Re: [PATCH v4 06/12] tests/qtest/qos-test: dump environment variables if verbose

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

On Samstag, 24. Oktober 2020 07:56:10 CEST Thomas Huth wrote:
> On 08/10/2020 20.34, Christian Schoenebeck wrote:
> > If qtests are run in verbose mode (i.e. if --verbose CL argument
> > was provided) then print all environment variables to stdout
> > before running the individual tests.
> 
> Why? ... you should provide some rationale in the patch description here, at
> least to me this is not obvious why it is needed / desired.
> 
>  Thomas

In my particular case I wanted to know whether there is already some config 
vector for 'please use this test directory for file tests'. As I didn't find 
one in any API, I also looked for environment variables to be sure. Especially 
as there are a bunch of qtest related environment variables already.

In general though it is common nowadays, at least being able to output all 
config vectors in a build chain, especially if it is required to investigate 
build- and test-issues on foreign/remote machines, which includes environment 
variables.

Staying in the context of writing test cases: there are a bunch of other use 
cases that would come to my mind from the PoV of a test case author:
"Is there an option for short vs. long tests?", "Is there a desired size 
limitation for large file tests?", "Is there a deadline for the runtime of 
tests?", ...

Best regards,
Christian Schoenebeck