Replace CONST.* by getattribute/setattr

Directories affected:
 - ci
 - core

and respective unit tests

Change-Id: I6a3d5aa68de29fc5a37ae543a067ff797eba33e6
Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

7 files changed, 181 insertions, 157 deletions

diff --git a/functest/ci/generate_report.py b/functest/ci/generate_report.py
index 7a25fd952..17240e8c0 100644
--- a/functest/ci/generate_report.py
+++ b/functest/ci/generate_report.py
@@ -67,7 +67,7 @@ def print_line(w1, w2='', w3='', w4='', w5=''):
            '| ' + w2.ljust(COL_2_LEN - 1) +
            '| ' + w3.ljust(COL_3_LEN - 1) +
            '| ' + w4.ljust(COL_4_LEN - 1))
-    if CONST.IS_CI_RUN:
+    if CONST.__getattribute__('IS_CI_RUN'):
         str += ('| ' + w5.ljust(COL_5_LEN - 1))
     str += '|\n'
     return str
@@ -75,7 +75,7 @@ def print_line(w1, w2='', w3='', w4='', w5=''):
 
 def print_line_no_columns(str):
     TOTAL_LEN = COL_1_LEN + COL_2_LEN + COL_3_LEN + COL_4_LEN + 2
-    if CONST.IS_CI_RUN:
+    if CONST.__getattribute__('IS_CI_RUN'):
         TOTAL_LEN += COL_5_LEN + 1
     return ('| ' + str.ljust(TOTAL_LEN) + "|\n")
 
@@ -85,7 +85,7 @@ def print_separator(char="=", delimiter="+"):
            delimiter + char * COL_2_LEN +
            delimiter + char * COL_3_LEN +
            delimiter + char * COL_4_LEN)
-    if CONST.IS_CI_RUN:
+    if CONST.__getattribute__('IS_CI_RUN'):
         str += (delimiter + char * COL_5_LEN)
     str += '+\n'
     return str
@@ -94,7 +94,7 @@ def print_separator(char="=", delimiter="+"):
 def main(args=[]):
     executed_test_cases = args
 
-    if CONST.IS_CI_RUN:
+    if CONST.__getattribute__('IS_CI_RUN'):
         results = get_results_from_db()
         if results is not None:
             for test in executed_test_cases:
@@ -103,15 +103,15 @@ def main(args=[]):
                              "result": data['result']})
 
     TOTAL_LEN = COL_1_LEN + COL_2_LEN + COL_3_LEN + COL_4_LEN
-    if CONST.IS_CI_RUN:
+    if CONST.__getattribute__('IS_CI_RUN'):
         TOTAL_LEN += COL_5_LEN
     MID = TOTAL_LEN / 2
 
-    if CONST.BUILD_TAG is not None:
-        if re.search("daily", CONST.BUILD_TAG) is not None:
-            CONST.CI_LOOP = "daily"
+    if CONST.__getattribute__('BUILD_TAG') is not None:
+        if re.search("daily", CONST.__getattribute__('BUILD_TAG')) is not None:
+            CONST.__setattr__('CI_LOOP', 'daily')
         else:
-            CONST.CI_LOOP = "weekly"
+            CONST.__setattr__('CI_LOOP', 'weekly')
 
     str = ''
     str += print_separator('=', delimiter="=")
@@ -120,19 +120,20 @@ def main(args=[]):
     str += print_line_no_columns(' ')
     str += print_line_no_columns(" Deployment description:")
     str += print_line_no_columns("   INSTALLER: %s"
-                                 % CONST.INSTALLER_TYPE)
-    if CONST.DEPLOY_SCENARIO is not None:
+                                 % CONST.__getattribute__('INSTALLER_TYPE'))
+    if CONST.__getattribute__('DEPLOY_SCENARIO') is not None:
         str += print_line_no_columns("   SCENARIO:  %s"
-                                     % CONST.DEPLOY_SCENARIO)
-    if CONST.BUILD_TAG is not None:
+                                     % CONST.__getattribute__(
+                                         'DEPLOY_SCENARIO'))
+    if CONST.__getattribute__('BUILD_TAG') is not None:
         str += print_line_no_columns("   BUILD TAG: %s"
-                                     % CONST.BUILD_TAG)
-    if CONST.CI_LOOP is not None:
+                                     % CONST.__getattribute__('BUILD_TAG'))
+    if CONST.__getattribute__('CI_LOOP') is not None:
         str += print_line_no_columns("   CI LOOP:   %s"
-                                     % CONST.CI_LOOP)
+                                     % CONST.__getattribute__('CI_LOOP'))
     str += print_line_no_columns(' ')
     str += print_separator('=')
-    if CONST.IS_CI_RUN:
+    if CONST.__getattribute__('IS_CI_RUN'):
         str += print_line('TEST CASE', 'TIER', 'DURATION', 'RESULT', 'URL')
     else:
         str += print_line('TEST CASE', 'TIER', 'DURATION', 'RESULT')
diff --git a/functest/ci/prepare_env.py b/functest/ci/prepare_env.py
index 08badf176..9fd07958e 100755
--- a/functest/ci/prepare_env.py
+++ b/functest/ci/prepare_env.py
@@ -34,7 +34,7 @@ handler = None
 pod_arch = None
 arch_filter = ['aarch64']
 
-CONFIG_FUNCTEST_PATH = CONST.CONFIG_FUNCTEST_YAML
+CONFIG_FUNCTEST_PATH = CONST.__getattribute__('CONFIG_FUNCTEST_YAML')
 CONFIG_PATCH_PATH = os.path.join(os.path.dirname(
     CONFIG_FUNCTEST_PATH), "config_patch.yaml")
 CONFIG_AARCH64_PATCH_PATH = os.path.join(os.path.dirname(
@@ -66,63 +66,70 @@ def check_env_variables():
     print_separator()
     logger.info("Checking environment variables...")
 
-    if CONST.INSTALLER_TYPE is None:
+    if CONST.__getattribute__('INSTALLER_TYPE') is None:
         logger.warning("The env variable 'INSTALLER_TYPE' is not defined.")
-        CONST.INSTALLER_TYPE = "undefined"
+        CONST.__setattr__('INSTALLER_TYPE', 'undefined')
     else:
-        if CONST.INSTALLER_TYPE not in opnfv_constants.INSTALLERS:
+        if (CONST.__getattribute__('INSTALLER_TYPE') not in
+                opnfv_constants.INSTALLERS):
             logger.warning("INSTALLER_TYPE=%s is not a valid OPNFV installer. "
                            "Available OPNFV Installers are : %s. "
                            "Setting INSTALLER_TYPE=undefined."
-                           % (CONST.INSTALLER_TYPE,
+                           % (CONST.__getattribute__('INSTALLER_TYPE'),
                               opnfv_constants.INSTALLERS))
-            CONST.INSTALLER_TYPE = "undefined"
+            CONST.__setattr__('INSTALLER_TYPE', 'undefined')
         else:
             logger.info("    INSTALLER_TYPE=%s"
-                        % CONST.INSTALLER_TYPE)
+                        % CONST.__getattribute__('INSTALLER_TYPE'))
 
-    if CONST.INSTALLER_IP is None:
+    if CONST.__getattribute__('INSTALLER_IP') is None:
         logger.warning("The env variable 'INSTALLER_IP' is not defined. "
                        "It is needed to fetch the OpenStack credentials. "
                        "If the credentials are not provided to the "
                        "container as a volume, please add this env variable "
                        "to the 'docker run' command.")
     else:
-        logger.info("    INSTALLER_IP=%s" % CONST.INSTALLER_IP)
+        logger.info("    INSTALLER_IP=%s" %
+                    CONST.__getattribute__('INSTALLER_IP'))
 
-    if CONST.DEPLOY_SCENARIO is None:
+    if CONST.__getattribute__('DEPLOY_SCENARIO') is None:
         logger.warning("The env variable 'DEPLOY_SCENARIO' is not defined. "
                        "Setting CI_SCENARIO=undefined.")
-        CONST.DEPLOY_SCENARIO = "undefined"
+        CONST.__setattr__('DEPLOY_SCENARIO', 'undefined')
     else:
-        logger.info("    DEPLOY_SCENARIO=%s" % CONST.DEPLOY_SCENARIO)
-    if CONST.CI_DEBUG:
-        logger.info("    CI_DEBUG=%s" % CONST.CI_DEBUG)
+        logger.info("    DEPLOY_SCENARIO=%s"
+                    % CONST.__getattribute__('DEPLOY_SCENARIO'))
+    if CONST.__getattribute__('CI_DEBUG'):
+        logger.info("    CI_DEBUG=%s" % CONST.__getattribute__('CI_DEBUG'))
 
-    if CONST.NODE_NAME:
-        logger.info("    NODE_NAME=%s" % CONST.NODE_NAME)
+    if CONST.__getattribute__('NODE_NAME'):
+        logger.info("    NODE_NAME=%s" % CONST.__getattribute__('NODE_NAME'))
 
-    if CONST.BUILD_TAG:
-        logger.info("    BUILD_TAG=%s" % CONST.BUILD_TAG)
+    if CONST.__getattribute__('BUILD_TAG'):
+        logger.info("    BUILD_TAG=%s" % CONST.__getattribute__('BUILD_TAG'))
 
-    if CONST.IS_CI_RUN:
-        logger.info("    IS_CI_RUN=%s" % CONST.IS_CI_RUN)
+    if CONST.__getattribute__('IS_CI_RUN'):
+        logger.info("    IS_CI_RUN=%s" % CONST.__getattribute__('IS_CI_RUN'))
 
 
 def get_deployment_handler():
     global handler
     global pod_arch
 
-    installer_params_yaml = os.path.join(CONST.dir_repo_functest,
-                                         'functest/ci/installer_params.yaml')
-    if (CONST.INSTALLER_IP and CONST.INSTALLER_TYPE and
-            CONST.INSTALLER_TYPE in opnfv_constants.INSTALLERS):
+    installer_params_yaml = os.path.join(
+        CONST.__getattribute__('dir_repo_functest'),
+        'functest/ci/installer_params.yaml')
+    if (CONST.__getattribute__('INSTALLER_IP') and
+        CONST.__getattribute__('INSTALLER_TYPE') and
+            CONST.__getattribute__('INSTALLER_TYPE') in
+            opnfv_constants.INSTALLERS):
         try:
             installer_params = ft_utils.get_parameter_from_yaml(
-                CONST.INSTALLER_TYPE, installer_params_yaml)
+                CONST.__getattribute__('INSTALLER_TYPE'),
+                installer_params_yaml)
         except ValueError as e:
             logger.debug('Printing deployment info is not supported for %s' %
-                         CONST.INSTALLER_TYPE)
+                         CONST.__getattribute__('INSTALLER_TYPE'))
             logger.debug(e)
         else:
             user = installer_params.get('user', None)
@@ -130,8 +137,8 @@ def get_deployment_handler():
             pkey = installer_params.get('pkey', None)
             try:
                 handler = factory.Factory.get_handler(
-                    installer=CONST.INSTALLER_TYPE,
-                    installer_ip=CONST.INSTALLER_IP,
+                    installer=CONST.__getattribute__('INSTALLER_TYPE'),
+                    installer_ip=CONST.__getattribute__('INSTALLER_IP'),
                     installer_user=user,
                     installer_pwd=password,
                     pkey_file=pkey)
@@ -144,51 +151,55 @@ def get_deployment_handler():
 def create_directories():
     print_separator()
     logger.info("Creating needed directories...")
-    if not os.path.exists(CONST.dir_functest_conf):
-        os.makedirs(CONST.dir_functest_conf)
-        logger.info("    %s created." % CONST.dir_functest_conf)
+    if not os.path.exists(CONST.__getattribute__('dir_functest_conf')):
+        os.makedirs(CONST.__getattribute__('dir_functest_conf'))
+        logger.info("    %s created." %
+                    CONST.__getattribute__('dir_functest_conf'))
     else:
         logger.debug("   %s already exists."
-                     % CONST.dir_functest_conf)
+                     % CONST.__getattribute__('dir_functest_conf'))
 
-    if not os.path.exists(CONST.dir_functest_data):
-        os.makedirs(CONST.dir_functest_data)
-        logger.info("    %s created." % CONST.dir_functest_data)
+    if not os.path.exists(CONST.__getattribute__('dir_functest_data')):
+        os.makedirs(CONST.__getattribute__('dir_functest_data'))
+        logger.info("    %s created." %
+                    CONST.__getattribute__('dir_functest_data'))
     else:
-        logger.debug("   %s already exists."
-                     % CONST.dir_functest_data)
+        logger.debug("   %s already exists." %
+                     CONST.__getattribute__('dir_functest_data'))
 
 
 def source_rc_file():
     print_separator()
     logger.info("Fetching RC file...")
 
-    if CONST.openstack_creds is None:
+    if CONST.__getattribute__('openstack_creds') is None:
         logger.warning("The environment variable 'creds' must be set and"
                        "pointing to the local RC file. Using default: "
                        "/home/opnfv/functest/conf/openstack.creds ...")
-        os.path.join(CONST.dir_functest_conf, 'openstack.creds')
+        os.path.join(
+            CONST.__getattribute__('dir_functest_conf'), 'openstack.creds')
 
-    if not os.path.isfile(CONST.openstack_creds):
+    if not os.path.isfile(CONST.__getattribute__('openstack_creds')):
         logger.info("RC file not provided. "
                     "Fetching it from the installer...")
-        if CONST.INSTALLER_IP is None:
-            logger.error("The env variable CI_INSTALLER_IP must be provided in"
+        if CONST.__getattribute__('INSTALLER_IP')is None:
+            logger.error("The env variable 'INSTALLER_IP' must be provided in"
                          " order to fetch the credentials from the installer.")
             raise Exception("Missing CI_INSTALLER_IP.")
-        if CONST.INSTALLER_TYPE not in opnfv_constants.INSTALLERS:
+        if (CONST.__getattribute__('INSTALLER_TYPE') not in
+                opnfv_constants.INSTALLERS):
             logger.error("Cannot fetch credentials. INSTALLER_TYPE=%s is "
                          "not a valid OPNFV installer. Available "
                          "installers are : %s." %
-                         (CONST.INSTALLER_TYPE,
+                         (CONST.__getattribute__('INSTALLER_TYPE'),
                           opnfv_constants.INSTALLERS))
             raise Exception("Wrong INSTALLER_TYPE.")
 
         cmd = ("/home/opnfv/repos/releng/utils/fetch_os_creds.sh "
                "-d %s -i %s -a %s"
-               % (CONST.openstack_creds,
-                  CONST.INSTALLER_TYPE,
-                  CONST.INSTALLER_IP))
+               % (CONST.__getattribute__('openstack_creds'),
+                  CONST.__getattribute__('INSTALLER_TYPE'),
+                  CONST.__getattribute__('INSTALLER_IP')))
         logger.debug("Executing command: %s" % cmd)
         p = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
         output = p.communicate()[0]
@@ -197,22 +208,23 @@ def source_rc_file():
             raise Exception("Failed to fetch credentials from installer.")
     else:
         logger.info("RC file provided in %s."
-                    % CONST.openstack_creds)
-        if os.path.getsize(CONST.openstack_creds) == 0:
-            raise Exception("The file %s is empty." % CONST.openstack_creds)
+                    % CONST.__getattribute__('openstack_creds'))
+        if os.path.getsize(CONST.__getattribute__('openstack_creds')) == 0:
+            raise Exception("The file %s is empty." %
+                            CONST.__getattribute__('openstack_creds'))
 
     logger.info("Sourcing the OpenStack RC file...")
-    os_utils.source_credentials(CONST.openstack_creds)
+    os_utils.source_credentials(CONST.__getattribute__('openstack_creds'))
     for key, value in os.environ.iteritems():
         if re.search("OS_", key):
             if key == 'OS_AUTH_URL':
-                CONST.OS_AUTH_URL = value
+                CONST.__setattr__('OS_AUTH_URL', value)
             elif key == 'OS_USERNAME':
-                CONST.OS_USERNAME = value
+                CONST.__setattr__('OS_USERNAME', value)
             elif key == 'OS_TENANT_NAME':
-                CONST.OS_TENANT_NAME = value
+                CONST.__setattr__('OS_TENANT_NAME', value)
             elif key == 'OS_PASSWORD':
-                CONST.OS_PASSWORD = value
+                CONST.__setattr__('OS_PASSWORD', value)
 
 
 def patch_config_file():
@@ -229,7 +241,7 @@ def patch_file(patch_file_path):
 
     updated = False
     for key in patch_file:
-        if key in CONST.DEPLOY_SCENARIO:
+        if key in CONST.__getattribute__('DEPLOY_SCENARIO'):
             new_functest_yaml = dict(ft_utils.merge_dicts(
                 ft_utils.get_functest_yaml(), patch_file[key]))
             updated = True
@@ -244,7 +256,8 @@ def patch_file(patch_file_path):
 def verify_deployment():
     print_separator()
     logger.info("Verifying OpenStack services...")
-    cmd = ("%s/functest/ci/check_os.sh" % CONST.dir_repo_functest)
+    cmd = ("%s/functest/ci/check_os.sh" %
+           CONST.__getattribute__('dir_repo_functest'))
 
     logger.debug("Executing command: %s" % cmd)
     p = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True)
@@ -275,7 +288,7 @@ def install_rally():
     cmd = "rally deployment destroy opnfv-rally"
     ft_utils.execute_command(cmd, error_msg=(
         "Deployment %s does not exist."
-        % CONST.rally_deployment_name),
+        % CONST.__getattribute__('rally_deployment_name')),
         verbose=False)
 
     rally_conf = os_utils.get_credentials_for_rally()
@@ -283,7 +296,7 @@ def install_rally():
         json.dump(rally_conf, fp)
     cmd = ("rally deployment create "
            "--file=rally_conf.json --name={0}"
-           .format(CONST.rally_deployment_name))
+           .format(CONST.__getattribute__('rally_deployment_name')))
     error_msg = "Problem while creating Rally deployment"
     ft_utils.execute_command_raise(cmd, error_msg=error_msg)
 
@@ -305,17 +318,18 @@ def install_rally():
 def install_tempest():
     logger.info("Installing tempest from existing repo...")
     cmd = ("rally verify list-verifiers | "
-           "grep '{0}' | wc -l".format(CONST.tempest_deployment_name))
+           "grep '{0}' | wc -l".format(
+               CONST.__getattribute__('tempest_deployment_name')))
     p = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True)
     while p.poll() is None:
         line = p.stdout.readline().rstrip()
         if str(line) == '0':
             logger.debug("Tempest %s does not exist" %
-                         CONST.tempest_deployment_name)
+                         CONST.__getattribute__('tempest_deployment_name'))
             cmd = ("rally verify create-verifier --source {0} "
                    "--name {1} --type tempest --system-wide"
-                   .format(CONST.dir_repo_tempest,
-                           CONST.tempest_deployment_name))
+                   .format(CONST.__getattribute__('dir_repo_tempest'),
+                           CONST.__getattribute__('tempest_deployment_name')))
             error_msg = "Problem while installing Tempest."
             ft_utils.execute_command_raise(cmd, error_msg=error_msg)
 
@@ -332,10 +346,10 @@ def create_flavor():
 
 def check_environment():
     msg_not_active = "The Functest environment is not installed."
-    if not os.path.isfile(CONST.env_active):
+    if not os.path.isfile(CONST.__getattribute__('env_active')):
         raise Exception(msg_not_active)
 
-    with open(CONST.env_active, "r") as env_file:
+    with open(CONST.__getattribute__('env_active'), "r") as env_file:
         s = env_file.read()
         if not re.search("1", s):
             raise Exception(msg_not_active)
@@ -365,7 +379,7 @@ def main(**kwargs):
             install_rally()
             install_tempest()
             create_flavor()
-            with open(CONST.env_active, "w") as env_file:
+            with open(CONST.__getattribute__('env_active'), "w") as env_file:
                 env_file.write("1")
             check_environment()
             print_deployment_info()
diff --git a/functest/ci/run_tests.py b/functest/ci/run_tests.py
index d13612603..073e09a7c 100755
--- a/functest/ci/run_tests.py
+++ b/functest/ci/run_tests.py
@@ -75,7 +75,7 @@ def print_separator(str, count=45):
 
 
 def source_rc_file():
-    rc_file = CONST.openstack_creds
+    rc_file = CONST.__getattribute__('openstack_creds')
     if not os.path.isfile(rc_file):
         raise Exception("RC file %s does not exist..." % rc_file)
     logger.debug("Sourcing the OpenStack RC file...")
@@ -83,13 +83,13 @@ def source_rc_file():
     for key, value in os.environ.iteritems():
         if re.search("OS_", key):
             if key == 'OS_AUTH_URL':
-                CONST.OS_AUTH_URL = value
+                CONST.__setattr__('OS_AUTH_URL', value)
             elif key == 'OS_USERNAME':
-                CONST.OS_USERNAME = value
+                CONST.__setattr__('OS_USERNAME', value)
             elif key == 'OS_TENANT_NAME':
-                CONST.OS_TENANT_NAME = value
+                CONST.__setattr__('OS_TENANT_NAME', value)
             elif key == 'OS_PASSWORD':
-                CONST.OS_PASSWORD = value
+                CONST.__setattr__('OS_PASSWORD', value)
 
 
 def generate_os_snapshot():
@@ -211,7 +211,8 @@ def run_all(tiers):
 
     for tier in tiers.get_tiers():
         if (len(tier.get_tests()) != 0 and
-                re.search(CONST.CI_LOOP, tier.get_ci_loop()) is not None):
+                re.search(CONST.__getattribute__('CI_LOOP'),
+                          tier.get_ci_loop()) is not None):
             tiers_to_run.append(tier)
             summary += ("\n    - %s:\n\t   %s"
                         % (tier.get_name(),
@@ -227,11 +228,10 @@ def run_all(tiers):
 
 def main(**kwargs):
 
-    CI_INSTALLER_TYPE = CONST.INSTALLER_TYPE
-    CI_SCENARIO = CONST.DEPLOY_SCENARIO
-
     file = CONST.functest_testcases_yaml
-    _tiers = tb.TierBuilder(CI_INSTALLER_TYPE, CI_SCENARIO, file)
+    _tiers = tb.TierBuilder(CONST.__getattribute__('INSTALLER_TYPE'),
+                            CONST.__getattribute__('DEPLOY_SCENARIO'),
+                            file)
 
     if kwargs['noclean']:
         GlobalVariables.CLEAN_FLAG = False
@@ -256,7 +256,8 @@ def main(**kwargs):
                 logger.error("Unknown test case or tier '%s', "
                              "or not supported by "
                              "the given scenario '%s'."
-                             % (kwargs['test'], CI_SCENARIO))
+                             % (kwargs['test'],
+                                CONST.__getattribute__('DEPLOY_SCENARIO')))
                 logger.debug("Available tiers are:\n\n%s"
                              % _tiers)
                 return Result.EX_ERROR
diff --git a/functest/core/vnf_base.py b/functest/core/vnf_base.py
index 90bc80b38..bc5bf9a71 100644
--- a/functest/core/vnf_base.py
+++ b/functest/core/vnf_base.py
@@ -26,12 +26,12 @@ class VnfOnBoardingBase(base.TestCase):
         self.repo = kwargs.get('repo', '')
         self.cmd = kwargs.get('cmd', '')
         self.details = {}
-        self.result_dir = CONST.dir_results
+        self.result_dir = CONST.__getattribute__('dir_results')
         self.details_step_mapping = dict(
-                    deploy_orchestrator='orchestrator',
-                    deploy_vnf='vnf',
-                    test_vnf='test_vnf',
-                    prepare='prepare_env')
+            deploy_orchestrator='orchestrator',
+            deploy_vnf='vnf',
+            test_vnf='test_vnf',
+            prepare='prepare_env')
         self.details['prepare_env'] = {}
         self.details['orchestrator'] = {}
         self.details['vnf'] = {}
@@ -127,7 +127,7 @@ class VnfOnBoardingBase(base.TestCase):
                                              self.creds['username'])
         if not admin_user_id:
             self.step_failure("Failed to get id of {0}".format(
-                                                self.creds['username']))
+                self.creds['username']))
 
         tenant_id = os_utils.get_tenant_id(self.keystone_client,
                                            self.tenant_name)
@@ -137,7 +137,7 @@ class VnfOnBoardingBase(base.TestCase):
                                                self.tenant_description)
             if not tenant_id:
                 self.step_failure("Failed to get or create {0} tenant".format(
-                                                        self.tenant_name))
+                    self.tenant_name))
             roles_name = ["admin", "Admin"]
             role_id = ''
             for role_name in roles_name:
@@ -147,12 +147,12 @@ class VnfOnBoardingBase(base.TestCase):
 
             if not role_id:
                 self.step_failure("Failed to get id for {0} role".format(
-                                                            role_name))
+                    role_name))
 
             if not os_utils.add_role_user(self.keystone_client, admin_user_id,
                                           role_id, tenant_id):
                 self.step_failure("Failed to add {0} on tenant".format(
-                                                self.creds['username']))
+                    self.creds['username']))
 
         user_id = os_utils.get_or_create_user(self.keystone_client,
                                               self.tenant_name,
diff --git a/functest/tests/unit/ci/test_generate_report.py b/functest/tests/unit/ci/test_generate_report.py
index 2225586f2..13361c1d1 100644
--- a/functest/tests/unit/ci/test_generate_report.py
+++ b/functest/tests/unit/ci/test_generate_report.py
@@ -29,7 +29,7 @@ class GenerateReportTesting(unittest.TestCase):
                 side_effect=urllib2.URLError('no host given'))
     def test_get_results_from_db_fail(self, mock_method):
         url = "%s/results?build_tag=%s" % (ft_utils.get_db_url(),
-                                           CONST.BUILD_TAG)
+                                           CONST.__getattribute__('BUILD_TAG'))
         self.assertIsNone(gen_report.get_results_from_db())
         mock_method.assert_called_once_with(url)
 
@@ -37,7 +37,7 @@ class GenerateReportTesting(unittest.TestCase):
                 return_value={'results': []})
     def test_get_results_from_db_success(self, mock_method):
         url = "%s/results?build_tag=%s" % (ft_utils.get_db_url(),
-                                           CONST.BUILD_TAG)
+                                           CONST.__getattribute__('BUILD_TAG'))
         self.assertEqual(gen_report.get_results_from_db(), None)
         mock_method.assert_called_once_with(url)
 
@@ -45,7 +45,7 @@ class GenerateReportTesting(unittest.TestCase):
         self.assertIsInstance(gen_report.get_data({'result': ''}, ''), dict)
 
     def test_print_line_with_ci_run(self):
-        CONST.IS_CI_RUN = True
+        CONST.__setattr__('IS_CI_RUN', True)
         w1 = 'test_print_line'
         test_str = ("| %s| %s| %s| %s| %s|\n"
                     % (w1.ljust(gen_report.COL_1_LEN - 1),
@@ -56,7 +56,7 @@ class GenerateReportTesting(unittest.TestCase):
         self.assertEqual(gen_report.print_line(w1), test_str)
 
     def test_print_line_without_ci_run(self):
-        CONST.IS_CI_RUN = False
+        CONST.__setattr__('IS_CI_RUN', False)
         w1 = 'test_print_line'
         test_str = ("| %s| %s| %s| %s|\n"
                     % (w1.ljust(gen_report.COL_1_LEN - 1),
@@ -66,7 +66,7 @@ class GenerateReportTesting(unittest.TestCase):
         self.assertEqual(gen_report.print_line(w1), test_str)
 
     def test_print_line_no_column_with_ci_run(self):
-        CONST.IS_CI_RUN = True
+        CONST.__setattr__('IS_CI_RUN', True)
         TOTAL_LEN = gen_report.COL_1_LEN + gen_report.COL_2_LEN
         TOTAL_LEN += gen_report.COL_3_LEN + gen_report.COL_4_LEN + 2
         TOTAL_LEN += gen_report.COL_5_LEN + 1
@@ -74,14 +74,14 @@ class GenerateReportTesting(unittest.TestCase):
         self.assertEqual(gen_report.print_line_no_columns('test'), test_str)
 
     def test_print_line_no_column_without_ci_run(self):
-        CONST.IS_CI_RUN = False
+        CONST.__setattr__('IS_CI_RUN', False)
         TOTAL_LEN = gen_report.COL_1_LEN + gen_report.COL_2_LEN
         TOTAL_LEN += gen_report.COL_3_LEN + gen_report.COL_4_LEN + 2
         test_str = ("| %s|\n" % 'test'.ljust(TOTAL_LEN))
         self.assertEqual(gen_report.print_line_no_columns('test'), test_str)
 
     def test_print_separator_with_ci_run(self):
-        CONST.IS_CI_RUN = True
+        CONST.__setattr__('IS_CI_RUN', True)
         test_str = ("+" + "=" * gen_report.COL_1_LEN +
                     "+" + "=" * gen_report.COL_2_LEN +
                     "+" + "=" * gen_report.COL_3_LEN +
@@ -91,7 +91,7 @@ class GenerateReportTesting(unittest.TestCase):
         self.assertEqual(gen_report.print_separator(), test_str)
 
     def test_print_separator_without_ci_run(self):
-        CONST.IS_CI_RUN = False
+        CONST.__setattr__('IS_CI_RUN', False)
         test_str = ("+" + "=" * gen_report.COL_1_LEN +
                     "+" + "=" * gen_report.COL_2_LEN +
                     "+" + "=" * gen_report.COL_3_LEN +
@@ -101,25 +101,25 @@ class GenerateReportTesting(unittest.TestCase):
 
     @mock.patch('functest.ci.generate_report.logger.info')
     def test_main_with_ci_run(self, mock_method):
-        CONST.IS_CI_RUN = True
+        CONST.__setattr__('IS_CI_RUN', True)
         gen_report.main()
         mock_method.assert_called_once_with(test_utils.SubstrMatch('URL'))
 
     @mock.patch('functest.ci.generate_report.logger.info')
     def test_main_with_ci_loop(self, mock_method):
-        CONST.CI_LOOP = 'daily'
+        CONST.__setattr__('CI_LOOP', 'daily')
         gen_report.main()
         mock_method.assert_called_once_with(test_utils.SubstrMatch('CI LOOP'))
 
     @mock.patch('functest.ci.generate_report.logger.info')
     def test_main_with_scenario(self, mock_method):
-        CONST.DEPLOY_SCENARIO = 'test_scenario'
+        CONST.__setattr__('DEPLOY_SCENARIO', 'test_scenario')
         gen_report.main()
         mock_method.assert_called_once_with(test_utils.SubstrMatch('SCENARIO'))
 
     @mock.patch('functest.ci.generate_report.logger.info')
     def test_main_with_build_tag(self, mock_method):
-        CONST.BUILD_TAG = 'test_build_tag'
+        CONST.__setattr__('BUILD_TAG', 'test_build_tag')
         gen_report.main()
         mock_method.assert_called_once_with(test_utils.
                                             SubstrMatch('BUILD TAG'))
diff --git a/functest/tests/unit/ci/test_prepare_env.py b/functest/tests/unit/ci/test_prepare_env.py
index 714dd13c3..39a0825c3 100644
--- a/functest/tests/unit/ci/test_prepare_env.py
+++ b/functest/tests/unit/ci/test_prepare_env.py
@@ -33,7 +33,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_missing_inst_type(self, mock_logger_warn,
                                                    mock_logger_info):
-        CONST.INSTALLER_TYPE = None
+        CONST.__setattr__('INSTALLER_TYPE', None)
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -44,7 +44,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_missing_inst_ip(self, mock_logger_warn,
                                                  mock_logger_info):
-        CONST.INSTALLER_IP = None
+        CONST.__setattr__('INSTALLER_IP', None)
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -61,7 +61,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_with_inst_ip(self, mock_logger_warn,
                                               mock_logger_info):
-        CONST.INSTALLER_IP = mock.Mock()
+        CONST.__setattr__('INSTALLER_IP', mock.Mock())
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -72,7 +72,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_missing_scenario(self, mock_logger_warn,
                                                   mock_logger_info):
-        CONST.DEPLOY_SCENARIO = None
+        CONST.__setattr__('DEPLOY_SCENARIO', None)
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -84,7 +84,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_with_scenario(self, mock_logger_warn,
                                                mock_logger_info):
-        CONST.DEPLOY_SCENARIO = 'test_scenario'
+        CONST.__setattr__('DEPLOY_SCENARIO', 'test_scenario')
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -95,7 +95,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_with_ci_debug(self, mock_logger_warn,
                                                mock_logger_info):
-        CONST.CI_DEBUG = mock.Mock()
+        CONST.__setattr__('CI_DEBUG', mock.Mock())
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -106,7 +106,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_with_node(self, mock_logger_warn,
                                            mock_logger_info):
-        CONST.NODE_NAME = mock.Mock()
+        CONST.__setattr__('NODE_NAME', mock.Mock())
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -117,7 +117,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_with_build_tag(self, mock_logger_warn,
                                                 mock_logger_info):
-        CONST.BUILD_TAG = mock.Mock()
+        CONST.__setattr__('BUILD_TAG', mock.Mock())
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -129,7 +129,7 @@ class PrepareEnvTesting(unittest.TestCase):
     @mock.patch('functest.ci.prepare_env.logger.warning')
     def test_check_env_variables_with_is_ci_run(self, mock_logger_warn,
                                                 mock_logger_info):
-        CONST.IS_CI_RUN = mock.Mock()
+        CONST.__setattr__('IS_CI_RUN', mock.Mock())
         prepare_env.check_env_variables()
         mock_logger_info.assert_any_call("Checking environment variables"
                                          "...")
@@ -140,11 +140,11 @@ class PrepareEnvTesting(unittest.TestCase):
     def test_get_deployment_handler_missing_const_vars(self):
         with mock.patch('functest.ci.prepare_env.'
                         'factory.Factory.get_handler') as m:
-            CONST.INSTALLER_IP = None
+            CONST.__setattr__('INSTALLER_IP', None)
             prepare_env.get_deployment_handler()
             self.assertFalse(m.called)
 
-            CONST.INSTALLER_TYPE = None
+            CONST.__setattr__('INSTALLER_TYPE', None)
             prepare_env.get_deployment_handler()
             self.assertFalse(m.called)
 
@@ -156,8 +156,8 @@ class PrepareEnvTesting(unittest.TestCase):
             mock.patch('functest.ci.prepare_env.'
                        'ft_utils.get_parameter_from_yaml',
                        side_effect=ValueError):
-            CONST.INSTALLER_IP = 'test_ip'
-            CONST.INSTALLER_TYPE = 'test_inst_type'
+            CONST.__setattr__('INSTALLER_IP', 'test_ip')
+            CONST.__setattr__('INSTALLER_TYPE', 'test_inst_type')
             opnfv_constants.INSTALLERS = ['test_inst_type']
             prepare_env.get_deployment_handler()
             msg = ('Printing deployment info is not supported for '
@@ -172,8 +172,8 @@ class PrepareEnvTesting(unittest.TestCase):
                         side_effect=Exception), \
             mock.patch('functest.ci.prepare_env.'
                        'ft_utils.get_parameter_from_yaml'):
-            CONST.INSTALLER_IP = 'test_ip'
-            CONST.INSTALLER_TYPE = 'test_inst_type'
+            CONST.__setattr__('INSTALLER_IP', 'test_ip')
+            CONST.__setattr__('INSTALLER_TYPE', 'test_inst_type')
             opnfv_constants.INSTALLERS = ['test_inst_type']
             prepare_env.get_deployment_handler()
             self.assertTrue(mock_debug.called)
@@ -188,12 +188,16 @@ class PrepareEnvTesting(unittest.TestCase):
                 as mock_method:
             prepare_env.create_directories()
             mock_logger_info.assert_any_call("Creating needed directories...")
-            mock_method.assert_any_call(CONST.dir_functest_conf)
-            mock_method.assert_any_call(CONST.dir_functest_data)
+            mock_method.assert_any_call(
+                CONST.__getattribute__('dir_functest_conf'))
+            mock_method.assert_any_call(
+                CONST.__getattribute__('dir_functest_data'))
             mock_logger_info.assert_any_call("    %s created." %
-                                             CONST.dir_functest_conf)
+                                             CONST.__getattribute__(
+                                                 'dir_functest_conf'))
             mock_logger_info.assert_any_call("    %s created." %
-                                             CONST.dir_functest_data)
+                                             CONST.__getattribute__(
+                                                 'dir_functest_data'))
 
     @mock.patch('functest.ci.prepare_env.logger.info')
     @mock.patch('functest.ci.prepare_env.logger.debug')
@@ -204,9 +208,11 @@ class PrepareEnvTesting(unittest.TestCase):
             prepare_env.create_directories()
             mock_logger_info.assert_any_call("Creating needed directories...")
             mock_logger_debug.assert_any_call("   %s already exists." %
-                                              CONST.dir_functest_conf)
+                                              CONST.__getattribute__(
+                                                  'dir_functest_conf'))
             mock_logger_debug.assert_any_call("   %s already exists." %
-                                              CONST.dir_functest_data)
+                                              CONST.__getattribute__(
+                                                  'dir_functest_data'))
 
     def _get_env_cred_dict(self, os_prefix=''):
         return {'OS_USERNAME': os_prefix + 'username',
@@ -230,24 +236,24 @@ class PrepareEnvTesting(unittest.TestCase):
                 mock.patch('functest.ci.prepare_env.os.path.getsize',
                            return_value=0), \
                 self.assertRaises(Exception):
-            CONST.openstack_creds = 'test_creds'
+            CONST.__setattr__('openstack_creds', 'test_creds')
             prepare_env.source_rc_file()
 
     def test_source_rc_missing_installer_ip(self):
         with mock.patch('functest.ci.prepare_env.os.path.isfile',
                         return_value=False), \
                 self.assertRaises(Exception):
-            CONST.INSTALLER_IP = None
-            CONST.openstack_creds = 'test_creds'
+            CONST.__setattr__('INSTALLER_IP', None)
+            CONST.__setattr__('openstack_creds', 'test_creds')
             prepare_env.source_rc_file()
 
     def test_source_rc_missing_installer_type(self):
         with mock.patch('functest.ci.prepare_env.os.path.isfile',
                         return_value=False), \
                 self.assertRaises(Exception):
-            CONST.INSTALLER_IP = 'test_ip'
-            CONST.openstack_creds = 'test_creds'
-            CONST.INSTALLER_TYPE = 'test_type'
+            CONST.__setattr__('INSTALLER_IP', 'test_ip')
+            CONST.__setattr__('openstack_creds', 'test_creds')
+            CONST.__setattr__('INSTALLER_TYPE', 'test_type')
             opnfv_constants.INSTALLERS = []
             prepare_env.source_rc_file()
 
@@ -259,9 +265,9 @@ class PrepareEnvTesting(unittest.TestCase):
                 mock.patch('functest.ci.prepare_env.subprocess.Popen') \
                 as mock_subproc_popen, \
                 self.assertRaises(Exception):
-            CONST.openstack_creds = 'test_creds'
-            CONST.INSTALLER_IP = None
-            CONST.INSTALLER_TYPE = 'test_type'
+            CONST.__setattr__('openstack_creds', 'test_creds')
+            CONST.__setattr__('INSTALLER_IP', None)
+            CONST.__setattr__('INSTALLER_TYPE', 'test_type')
             opnfv_constants.INSTALLERS = ['test_type']
 
             process_mock = mock.Mock()
@@ -281,7 +287,7 @@ class PrepareEnvTesting(unittest.TestCase):
                        return_value={'tkey1': 'tvalue1'}), \
             mock.patch('functest.ci.prepare_env.os.remove') as m, \
                 mock.patch('functest.ci.prepare_env.yaml.dump'):
-            CONST.DEPLOY_SCENARIO = 'test_scenario'
+            CONST.__setattr__('DEPLOY_SCENARIO', 'test_scenario')
             prepare_env.patch_file('test_file')
             self.assertTrue(m.called)
 
@@ -321,12 +327,12 @@ class PrepareEnvTesting(unittest.TestCase):
 
         cmd = "rally deployment destroy opnfv-rally"
         error_msg = "Deployment %s does not exist." % \
-                    CONST.rally_deployment_name
+                    CONST.__getattribute__('rally_deployment_name')
         mock_logger_info.assert_any_call("Creating Rally environment...")
         mock_exec.assert_any_call(cmd, error_msg=error_msg, verbose=False)
 
         cmd = "rally deployment create --file=rally_conf.json --name="
-        cmd += CONST.rally_deployment_name
+        cmd += CONST.__getattribute__('rally_deployment_name')
         error_msg = "Problem while creating Rally deployment"
         mock_exec_raise.assert_any_call(cmd, error_msg=error_msg)
 
@@ -352,7 +358,7 @@ class PrepareEnvTesting(unittest.TestCase):
                  'stdout.readline.return_value': '0'}
         mock_popen.configure_mock(**attrs)
 
-        CONST.tempest_deployment_name = 'test_dep_name'
+        CONST.__setattr__('tempest_deployment_name', 'test_dep_name')
         with mock.patch('functest.ci.prepare_env.'
                         'ft_utils.execute_command_raise',
                         side_effect=Exception), \
@@ -379,7 +385,7 @@ class PrepareEnvTesting(unittest.TestCase):
         with mock.patch('functest.ci.prepare_env.os.path.isfile',
                         return_value=False), \
                 self.assertRaises(Exception):
-                prepare_env.check_environment()
+            prepare_env.check_environment()
 
     @mock.patch('functest.ci.prepare_env.sys.exit')
     @mock.patch('functest.ci.prepare_env.logger.error')
@@ -431,7 +437,8 @@ class PrepareEnvTesting(unittest.TestCase):
             self.assertTrue(mock_install_rally.called)
             self.assertTrue(mock_install_temp.called)
             self.assertTrue(mock_create_flavor.called)
-            m.assert_called_once_with(CONST.env_active, "w")
+            m.assert_called_once_with(
+                CONST.__getattribute__('env_active'), "w")
             self.assertTrue(mock_check_env.called)
             self.assertTrue(mock_print_info.called)
 
diff --git a/functest/tests/unit/ci/test_run_tests.py b/functest/tests/unit/ci/test_run_tests.py
index 7d02b1af1..ef08282aa 100644
--- a/functest/tests/unit/ci/test_run_tests.py
+++ b/functest/tests/unit/ci/test_run_tests.py
@@ -62,13 +62,13 @@ class RunTestsTesting(unittest.TestCase):
 
     @mock.patch('functest.ci.run_tests.os_snapshot.main')
     def test_generate_os_snapshot(self, mock_os_snap):
-            run_tests.generate_os_snapshot()
-            self.assertTrue(mock_os_snap.called)
+        run_tests.generate_os_snapshot()
+        self.assertTrue(mock_os_snap.called)
 
     @mock.patch('functest.ci.run_tests.os_clean.main')
     def test_cleanup(self, mock_os_clean):
-            run_tests.cleanup()
-            self.assertTrue(mock_os_clean.called)
+        run_tests.cleanup()
+        self.assertTrue(mock_os_clean.called)
 
     def test_update_test_info(self):
         run_tests.GlobalVariables.EXECUTED_TEST_CASES = [self.test]
@@ -179,7 +179,7 @@ class RunTestsTesting(unittest.TestCase):
         with mock.patch('functest.ci.run_tests.run_tier') as mock_method, \
             mock.patch('functest.ci.run_tests.generate_report.init'), \
                 mock.patch('functest.ci.run_tests.generate_report.main'):
-            CONST.CI_LOOP = 'test_ci_loop'
+            CONST.__setattr__('CI_LOOP', 'test_ci_loop')
             run_tests.run_all(self.tiers)
             mock_method.assert_any_call(self.tier)
             self.assertTrue(mock_logger_info.called)
@@ -188,7 +188,7 @@ class RunTestsTesting(unittest.TestCase):
     def test_run_all__missing_tier(self, mock_logger_info):
         with mock.patch('functest.ci.run_tests.generate_report.init'), \
                 mock.patch('functest.ci.run_tests.generate_report.main'):
-            CONST.CI_LOOP = 'loop_re_not_available'
+            CONST.__setattr__('CI_LOOP', 'loop_re_not_available')
             run_tests.run_all(self.tiers)
             self.assertTrue(mock_logger_info.called)
 
@@ -268,5 +268,6 @@ class RunTestsTesting(unittest.TestCase):
                              run_tests.Result.EX_ERROR)
             self.assertTrue(m.called)
 
+
 if __name__ == "__main__":
     unittest.main(verbosity=2)