[Buildroot] [PATCH 1/3] testing/infra/emulator: allow to specify pexpect timeout

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

First of all, thanks a lot for working on the testing infrastructure.
It's nice to see people progressively making use of it!

I however have one comment below.

On Tue,  4 Jul 2017 11:58:05 -0700, Andrey Smirnov wrote:
> Some commands take more than 5 seconds to complete under QEMU, so add
> provisions to allow individual unit-test to specify different duration
> to avoid false negative test failures.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> ---
>  support/testing/infra/emulator.py | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/support/testing/infra/emulator.py b/support/testing/infra/emulator.py
> index a39d59b..4e988a4 100644
> --- a/support/testing/infra/emulator.py
> +++ b/support/testing/infra/emulator.py
> @@ -26,7 +26,10 @@ class Emulator(object):
>      #
>      # options: array of command line options to pass to Qemu
>      #
> -    def boot(self, arch, kernel=None, kernel_cmdline=None, options=None):
> +    # timeout: timeout to wait for when excuting commands
> +    #
> +    def boot(self, arch, kernel=None, kernel_cmdline=None,
> +             options=None, timeout=5):

I don't really like the fact that the timeout is passed at boot() and
then applies to the entire pexpect session.

Indeed, within a single pexpect session, we may have some commands that
are expected to be short, some commands that are expected to be long.

The .expect() method of the spawn class does have a timeout argument,
so I believe we could do that per-command.

Do you think it would be possible to instead add the timeout to
emulator.run() instead, and use it only when starting the interpreter ?

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com