Add Flags class to base.Context

This patch adds a Flags class to represent the flags passed to
the context.

Flags will contain a set of attributes (for example no_setup and no_teardown).
Those attributes will modify the behaviour of the context.

The attributes added initially are:
* 'no_setup' (default: False)
* 'no_teardown' (default: False)

In future patches, they will be used by the context to:
* Change the name of the context.
* Skip the deploy() and undeploy() methods to keep the VNFs active after the
  testcases are run.

JIRA: YARDSTICK-886
Change-Id: I734b082aa101649eea8991304a8b753ae96aa9de
Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>
Signed-off-by: Emma Foley <emma.l.foley@intel.com>

1 files changed, 24 insertions, 1 deletions

diff --git a/yardstick/benchmark/contexts/base.py b/yardstick/benchmark/contexts/base.py
index c9b5b51c9..20c160cfb 100644
--- a/yardstick/benchmark/contexts/base.py
+++ b/yardstick/benchmark/contexts/base.py
@@ -6,13 +6,36 @@
 # which accompanies this distribution, and is available at
 # http://www.apache.org/licenses/LICENSE-2.0
 ##############################################################################
-from __future__ import absolute_import
 import abc
 import six
 
 import yardstick.common.utils as utils
 
 
+class Flags(object):
+    """Class to represent the status of the flags in a context"""
+
+    _FLAGS = {'no_setup': False,
+              'no_teardown': False}
+
+    def __init__(self, **kwargs):
+        for name, value in self._FLAGS.items():
+            setattr(self, name, value)
+
+        for name, value in ((name, value) for (name, value) in kwargs.items()
+                            if name in self._FLAGS):
+            setattr(self, name, value)
+
+    def parse(self, **kwargs):
+        """Read in values matching the flags stored in this object"""
+        if not kwargs:
+            return
+
+        for name, value in ((name, value) for (name, value) in kwargs.items()
+                            if name in self._FLAGS):
+            setattr(self, name, value)
+
+
 @six.add_metaclass(abc.ABCMeta)
 class Context(object):
     """Class that represents a context in the logical model"""