service.py: add mask, unmask and reset-failed to systemd

reset-failed, mask, unmask options are added to service management
((majority of which are transerred from
https://github.com/avocado-framework/avocado-vt/blob/master/virttest/staging/service.py)
- see avocado-framework/avocado-vt#1565)
Signed-off-by: NRadek Duda <rduda@redhat.com>

avocado/utils/service.py

@@ -277,6 +277,11 @@ def sys_v_init_command_generator(command):
             target = convert_systemd_target_to_runlevel(target)
             return ["telinit", target]
         return set_target_command
+    # Do not need reset failed, mask and unmask in sys_v style system.
+    elif command in ["reset_failed", "mask", "unmask"]:
+        def true_command(service_name):
+            return ["true"]
+        return true_command
 
     def method(service_name):
         return [command_name, service_name, command]
@@ -316,6 +321,8 @@ def systemd_command_generator(command):
         def set_target_command(target):
             return [command_name, "isolate", target]
         return set_target_command
+    elif command == "reset_failed":
+        command = "reset-failed"
 
     def method(service_name):
         return [command_name, command, "%s.service" % service_name]
@@ -335,6 +342,9 @@ COMMANDS = (
     ("is_enabled", False),
     ("list", False),
     ("set_target", True),
+    ("reset_failed", True),
+    ("mask", True),
+    ("unmask", True)
 )
 
 

selftests/unit/test_utils_service.py

@@ -67,6 +67,8 @@ class TestSystemd(unittest.TestCase):
                 self.service_command_generator, cmd)(self.service_name)
             if cmd == "is_enabled":
                 cmd = "is-enabled"
+            if cmd == "reset_failed":
+                cmd = "reset-failed"
             self.assertEqual(ret, ["systemctl", cmd, "%s.service" % self.service_name])
 
     def test_set_target(self):
@@ -88,7 +90,8 @@ class TestSysVInit(unittest.TestCase):
         command_name = "service"
         for cmd, _ in ((c, r) for (c, r) in
                        self.service_command_generator.commands if
-                       c not in ["list", "set_target"]):
+                       c not in ["list", "set_target", "reset_failed", "mask",
+                                 "unmask"]):
             ret = getattr(
                 self.service_command_generator, cmd)(self.service_name)
             if cmd == "is_enabled":