Re: [Qemu-devel] [RFC PATCH v2 1/6] avocado: Add a Test.arch property

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

Hi Cleber,

On 06/28/2018 07:03 PM, Philippe Mathieu-Daudé wrote:
> On 06/28/2018 06:54 PM, Alex Bennée wrote:
>> Alex Bennée <alex.bennee@linaro.org> writes:
>>> Philippe Mathieu-Daudé <f4bug@amsat.org> writes:
>>>
>>>> Tests can change this property to run tests in other
>>>> architectures than the host one.
>>>>
>>>> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
>>>> ---
>>>>  tests/acceptance/avocado_qemu/__init__.py | 17 +++++++++++++----
>>>>  1 file changed, 13 insertions(+), 4 deletions(-)
>>>>
>>>> diff --git a/tests/acceptance/avocado_qemu/__init__.py b/tests/acceptance/avocado_qemu/__init__.py
>>>> index 1e54fd5932..6e9601f5e9 100644
>>>> --- a/tests/acceptance/avocado_qemu/__init__.py
>>>> +++ b/tests/acceptance/avocado_qemu/__init__.py
>>>> @@ -13,6 +13,7 @@ import sys
>>>>
>>>>  import avocado
>>>>
>>>> +HOST_ARCH = os.uname()[4]
>>>
>>> The python docs seem to point to platform as a more stable way of
>>> querying this stuff:
>>>
>>>   platform.machine() => 'x86_64' or 'aarch64'
>>>
>>>>  SRC_ROOT_DIR = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
>>>>  SRC_ROOT_DIR = os.path.abspath(os.path.dirname(SRC_ROOT_DIR))
>>>>  sys.path.append(os.path.join(SRC_ROOT_DIR, 'scripts'))
>>>> @@ -23,12 +24,11 @@ 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):
>>>>      """
>>>>      Picks the path of a QEMU binary, starting either in the current working
>>>>      directory or in the source tree root directory.
>>>>      """
>>>> -    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):
>>>> @@ -41,10 +41,19 @@ def pick_default_qemu_bin():
>>>>
>>>>
>>>>  class Test(avocado.Test):
>>>> +    _arch = HOST_ARCH
>>
>> But actually this is wrong - because the host arch may not boot machines
>> defined in the tests. I suspect each superclass needs to explicitly set
>> it's arch and we should assert it has done so here.

Do you have any suggestion on how we could clear this?

> 
> Hmm but arch-specific tests are protected by the 'arch' tag:
> 
> class BootLinuxConsoleMips(Test):
>     """
>     :avocado: enable
>     :avocado: tags=endian:big
>     :avocado: tags=arch:mips
>     :avocado: tags=board:malta
>     """
> 
> Oh no they aren't, it is just a way to filter which selection of tests
> to run :|

>>>> +
>>>> +    @property
>>>> +    def arch(self):
>>>> +        """
>>>> +        Returns the architecture required to run the current test
>>>> +        """
>>>> +        return self._arch
>>>> +> 
>>
>> --
>> Alex Bennée
>>
>>>>      def setUp(self):
>>>>          self.vm = None
>>>> -        self.qemu_bin = self.params.get('qemu_bin',
>>>> -                                        default=pick_default_qemu_bin())
>>>> +        qemu_bin = pick_default_qemu_bin(self.arch)
>>>> +        self.qemu_bin = self.params.get('qemu_bin', default=qemu_bin)
>>>>          if self.qemu_bin is None:
>>>>              self.cancel("No QEMU binary defined or found in the source tree")
>>>>          self.vm = QEMUMachine(self.qemu_bin)