tests/acceptance/avocado_qemu/__init__.py

   1 # Test class and utilities for functional tests
   2 #
   3 # Copyright (c) 2018 Red Hat, Inc.
   4 #
   5 # Author:
   6 #  Cleber Rosa <crosa@redhat.com>
   7 #
   8 # This work is licensed under the terms of the GNU GPL, version 2 or
   9 # later.  See the COPYING file in the top-level directory.
  10
  11 import os
  12 import sys
  13 import uuid
  14
  15 import avocado
  16
  17 SRC_ROOT_DIR = os.path.join(os.path.dirname(__file__), '..', '..', '..')
  18 sys.path.append(os.path.join(SRC_ROOT_DIR, 'python'))
  19
  20 from qemu import QEMUMachine
  21
  22 def is_readable_executable_file(path):
  23     return os.path.isfile(path) and os.access(path, os.R_OK | os.X_OK)
  24
  25
  26 def pick_default_qemu_bin():
  27     """
  28     Picks the path of a QEMU binary, starting either in the current working
  29     directory or in the source tree root directory.
  30     """
  31     arch = os.uname()[4]
  32     qemu_bin_relative_path = os.path.join("%s-softmmu" % arch,
  33                                           "qemu-system-%s" % arch)
  34     if is_readable_executable_file(qemu_bin_relative_path):
  35         return qemu_bin_relative_path
  36
  37     qemu_bin_from_src_dir_path = os.path.join(SRC_ROOT_DIR,
  38                                               qemu_bin_relative_path)
  39     if is_readable_executable_file(qemu_bin_from_src_dir_path):
  40         return qemu_bin_from_src_dir_path
  41
  42
  43 class Test(avocado.Test):
  44     def setUp(self):
  45         self._vms = {}
  46         self.qemu_bin = self.params.get('qemu_bin',
  47                                         default=pick_default_qemu_bin())
  48         if self.qemu_bin is None:
  49             self.cancel("No QEMU binary defined or found in the source tree")
  50
  51     def _new_vm(self, *args):
  52         vm = QEMUMachine(self.qemu_bin)
  53         if args:
  54             vm.add_args(*args)
  55         return vm
  56
  57     @property
  58     def vm(self):
  59         return self.get_vm(name='default')
  60
  61     def get_vm(self, *args, name=None):
  62         if not name:
  63             name = str(uuid.uuid4())
  64         if self._vms.get(name) is None:
  65             self._vms[name] = self._new_vm(*args)
  66         return self._vms[name]
  67
  68     def tearDown(self):
  69         for vm in self._vms.values():
  70             vm.shutdown()