETCONF chat scripts (also module specific), or writing
> not only YANG module specific but also API specific test cases as 3rd
> option. 1) does not compromise this automated validation option since space
> sequences can be collapsed to single space. If the alignment algorithm was
> creating a possibility for nontrivial output variation then I would have
> supported strongly 3) but this is not the current case.
>

If you want to make sure a YANG compiler is correct, simply write a
backend that generates a serialized YANG module in canonical
form. They YANG modules should be the same. Determining YANG compiler
correctness by comparing tree diagrams does not seem to be a
convincing approach since tree diagrams by design leave many details
out.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
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