Refactoring of args and parser variable in ci/run_tests, prepare_env

Can't import run_tests in test_run_tests.py (new unit test file).
It is throwing error: nosetests: error: unrecognized arguments

It is because of declaration of parser and args which are global
in file, So to allow safe import of this file,
we need to declare it into __main__ branch.

Change-Id: Ie11ebcfd8a1b8e692bd8bf4260a54f752b67fd5e
Signed-off-by: ashishk1994 <ashishk.iiit@gmail.com>

2 files changed, 57 insertions, 35 deletions

diff --git a/functest/ci/prepare_env.py b/functest/ci/prepare_env.py
index 3df3a0e0e..77bb14a88 100755
--- a/functest/ci/prepare_env.py
+++ b/functest/ci/prepare_env.py
@@ -29,12 +29,6 @@ import functest.utils.openstack_utils as os_utils
 from functest.utils.constants import CONST
 
 actions = ['start', 'check']
-parser = argparse.ArgumentParser()
-parser.add_argument("action", help="Possible actions are: "
-                    "'{d[0]}|{d[1]}' ".format(d=actions))
-parser.add_argument("-d", "--debug", help="Debug mode", action="store_true")
-args = parser.parse_args()
-
 
 """ logging configuration """
 logger = ft_logger.Logger("prepare_env").getLogger()
@@ -48,6 +42,19 @@ with open(CONFIG_PATCH_PATH) as f:
     functest_patch_yaml = yaml.safe_load(f)
 
 
+class PrepareEnvParser():
+
+    def __init__(self):
+        self.parser = argparse.ArgumentParser()
+        self.parser.add_argument("action", help="Possible actions are: "
+                                 "'{d[0]}|{d[1]}' ".format(d=actions))
+        self.parser.add_argument("-d", "--debug", help="Debug mode",
+                                 action="store_true")
+
+    def parse_args(self, argv=[]):
+        return vars(self.parser.parse_args(argv))
+
+
 def print_separator():
     logger.info("==============================================")
 
@@ -270,12 +277,12 @@ def check_environment():
     logger.info("Functest environment installed.")
 
 
-def main():
-    if not (args.action in actions):
+def main(**kwargs):
+    if not (kwargs['action'] in actions):
         logger.error('Argument not valid.')
         sys.exit()
 
-    if args.action == "start":
+    if kwargs['action'] == "start":
         logger.info("######### Preparing Functest environment #########\n")
         check_env_variables()
         create_directories()
@@ -289,11 +296,13 @@ def main():
 
         check_environment()
 
-    if args.action == "check":
+    if kwargs['action'] == "check":
         check_environment()
 
     exit(0)
 
 
 if __name__ == '__main__':
-    main()
+    parser = PrepareEnvParser()
+    args = parser.parse_args(sys.argv[1:])
+    main(**args)
diff --git a/functest/ci/run_tests.py b/functest/ci/run_tests.py
index 7aac9d2cf..722929d20 100755
--- a/functest/ci/run_tests.py
+++ b/functest/ci/run_tests.py
@@ -26,17 +26,6 @@ import functest.utils.openstack_snapshot as os_snapshot
 import functest.utils.openstack_utils as os_utils
 from functest.utils.constants import CONST
 
-parser = argparse.ArgumentParser()
-parser.add_argument("-t", "--test", dest="test", action='store',
-                    help="Test case or tier (group of tests) to be executed. "
-                    "It will run all the test if not specified.")
-parser.add_argument("-n", "--noclean", help="Do not clean OpenStack resources"
-                    " after running each test (default=false).",
-                    action="store_true")
-parser.add_argument("-r", "--report", help="Push results to database "
-                    "(default=false).", action="store_true")
-args = parser.parse_args()
-
 
 """ logging configuration """
 logger = ft_logger.Logger("run_tests").getLogger()
@@ -49,6 +38,26 @@ EXEC_SCRIPT = ("%s/functest/ci/exec_test.sh" % CONST.dir_repo_functest)
 # this variable will change to -1
 
 
+class RunTestsParser():
+
+    def __init__(self):
+        self.parser = argparse.ArgumentParser()
+        self.parser.add_argument("-t", "--test", dest="test", action='store',
+                                 help="Test case or tier (group of tests) "
+                                 "to be executed. It will run all the test "
+                                 "if not specified.")
+        self.parser.add_argument("-n", "--noclean", help="Do not clean "
+                                 "OpenStack resources after running each "
+                                 "test (default=false).",
+                                 action="store_true")
+        self.parser.add_argument("-r", "--report", help="Push results to "
+                                 "database (default=false).",
+                                 action="store_true")
+
+    def parse_args(self, argv=[]):
+        return vars(self.parser.parse_args(argv))
+
+
 class GlobalVariables:
     EXECUTED_TEST_CASES = []
     OVERALL_RESULT = 0
@@ -118,7 +127,7 @@ def get_run_dict_if_defined(testname):
         return None
 
 
-def run_test(test, tier_name):
+def run_test(test, tier_name, testcases=None):
     result_str = "PASS"
     start = datetime.datetime.now()
     test_name = test.get_name()
@@ -174,7 +183,7 @@ def run_test(test, tier_name):
         result_str = "FAIL"
 
         if test.is_blocking():
-            if not args.test or args.test == "all":
+            if not testcases or testcases == "all":
                 logger.info("This test case is blocking. Aborting overall "
                             "execution.")
                 # if it is a single test we don't print the whole results table
@@ -222,7 +231,7 @@ def run_all(tiers):
     generate_report.main(GlobalVariables.EXECUTED_TEST_CASES)
 
 
-def main():
+def main(**kwargs):
 
     CI_INSTALLER_TYPE = CONST.INSTALLER_TYPE
     CI_SCENARIO = CONST.DEPLOY_SCENARIO
@@ -230,27 +239,29 @@ def main():
     file = CONST.functest_testcases_yaml
     _tiers = tb.TierBuilder(CI_INSTALLER_TYPE, CI_SCENARIO, file)
 
-    if args.noclean:
+    if kwargs['noclean']:
         GlobalVariables.CLEAN_FLAG = False
 
-    if args.report:
+    if kwargs['report']:
         GlobalVariables.REPORT_FLAG = True
 
-    if args.test:
+    if kwargs['test']:
         source_rc_file()
-        if _tiers.get_tier(args.test):
-            run_tier(_tiers.get_tier(args.test))
+        if _tiers.get_tier(kwargs['test']):
+            run_tier(_tiers.get_tier(kwargs['test']))
 
-        elif _tiers.get_test(args.test):
-            run_test(_tiers.get_test(args.test), _tiers.get_tier(args.test))
+        elif _tiers.get_test(kwargs['test']):
+            run_test(_tiers.get_test(kwargs['test']),
+                     _tiers.get_tier(kwargs['test']),
+                     kwargs['test'])
 
-        elif args.test == "all":
+        elif kwargs['test'] == "all":
             run_all(_tiers)
 
         else:
             logger.error("Unknown test case or tier '%s', or not supported by "
                          "the given scenario '%s'."
-                         % (args.test, CI_SCENARIO))
+                         % (kwargs['test'], CI_SCENARIO))
             logger.debug("Available tiers are:\n\n%s"
                          % _tiers)
     else:
@@ -261,4 +272,6 @@ def main():
 
 
 if __name__ == '__main__':
-    main()
+    parser = RunTestsParser()
+    args = parser.parse_args(sys.argv[1:])
+    main(**args)