Add Honeycomb persistence tests

[csit.git] / resources / libraries / python / honeycomb / HcPersistence.py

diff --git a/resources/libraries/python/honeycomb/HcPersistence.py b/resources/libraries/python/honeycomb/HcPersistence.py
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+++ b/resources/libraries/python/honeycomb/HcPersistence.py
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+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Implementation of keywords for managing Honeycomb persistence files."""
+
+from robot.api import logger
+
+from resources.libraries.python.constants import Constants as Const
+from resources.libraries.python.honeycomb.HoneycombUtil import HoneycombError
+from resources.libraries.python.ssh import SSH
+from resources.libraries.python.topology import NodeType
+
+
+class HcPersistence(object):
+    """Implements keywords for managing Honeycomb persistence files.
+
+    The keywords implemented in this class make possible to:
+    - find and replace strings in config.json persistence file
+    """
+
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def clear_persisted_honeycomb_config(*nodes):
+        """Remove configuration data persisted from last Honeycomb session.
+        Default configuration will be used instead.
+
+        :param nodes: List of DUTs to execute on.
+        :type nodes: list
+        :raises HoneycombError: If persisted configuration could not be removed.
+        """
+        cmd = "rm {0}/etc/opendaylight/honeycomb/*".format(
+            Const.REMOTE_HC_DIR)
+        for node in nodes:
+            if node['type'] == NodeType.DUT:
+                ssh = SSH()
+                ssh.connect(node)
+                (ret_code, _, stderr) = ssh.exec_command_sudo(cmd)
+                if ret_code != 0:
+                    if "No such file or directory" not in stderr:
+                        raise HoneycombError('Could not clear persisted '
+                                             'configuration on node {0}, {1}'
+                                             .format(node['host'], stderr))
+                    else:
+                        logger.info("Persistence data was not present on node"
+                                    " {0}".format(node['host']))
+                else:
+                    logger.info("Persistence files removed on node {0}"
+                                .format(node['host']))
+
+    @staticmethod
+    def modify_persistence_files(node, find, replace):
+        """Searches contents of persistence file config.json for the provided
+         string, and replaces all occurrences with another string.
+
+        :param node: Honeycomb node.
+        :param find: Text to find in file.
+        :param replace: String to replace anything found with.
+        :type node: dict
+        :type find: string
+        :type replace: string
+        :raises HoneycombError: If persistent configuration couldn't be
+        modified.
+        """
+
+        argument = "\"s/{0}/{1}/g\"".format(find, replace)
+        path = "{0}/etc/opendaylight/honeycomb/config.json".format(
+            Const.REMOTE_HC_DIR)
+        command = "sed -i {0} {1}".format(argument, path)
+
+        ssh = SSH()
+        ssh.connect(node)
+        (ret_code, _, stderr) = ssh.exec_command_sudo(command)
+        if ret_code != 0:
+            raise HoneycombError("Failed to modify persistence file on node"
+                                 " {0}, {1}".format(node, stderr))