[PATCH v2 07/29] tests/acceptance: Use the 'arch' tag to verify QEMU binary target

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

We already use the 'arch' tag in Avocado tests. Tests can set
it to restrict their use on a particular target architecture.

If the QEMU binary does not target the required architecture,
the tests will be cancelled (skipped):

  $ avocado --show=app run tests/acceptance/boot_linux_console.py
   ...
   (14/19) BootLinuxConsole.test_arm_cubieboard_initrd: CANCEL: Test expects arch 'arm' while QEMU binary is targetting 'mips' (0.16 s)
   (15/19) BootLinuxConsole.test_arm_cubieboard_sata: CANCEL: Test expects arch 'arm' while QEMU binary is targetting 'mips' (0.18 s)
   (16/19) BootLinuxConsole.test_s390x_s390_ccw_virtio: CANCEL: Test expects arch 's390x' while QEMU binary is targetting 'mips' (0.14 s)
   (17/19) BootLinuxConsole.test_alpha_clipper: CANCEL: Test expects arch 'alpha' while QEMU binary is targetting 'mips' (0.16 s)
   (18/19) BootLinuxConsole.test_ppc64_pseries: CANCEL: Test expects arch 'ppc64' while QEMU binary is targetting 'mips' (0.18 s)
   (19/19) BootLinuxConsole.test_m68k_q800: CANCEL: Test expects arch 'm68k' while QEMU binary is targetting 'mips' (0.17 s)
  RESULTS    : PASS 2 | ERROR 0 | FAIL 0 | SKIP 1 | WARN 0 | INTERRUPT 0 | CANCEL 16
  JOB TIME   : 19.18 s

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 tests/acceptance/avocado_qemu/__init__.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/acceptance/avocado_qemu/__init__.py b/tests/acceptance/avocado_qemu/__init__.py
index 67c75822d5..e7d5affe24 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_arch
 from qemu.binutils import binary_get_version
 from qemu.machine import QEMUMachine
 
@@ -142,6 +143,14 @@ class Test(avocado.Test):
             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]))
 
+        # Verify architecture
+        if self.arch:
+            fmt = "Test expects arch '{}' while QEMU binary is targetting '{}'"
+            bin_arch = binary_get_arch(self.qemu_bin)
+            logger.debug('arch: {}'.format(bin_arch))
+            if bin_arch != self.arch:
+                self.cancel(fmt.format(self.arch, bin_arch))
+
     def _new_vm(self, *args):
         vm = QEMUMachine(self.qemu_bin, sock_dir=tempfile.mkdtemp())
         if args:
-- 
2.21.1