Adding python tests and updating for conventions

- adding tests dir with a script to run python coverage
- adding main funtion to python per convention
- replacing underscores with dashes in CLI params per convention

Change-Id: I6f64174278e2a2e93eacdb7bee09aac49ce15d29
Signed-off-by: Dan Radez <dradez@redhat.com>

2 files changed, 123 insertions, 76 deletions

diff --git a/lib/common-functions.sh b/lib/common-functions.sh
index 244d7585..069b3349 100644
--- a/lib/common-functions.sh
+++ b/lib/common-functions.sh
@@ -18,7 +18,7 @@ function find_ip {
     return 1
   fi
 
-  python3.4 -B $LIB/python/apex-python-utils.py find_ip -i $1
+  python3.4 -B $LIB/python/apex-python-utils.py find-ip -i $1
 }
 
 ##attach interface to OVS and set the network config correctly
diff --git a/lib/python/apex-python-utils.py b/lib/python/apex-python-utils.py
index 7e947ea6..4eee4f75 100755
--- a/lib/python/apex-python-utils.py
+++ b/lib/python/apex-python-utils.py
@@ -1,5 +1,5 @@
 ##############################################################################
-# Copyright (c) 2016 Feng Pan (fpan@redhat.com)
+# Copyright (c) 2016 Feng Pan (fpan@redhat.com), Dan Radez (dradez@redhat.com)
 #
 # All rights reserved. This program and the accompanying materials
 # are made available under the terms of the Apache License, Version 2.0
@@ -15,86 +15,133 @@ import os
 from jinja2 import Environment, FileSystemLoader
 
 
-def parse_net_settings(settings_args):
-    settings = apex.NetworkSettings(settings_args.path,
-                                    settings_args.network_isolation)
+def parse_net_settings(args):
+    """
+    Parse OPNFV Apex network_settings.yaml config file
+    and dump bash syntax to set environment variables
+
+    Args:
+    - file: string
+      file to network_settings.yaml file
+    - network_isolation: bool
+      enable or disable network_isolation
+    """
+    settings = apex.NetworkSettings(args.file,
+                                    args.network_isolation)
     settings.dump_bash()
 
-def parse_deploy_settings(settings_args):
-    settings = apex.DeploySettings(settings_args.path)
+def parse_deploy_settings(args):
+    settings = apex.DeploySettings(args.file)
     settings.dump_bash()
 
 
-def find_ip(int_args):
-    interface = apex.ip_utils.get_interface(int_args.interface,
-                                      int_args.address_family)
+def find_ip(args):
+    """
+    Get and print the IP from a specific interface
+
+    Args:
+    - interface: string
+      network interface name
+    - address_family: int
+      4 or 6, respective to ipv4 or ipv6
+    """
+    interface = apex.ip_utils.get_interface(args.interface,
+                                            args.address_family)
     if interface:
         print(interface.ip)
 
 
-def build_nic_template(nic_args):
-    env = Environment(loader=FileSystemLoader(nic_args.template_directory))
-    template = env.get_template(nic_args.template_filename)
-    print(template.render(enabled_networks=nic_args.enabled_networks,
-                          external_net_type=nic_args.ext_net_type,
-                          external_net_af=nic_args.address_family))
-
-
-parser = argparse.ArgumentParser()
-parser.add_argument('--DEBUG', action='store_true', default=False,
-                    help="Turn on debug messages")
-subparsers = parser.add_subparsers()
-
-net_settings = subparsers.add_parser('parse_net_settings',
-                                     help='Parse network settings file')
-net_settings.add_argument('-n', '--path', default='network_settings.yaml',
-                          help='path to network settings file')
-net_settings.add_argument('-i', '--network_isolation', type=bool, default=True,
-                          help='network isolation')
-net_settings.set_defaults(func=parse_net_settings)
-
-get_int_ip = subparsers.add_parser('find_ip',
-                                   help='Find interface ip')
-get_int_ip.add_argument('-i', '--interface', required=True,
-                        help='Interface name')
-get_int_ip.add_argument('-af', '--address_family', default=4, type=int,
-                        choices=[4, 6],
-                        help='IP Address family')
-get_int_ip.set_defaults(func=find_ip)
-
-nic_template = subparsers.add_parser('nic_template', help='Build NIC templates')
-nic_template.add_argument('-d', '--template_directory', required=True,
-                          help='Template file directory')
-nic_template.add_argument('-f', '--template_filename', required=True,
-                          help='Template file to process')
-nic_template.add_argument('-n', '--enabled_networks', required=True,
-                          help='enabled network list')
-nic_template.add_argument('-e', '--ext_net_type', default='interface',
-                          choices=['interface', 'br-ex'],
-                          help='External network type')
-nic_template.add_argument('-af', '--address_family', type=int, default=4,
-                          help='IP address family')
-nic_template.set_defaults(func=build_nic_template)
-
-deploy_settings = subparsers.add_parser('parse-deploy-settings',
-                                        help='Parse deploy settings file')
-deploy_settings.add_argument('-f', '--path', default='deploy_settings.yaml',
-                             help='path to deploy settings file')
-deploy_settings.set_defaults(func=parse_deploy_settings)
-
-args = parser.parse_args(sys.argv[1:])
-if args.DEBUG:
-    logging.basicConfig(level=logging.DEBUG)
-else:
-    apex_log_filename = '/var/log/apex/apex.log'
-    os.makedirs(os.path.dirname(apex_log_filename), exist_ok=True)
-    logging.basicConfig(filename=apex_log_filename,
-                        format='%(asctime)s %(levelname)s: %(message)s',
-                        datefmt='%m/%d/%Y %I:%M:%S %p',
-                        level=logging.DEBUG)
-
-if hasattr(args, 'func'):
-    args.func(args)
-else:
-    parser.print_help()
-    exit(1)
+def build_nic_template(args):
+    """
+    Build and print a Triple-O nic template from jinja template
+
+    Args:
+    - template: string
+      path to jinja template to load
+    - enabled_networks: comma delimited list
+      list of networks defined in net_env.py
+    - ext_net_type: string
+      interface or br-ex, defines the external network configuration
+    - address_family: string
+      4 or 6, respective to ipv4 or ipv6
+    """
+    dir, template = args.template.rsplit('/', 1)
+
+    env = Environment(loader=FileSystemLoader(dir))
+    template = env.get_template(template)
+    print(template.render(enabled_networks=args.enabled_networks,
+                          external_net_type=args.ext_net_type,
+                          external_net_af=args.address_family))
+
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--debug', action='store_true', default=False,
+                        help="Turn on debug messages")
+    parser.add_argument('-l', '--log-file', default='/var/log/apex/apex.log',
+                        dest='log_file', help="Log file to log to")
+    subparsers = parser.add_subparsers()
+
+    net_settings = subparsers.add_parser('parse-net-settings',
+                                         help='Parse network settings file')
+    net_settings.add_argument('-f', '--file', default='network-settings.yaml',
+                              help='path to network settings file')
+    net_settings.add_argument('-i', '--network-isolation', type=bool,
+                              default=True, dest='network_isolation',
+                              help='network isolation')
+    net_settings.set_defaults(func=parse_net_settings)
+
+    get_int_ip = subparsers.add_parser('find-ip',
+                                       help='Find interface ip')
+    get_int_ip.add_argument('-i', '--interface', required=True,
+                            help='Interface name')
+    get_int_ip.add_argument('-af', '--address-family', default=4, type=int,
+                            choices=[4, 6], dest='address_family',
+                            help='IP Address family')
+    get_int_ip.set_defaults(func=find_ip)
+
+    nic_template = subparsers.add_parser('nic-template',
+                                         help='Build NIC templates')
+    nic_template.add_argument('-t', '--template', required=True,
+                              dest='template',
+                              help='Template file to process')
+    nic_template.add_argument('-n', '--enabled-networks', required=True,
+                              dest='enabled_networks',
+                              help='enabled network list')
+    nic_template.add_argument('-e', '--ext-net-type', default='interface',
+                              dest='ext_net_type',
+                              choices=['interface', 'br-ex'],
+                              help='External network type')
+    nic_template.add_argument('-af', '--address-family', type=int, default=4,
+                              dest='address_family', help='IP address family')
+    nic_template.set_defaults(func=build_nic_template)
+
+    deploy_settings = subparsers.add_parser('parse-deploy-settings',
+                              help='Parse deploy settings file')
+    deploy_settings.add_argument('-f', '--file', default='deploy_settings.yaml',
+                              help='path to deploy settings file')
+    deploy_settings.set_defaults(func=parse_deploy_settings)
+
+    args = parser.parse_args(sys.argv[1:])
+    if args.debug:
+        logging.basicConfig(level=logging.DEBUG)
+    else:
+        apex_log_filename = args.log_file
+        os.makedirs(os.path.dirname(apex_log_filename), exist_ok=True)
+        logging.basicConfig(filename=apex_log_filename,
+                            format='%(asctime)s %(levelname)s: %(message)s',
+                            datefmt='%m/%d/%Y %I:%M:%S %p',
+                            level=logging.DEBUG)
+    return parser, args
+
+
+def main(parser, args):
+    if hasattr(args, 'func'):
+        args.func(args)
+    else:
+        parser.print_help()
+        exit(1)
+
+if __name__ == "__main__":
+    parser, args = parse_args()
+    main(parser, args)