CSIT-190 Add honeycomb interface management test

 - add test for specific issue with interface management through netconf
 - add keywords used in test
 - update methods that manage Netconf communication
 - update notifications tests to reuse more code

Change-Id: I11788e18f05c4965160f247c3811d270d2c91170
Signed-off-by: selias <samelias@cisco.com>

1 files changed, 12 insertions, 107 deletions

diff --git a/resources/libraries/python/honeycomb/Notifications.py b/resources/libraries/python/honeycomb/Notifications.py
index 62cda16cf2..512a6cbb08 100644
--- a/resources/libraries/python/honeycomb/Notifications.py
+++ b/resources/libraries/python/honeycomb/Notifications.py
@@ -13,131 +13,35 @@
 
 """Implementation of keywords for managing Honeycomb notifications."""
 
-from time import time
-
-import paramiko
 from robot.api import logger
-from interruptingcow import timeout
 
 from resources.libraries.python.honeycomb.HoneycombUtil import HoneycombError
+from resources.libraries.python.honeycomb.Netconf import Netconf
 
 
-class Notifications(object):
-    """Implements keywords for managing Honeycomb notifications.
+class Notifications(Netconf):
+    """Implements keywords for receiving Honeycomb notifications.
 
     The keywords implemented in this class make it possible to:
-    - establish SSH session to Honeycomb host
     - receive notifications from Honeycomb
     - read received notifications
     """
 
-    def __init__(self, hello, subscription):
-        """Initializer.
-        :param hello: Hello message to be sent to Honeycomb.
-        :param subscription: rpc command to subscribe to Honeycomb notifications
-        over Netconf.
-        :type hello: str
-        :type subscription: str
-
-        Note: Passing the channel object as a robotframework argument closes
-        the channel. Class variables are used instead,
-        to persist the connection channel throughout the test case.
-        """
-
-        self.client = None
-        self.channel = None
-        self.hello = hello
-        self.subscription = subscription
-
-    def create_session(self, node, time_out=10):
-        """Create an SSH session and connect to Honeycomb on the specified node.
-
-        :param node: Honeycomb node.
-        :param time_out: Timeout value for the connection in seconds.
-        :type node: dict
-        :type time_out: int
-        """
-
-        start = time()
-        client = paramiko.SSHClient()
-        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
-
-        client.connect(node['host'],
-                       username=node['honeycomb']['user'],
-                       password=node['honeycomb']['passwd'],
-                       pkey=None,
-                       port=node['honeycomb']['netconf_port'],
-                       timeout=time_out,
-                       )
-
-        logger.trace('Connect took {0} seconds'.format(time() - start))
-        logger.debug('New ssh: {0}'.format(client))
-        logger.debug('Connect peer: {0}'.
-                     format(client.get_transport().getpeername()))
-        logger.debug(client)
-
-        channel = client.get_transport().open_session()
-        channel.settimeout(time_out)
-        channel.get_pty()
-        channel.invoke_subsystem("netconf")
-        logger.debug(channel)
-
-        self.client = client
-        self.channel = channel
-
-        # read OpenDaylight's hello message and capability list
-        self._get_response(
-            size=131072,
-            time_out=time_out,
-            err="Timeout on getting hello message."
-        )
-
-        self.channel.send(self.hello)
-        if not self.channel.active:
-            raise HoneycombError("Channel closed on capabilities exchange.")
-
-    def _get_response(self, size=4096, time_out=10, err="Unspecified Error."):
-        """Iteratively read data from the receive buffer and catenate together
-        until message ends with the message delimiter, or
-        until timeout is reached.
-
-        :param size: Maximum number of bytes to read in one iteration.
-        :param time_out: Timeout value for getting the complete response.
-        :param err: Error message to provide when timeout is reached.
-        :type size:int
-        :type time_out:int
-        :type err:str
-        :return: Content of response.
-        :rtype: str
-        :raises HoneycombError: If the read process times out.
-        """
-
-        reply = ''
-
-        try:
-            with timeout(time_out, exception=RuntimeError):
-                while not reply.endswith(']]>]]>'):
-                    if self.channel.recv_ready():
-                        reply += self.channel.recv(size)
-
-        except RuntimeError:
-            raise HoneycombError(err+" Content of buffer: {0}".format(reply))
-
-        logger.trace(reply)
-        return reply
-
-    def add_notification_listener(self, time_out=10):
+    def add_notification_listener(self, subscription, time_out=10):
         """Open a new channel on the SSH session, connect to Netconf subsystem
         and subscribe to receive Honeycomb notifications.
 
+        :param subscription: RPC for subscription to notifications.
         :param time_out: Timeout value for each read operation in seconds.
+        :type subscription: str
         :type time_out: int
         :raises HoneycombError: If subscription to notifications fails.
         """
 
-        self.channel.send(self.subscription)
+        logger.debug(subscription)
+        self.send(subscription)
 
-        reply = self._get_response(
+        reply = self.get_response(
             time_out=time_out,
             err="Timeout on notifications subscription."
         )
@@ -157,9 +61,10 @@ class Notifications(object):
         :rtype: str
         """
 
-        logger.debug("Getting notification.")
+        logger.debug("Getting notification. Timeout set to {0} seconds."
+                     .format(time_out))
 
-        reply = self._get_response(
+        reply = self.get_response(
             time_out=time_out,
             err="Timeout on getting notification."
         )