linux-kernel - Re: [KTAP V2 PATCH] ktap_v2: add recognized test name line

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Date:   Mon, 20 Mar 2023 12:21:09 -0700
From:   Daniel Latypov <dlatypov@...gle.com>
To:     Rae Moar <rmoar@...gle.com>
Cc:     frowand.list@...il.com, davidgow@...gle.com,
        skhan@...uxfoundation.org, keescook@...omium.org,
        Tim.Bird@...y.com, brendanhiggins@...gle.com, corbet@....net,
        guillaume.tucker@...labora.com, kernelci@...ts.linux.dev,
        kunit-dev@...glegroups.com, linux-kselftest@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [KTAP V2 PATCH] ktap_v2: add recognized test name line

On Thu, Mar 16, 2023 at 3:59 PM Rae Moar <rmoar@...gle.com> wrote:
>
> Add recognition of the test name line ("# Subtest: <name>") to the KTAP v2
> spec.
>
> The purpose of this line is to declare the name of a test before its
> results. This functionality is especially useful when trying to parse test
> results incrementally and when interpretting results after a crash.
>
> This line is already compliant with KTAP v1 as it is interpretted as a

minor nit for if there's a v2, s/interprett/interpret (here and above)

Also, I want to elaborate on the previous paragraph a bit more, in
case the motivation isn't clear.
The problem with TAP and KTAP as-is is that the name of a test case is
only known *after* it completes.

So the scenario being referred to is

KTAP version 1
1..1
<lots of output>
<kernel crash, no more output>

It would be nice if parsers could report "test FOO caused a crash" as
opposed to "the first test case caused a crash, good luck figuring out
which one that was"

Daniel