Hi Cleber,

On 9/24/19 4:45 PM, Cleber Rosa wrote:
Currently a test can describe the target architecture binary that it
should primarily be run with, be setting a single tag value.

The same approach is expected to be done with other QEMU aspects to be
tested, for instance, the machine type and accelerator, so let's
generalize the logic into a utility method.

Signed-off-by: Cleber Rosa <cr...@redhat.com>
---
  tests/acceptance/avocado_qemu/__init__.py | 19 +++++++++++++------
  1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/tests/acceptance/avocado_qemu/__init__.py 
b/tests/acceptance/avocado_qemu/__init__.py
index bd41e0443c..02775bafcf 100644
--- a/tests/acceptance/avocado_qemu/__init__.py
+++ b/tests/acceptance/avocado_qemu/__init__.py
@@ -54,14 +54,21 @@ def pick_default_qemu_bin(arch=None):
class Test(avocado.Test):
+    def _get_unique_tag_val(self, tag_name):
+        """
+        Gets a tag value, if unique for a key
+        """
+        vals = self.tags.get(tag_name, [])
+        if len(vals) == 1:


An small optimization:

if vals:

  return vals.pop()


+            return vals.pop()
+        return None

Does it allows to express a scenario like "I want my test method to run on x86_64 and aarch64" using tags? If so, _get_unique_tag_val logic returns None for multi-value tags (e.g. 'tags=arch:x86_64,arch:aarch64').

Thanks,

Wainer

+
      def setUp(self):
          self._vms = {}
-        arches = self.tags.get('arch', [])
-        if len(arches) == 1:
-            arch = arches.pop()
-        else:
-            arch = None
-        self.arch = self.params.get('arch', default=arch)
+
+        self.arch = self.params.get('arch',
+                                    default=self._get_unique_tag_val('arch'))
+
          default_qemu_bin = pick_default_qemu_bin(arch=self.arch)
          self.qemu_bin = self.params.get('qemu_bin',
                                          default=default_qemu_bin)


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