[PATCH v2 04/29] tests/acceptance: Use 'version-min' tag to verify QEMU binary version

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Introduce the 'version-min' tag.
Tests can set it to the minimum version of QEMU they require.
If QEMU is older, the tests will be cancelled (skipped):

  $ python -m avocado --show=app run tests/acceptance/x86_cpu_model_versions.py
   (01/11) X86CPUModelAliases.test_4_0_alias_compatibility: CANCEL: Test expects version '4.1' but QEMU binary is '3.1.1' (0.10 s)
   (02/11) X86CPUModelAliases.test_4_1_alias: CANCEL: Test expects version '4.1' but QEMU binary is '3.1.1' (0.10 s)
   (03/11) X86CPUModelAliases.test_none_alias: CANCEL: Test expects version '4.1' but QEMU binary is '3.1.1' (0.10 s)
   ...

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 tests/acceptance/avocado_qemu/__init__.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/tests/acceptance/avocado_qemu/__init__.py b/tests/acceptance/avocado_qemu/__init__.py
index 6618ea67c1..67c75822d5 100644
--- a/tests/acceptance/avocado_qemu/__init__.py
+++ b/tests/acceptance/avocado_qemu/__init__.py
@@ -19,6 +19,7 @@ import avocado
 SRC_ROOT_DIR = os.path.join(os.path.dirname(__file__), '..', '..', '..')
 sys.path.append(os.path.join(SRC_ROOT_DIR, 'python'))
 
+from qemu.binutils import binary_get_version
 from qemu.machine import QEMUMachine
 
 def is_readable_executable_file(path):
@@ -111,6 +112,7 @@ class Test(avocado.Test):
 
     def setUp(self):
         self._vms = {}
+        logger = logging.getLogger('core')
 
         self.arch = self.params.get('arch',
                                     default=self._get_unique_tag_val('arch'))
@@ -118,12 +120,28 @@ class Test(avocado.Test):
         self.machine = self.params.get('machine',
                                        default=self._get_unique_tag_val('machine'))
 
+        # Verify qemu_bin
         default_qemu_bin = pick_default_qemu_bin(arch=self.arch)
         self.qemu_bin = self.params.get('qemu_bin',
                                         default=default_qemu_bin)
         if self.qemu_bin is None:
             self.cancel("No QEMU binary defined or found in the source tree")
 
+        # Verify version
+        min_version = self._get_unique_tag_val('version-min')
+        logger.debug('version-min: {}'.format(min_version))
+        if min_version:
+            min_v = [int(n) for n in min_version.split('.')]
+            if len(min_v) < 3:
+                min_v.append(0)
+            logger.debug(min_v)
+            bin_v = binary_get_version(self.qemu_bin)
+            bin_v = (bin_v['major'], bin_v['minor'], bin_v['micro'])
+            logger.debug(bin_v)
+            fmt = "Test expects version '{}' but QEMU binary is '{}.{}.{}'"
+            if bin_v[0] < min_v[0] or bin_v[1] < min_v[1] or bin_v[2] < min_v[2]:
+                self.cancel(fmt.format(min_version, bin_v[0], bin_v[1], bin_v[2]))
+
     def _new_vm(self, *args):
         vm = QEMUMachine(self.qemu_bin, sock_dir=tempfile.mkdtemp())
         if args:
-- 
2.21.1