Re: [Qemu-devel] [PATCH 05/18] Acceptance tests: introduce arch parameter and attribute

[Wainer dos Santos Moschetta <wainersm@redhat.com>]

Hi Cleber,

On 01/17/2019 04:56 PM, Cleber Rosa wrote:
> It's useful to define the architecture that should be used in
> situations such as:
>   * the intended target of the QEMU binary to be used on tests
>   * the architecture of code to be run within the QEMU binary, such
>     as a kernel image or a full blown guest OS image
>
> This commit introduces both a test parameter and a test instance
> attribute, that will contain such a value.
>
> Now, when the "arch" test parameter is given, it will influence the
> selection of the default QEMU binary, if one is not given explicitly
> by means of the "qemu_img" parameter.
>
> Signed-off-by: Cleber Rosa <crosa@redhat.com>
> ---
>   docs/devel/testing.rst                    | 18 ++++++++++++++++++
>   tests/acceptance/avocado_qemu/__init__.py | 13 ++++++++++---
>   2 files changed, 28 insertions(+), 3 deletions(-)
>
> diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
> index 44c9b3ae74..60a16c5834 100644
> --- a/docs/devel/testing.rst
> +++ b/docs/devel/testing.rst
> @@ -689,6 +689,17 @@ vm
>   A QEMUMachine instance, initially configured according to the given
>   ``qemu_bin`` parameter.
>   
> +arch
> +~~~~
> +
> +The architecture that will be used on a number of different
> +scenarios.  For instance, when a QEMU binary is not explicitly given,
> +the one selected will depend on this attribute.
> +
> +The ``arch`` attribute will be set to the test parameter of the same
> +name, and if one is not given explicitly, it will default to the
> +system architecture (as given by ``uname``).

Unless I'm missing something, the arch attribute will be None if I don't 
pass the arch parameter nor set the arch tag.

------
[root@xxx qemu]# cat tests/acceptance/arch.py
from avocado_qemu import Test

class Arch(Test):
     """
     :avocado: enable
     """
     def test(self):
         self.assertEqual(self.arch, "x86_64")
[root@xxx qemu]# ./tests/venv/bin/avocado run tests/acceptance/arch.py
JOB ID     : 032aabb8ec2364944d0e29df3b61931b42f4587c
JOB LOG    : /root/avocado/job-results/job-2019-01-31T08.42-032aabb/job.log
  (1/1) tests/acceptance/arch.py:Arch.test: FAIL: None != 'x86_64' (0.03 s)
RESULTS    : PASS 0 | ERROR 0 | FAIL 1 | SKIP 0 | WARN 0 | INTERRUPT 0 | 
CANCEL 0
JOB TIME   : 0.20 s
[root@xxx qemu]# ./tests/venv/bin/avocado run -p arch=x86_64 
tests/acceptance/arch.py
JOB ID     : 1913a73510cab4b6b118bd7e94e2746011368628
JOB LOG    : /root/avocado/job-results/job-2019-01-31T08.42-1913a73/job.log
  (1/1) tests/acceptance/arch.py:Arch.test: PASS (0.01 s)
RESULTS    : PASS 1 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | 
CANCEL 0
JOB TIME   : 0.19 s
[root@xxx qemu]# cat tests/acceptance/arch_tag.py
from avocado_qemu import Test

class Arch(Test):
     """
     :avocado: enable
     :avocado: tags=arch:x86_64
     """
     def test(self):
         self.assertEqual(self.arch, "x86_64")
[root@xxx qemu]# ./tests/venv/bin/avocado run tests/acceptance/arch_tag.py
JOB ID     : bc85be065586b8e9cf371489e1801489910e41b0
JOB LOG    : /root/avocado/job-results/job-2019-01-31T08.43-bc85be0/job.log
  (1/1) tests/acceptance/arch_tag.py:Arch.test: PASS (0.01 s)
RESULTS    : PASS 1 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | 
CANCEL 0
JOB TIME   : 0.19 s
------

- Wainer

> +
>   qemu_bin
>   ~~~~~~~~
>   
> @@ -711,6 +722,13 @@ like the following:
>   
>     PARAMS (key=qemu_bin, path=*, default=x86_64-softmmu/qemu-system-x86_64) => 'x86_64-softmmu/qemu-system-x86_64
>   
> +arch
> +~~~~
> +
> +The architecture that will be used on a number of different scenarios.
> +This parameter has a direct relation with the ``arch`` attribute.  If
> +not given, it will default to None.
> +
>   qemu_bin
>   ~~~~~~~~
>   
> diff --git a/tests/acceptance/avocado_qemu/__init__.py b/tests/acceptance/avocado_qemu/__init__.py
> index d8d5b48dac..7a38851753 100644
> --- a/tests/acceptance/avocado_qemu/__init__.py
> +++ b/tests/acceptance/avocado_qemu/__init__.py
> @@ -23,16 +23,22 @@ def is_readable_executable_file(path):
>       return os.path.isfile(path) and os.access(path, os.R_OK | os.X_OK)
>   
>   
> -def pick_default_qemu_bin():
> +def pick_default_qemu_bin(arch=None):
>       """
>       Picks the path of a QEMU binary, starting either in the current working
>       directory or in the source tree root directory.
>   
> +    :param arch: the arch to use when looking for a QEMU binary (the target
> +                 will match the arch given).  If None (the default) arch
> +                 will be the current host system arch (as given by
> +                 :func:`os.uname`).
> +    :type arch: str
>       :returns: the path to the default QEMU binary or None if one could not
>                 be found
>       :rtype: str or None
>       """
> -    arch = os.uname()[4]
> +    if arch is None:
> +        arch = os.uname()[4]
>       qemu_bin_relative_path = os.path.join("%s-softmmu" % arch,
>                                             "qemu-system-%s" % arch)
>       if is_readable_executable_file(qemu_bin_relative_path):
> @@ -47,8 +53,9 @@ def pick_default_qemu_bin():
>   class Test(avocado.Test):
>       def setUp(self):
>           self.vm = None
> +        self.arch = self.params.get('arch')
>           self.qemu_bin = self.params.get('qemu_bin',
> -                                        default=pick_default_qemu_bin())
> +                                        default=pick_default_qemu_bin(self.arch))
>           if self.qemu_bin is None:
>               self.cancel("No QEMU binary defined or found in the source tree")
>           self.vm = QEMUMachine(self.qemu_bin)