From 026269dcc157f710ae2a2f9f335c7446dee80eea Mon Sep 17 00:00:00 2001
From: Martin Kopec <mkopec@redhat.com>
Date: Tue, 23 Jan 2018 12:41:23 +0000
Subject: [PATCH] Decouple TempestConf class

* config_tempest.py was renamed to main.py - entrypoint for console-script
  (discover-tempest-config) was changed too
* TempestConf class was decoupled from main.py and moved to tempest_conf.py
  file. Imports of related tests were edited and the order of imports in each
  file was changed so that other dependencies are first followed by a blank
  space and then local dependencies are listed.
* tests related to TempestConf class were moved to test_tempest_conf.py file

Change-Id: Idb235b969ba3c1e320aa3efa7fe77b5c59f4ffc6
---
 config_tempest/{config_tempest.py => main.py} |  88 +-----------
 config_tempest/tempest_conf.py                | 127 ++++++++++++++++++
 config_tempest/tests/base.py                  |  10 +-
 config_tempest/tests/test_config_tempest.py   | 122 ++---------------
 .../tests/test_config_tempest_image.py        |  29 ++--
 .../tests/test_config_tempest_network.py      |   7 +-
 .../tests/test_config_tempest_user.py         |  40 +++---
 config_tempest/tests/test_tempest_conf.py     | 112 +++++++++++++++
 setup.cfg                                     |   2 +-
 9 files changed, 298 insertions(+), 239 deletions(-)
 rename config_tempest/{config_tempest.py => main.py} (92%)
 create mode 100644 config_tempest/tempest_conf.py
 create mode 100644 config_tempest/tests/test_tempest_conf.py

diff --git a/config_tempest/config_tempest.py b/config_tempest/main.py
similarity index 92%
rename from config_tempest/config_tempest.py
rename to config_tempest/main.py
index 39eedd9c..c3b31eaa 100755
--- a/config_tempest/config_tempest.py
+++ b/config_tempest/main.py
@@ -43,7 +43,6 @@ import logging
 import os
 import shutil
 import sys
-import tempest.config
 import urllib2
 
 import os_client_config
@@ -66,6 +65,7 @@ from tempest.lib.services.identity.v3 import users_client as users_v3_client
 from tempest.lib.services.image.v2 import images_client
 from tempest.lib.services.network import networks_client
 from tempest.lib.services.volume.v2 import services_client
+import tempest_conf
 
 LOG = logging.getLogger(__name__)
 
@@ -595,88 +595,6 @@ class ClientManager(object):
             conf.set('identity', 'admin_tenant_id', tenant_id)
 
 
-class TempestConf(ConfigParser.SafeConfigParser):
-    # causes the config parser to preserve case of the options
-    optionxform = str
-
-    # set of pairs `(section, key)` which have a higher priority (are
-    # user-defined) and will usually not be overwritten by `set()`
-    priority_sectionkeys = set()
-
-    CONF = tempest.config.TempestConfigPrivate(parse_conf=False)
-
-    def get_bool_value(self, value):
-        strval = str(value).lower()
-        if strval == 'true':
-            return True
-        elif strval == 'false':
-            return False
-        else:
-            raise ValueError("'%s' is not a boolean" % value)
-
-    def get_defaulted(self, section, key):
-        if self.has_option(section, key):
-            return self.get(section, key)
-        else:
-            return self.CONF.get(section).get(key)
-
-    def set(self, section, key, value, priority=False):
-        """Set value in configuration, similar to `SafeConfigParser.set`
-
-        Creates non-existent sections. Keeps track of options which were
-        specified by the user and should not be normally overwritten.
-
-        :param priority: if True, always over-write the value. If False, don't
-            over-write an existing value if it was written before with a
-            priority (i.e. if it was specified by the user)
-        :returns: True if the value was written, False if not (because of
-            priority)
-        """
-        if not self.has_section(section) and section.lower() != "default":
-            self.add_section(section)
-        if not priority and (section, key) in self.priority_sectionkeys:
-            LOG.debug("Option '[%s] %s = %s' was defined by user, NOT"
-                      " overwriting into value '%s'", section, key,
-                      self.get(section, key), value)
-            return False
-        if priority:
-            self.priority_sectionkeys.add((section, key))
-        LOG.debug("Setting [%s] %s = %s", section, key, value)
-        ConfigParser.SafeConfigParser.set(self, section, key, value)
-        return True
-
-    def remove_values(self, args):
-        """Remove values from configuration file specified in arguments.
-
-        :args - arguments object
-        """
-        for key_path in args.remove:
-            section, key = key_path.split('.')
-            try:
-                conf_values = self.get(section, key).split(',')
-                remove = args.remove[key_path]
-                if len(remove) == 0:
-                    # delete all values in section.key
-                    self.remove_option(section, key)
-                elif len(conf_values) == 1:
-                    # make sure only the value specified by user
-                    # will be deleted if in the key is other value
-                    # than expected, ignore it
-                    if conf_values[0] in args.remove[key_path]:
-                        self.remove_option(section, key)
-                else:
-                    # exclude all unwanted values from the list
-                    # and preserve the original order of items
-                    conf_values = [v for v in conf_values if v not in remove]
-                    self.set(section, key, ",".join(conf_values))
-            except ConfigParser.NoOptionError:
-                # only inform a user, option specified by him doesn't exist
-                LOG.error(sys.exc_info()[1])
-            except ConfigParser.NoSectionError:
-                # only inform a user, section specified by him doesn't exist
-                LOG.error(sys.exc_info()[1])
-
-
 def create_tempest_users(tenants_client, roles_client, users_client, conf,
                          services):
     """Create users necessary for Tempest if they don't exist already."""
@@ -1114,7 +1032,7 @@ def main():
     args = parse_arguments()
     set_logging(args.debug, args.verbose)
 
-    conf = TempestConf()
+    conf = tempest_conf.TempestConf()
     cloud_creds = args.config.get('auth')
     set_options(conf, args.deployer_input, args.non_admin,
                 args.overrides, args.test_accounts, cloud_creds)
@@ -1164,7 +1082,7 @@ def main():
     # remove all unwanted values if were specified
     if args.remove != {}:
         LOG.info("Removing configuration: %s", str(args.remove))
-        conf.remove_values(args)
+        conf.remove_values(args.remove)
     LOG.info("Creating configuration file %s", os.path.abspath(args.out))
     with open(args.out, 'w') as f:
         conf.write(f)
diff --git a/config_tempest/tempest_conf.py b/config_tempest/tempest_conf.py
new file mode 100644
index 00000000..900240b6
--- /dev/null
+++ b/config_tempest/tempest_conf.py
@@ -0,0 +1,127 @@
+# Copyright 2018 Red Hat, Inc.
+# All Rights Reserved.
+#
+# 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.
+
+import ConfigParser
+import logging
+import sys
+
+import tempest.config
+
+LOG = logging.getLogger(__name__)
+
+
+class TempestConf(ConfigParser.SafeConfigParser):
+    # causes the config parser to preserve case of the options
+    optionxform = str
+
+    # set of pairs `(section, key)` which have a higher priority (are
+    # user-defined) and will usually not be overwritten by `set()`
+    priority_sectionkeys = set()
+
+    CONF = tempest.config.TempestConfigPrivate(parse_conf=False)
+
+    def get_bool_value(self, value):
+        """Returns boolean value of the string value given.
+
+        :param value: True/False
+        :type value: String
+        :returns: Boolean value of the string value given
+        :rtype: Boolean
+        """
+        strval = str(value).lower()
+        if strval == 'true':
+            return True
+        elif strval == 'false':
+            return False
+        else:
+            raise ValueError("'%s' is not a boolean" % value)
+
+    def get_defaulted(self, section, key):
+        """Returns default value for the section.key pair.
+
+        :param section: a section in a tempest.conf file
+        :type section: String
+        :param key: a key in a section in a tempest.conf file
+        :type key: String
+        :returns: default value for the section.key pair
+        :rtype: String
+        """
+        if self.has_option(section, key):
+            return self.get(section, key)
+        else:
+            return self.CONF.get(section).get(key)
+
+    def set(self, section, key, value, priority=False):
+        """Set value in configuration, similar to `SafeConfigParser.set`
+
+        Creates non-existent sections. Keeps track of options which were
+        specified by the user and should not be normally overwritten.
+
+        :param section: a section in a tempest.conf file
+        :type section: String
+        :param key: a key in a section in a tempest.conf file
+        :type key: String
+        :param priority: if True, always over-write the value. If False, don't
+            over-write an existing value if it was written before with a
+            priority (i.e. if it was specified by the user)
+        :type priority: Boolean
+        :returns: True if the value was written, False if not (because of
+            priority)
+        :rtype: Boolean
+        """
+        if not self.has_section(section) and section.lower() != "default":
+            self.add_section(section)
+        if not priority and (section, key) in self.priority_sectionkeys:
+            LOG.debug("Option '[%s] %s = %s' was defined by user, NOT"
+                      " overwriting into value '%s'", section, key,
+                      self.get(section, key), value)
+            return False
+        if priority:
+            self.priority_sectionkeys.add((section, key))
+        LOG.debug("Setting [%s] %s = %s", section, key, value)
+        ConfigParser.SafeConfigParser.set(self, section, key, value)
+        return True
+
+    def remove_values(self, to_remove):
+        """Remove values from configuration file specified in arguments.
+
+        :param to_remove: {'section.key': [values_to_be_removed], ...}
+        :type to_remove: dict
+        """
+        for key_path in to_remove:
+            section, key = key_path.split('.')
+            try:
+                conf_values = self.get(section, key).split(',')
+                remove = to_remove[key_path]
+                if len(remove) == 0:
+                    # delete all values in section.key
+                    self.remove_option(section, key)
+                elif len(conf_values) == 1:
+                    # make sure only the value specified by user
+                    # will be deleted if in the key is other value
+                    # than expected, ignore it
+                    if conf_values[0] in to_remove[key_path]:
+                        self.remove_option(section, key)
+                else:
+                    # exclude all unwanted values from the list
+                    # and preserve the original order of items
+                    conf_values = [v for v in conf_values if v not in remove]
+                    self.set(section, key, ",".join(conf_values))
+            except ConfigParser.NoOptionError:
+                # only inform a user, option specified by him doesn't exist
+                LOG.error(sys.exc_info()[1])
+            except ConfigParser.NoSectionError:
+                # only inform a user, section specified by him doesn't exist
+                LOG.error(sys.exc_info()[1])
diff --git a/config_tempest/tests/base.py b/config_tempest/tests/base.py
index b1397fea..12d43da9 100644
--- a/config_tempest/tests/base.py
+++ b/config_tempest/tests/base.py
@@ -15,13 +15,15 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from config_tempest import api_discovery as api
-from config_tempest import config_tempest as tool
 from fixtures import MonkeyPatch
 import json
 import mock
 from oslotest import base
 
+from config_tempest import api_discovery as api
+from config_tempest import main as tool
+from config_tempest import tempest_conf
+
 
 class BaseConfigTempestTest(base.BaseTestCase):
 
@@ -29,7 +31,7 @@ class BaseConfigTempestTest(base.BaseTestCase):
 
     def _get_conf(self, V2, V3):
         """Creates fake conf for testing purposes"""
-        conf = tool.TempestConf()
+        conf = tempest_conf.TempestConf()
         uri = "http://172.16.52.151:5000/"
         conf.set("identity", "username", "demo")
         conf.set("identity", "password", "secret")
@@ -46,7 +48,7 @@ class BaseConfigTempestTest(base.BaseTestCase):
 
     def _get_alt_conf(self, V2, V3):
         """Contains newer params in place of the deprecated params"""
-        conf = tool.TempestConf()
+        conf = tempest_conf.TempestConf()
         uri = "http://172.16.52.151:5000/"
         conf.set("identity", "username", "demo")
         conf.set("identity", "password", "secret")
diff --git a/config_tempest/tests/test_config_tempest.py b/config_tempest/tests/test_config_tempest.py
index c1635ebe..6f1c364a 100644
--- a/config_tempest/tests/test_config_tempest.py
+++ b/config_tempest/tests/test_config_tempest.py
@@ -15,13 +15,14 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from argparse import Namespace
-from config_tempest import config_tempest as tool
-from config_tempest.tests.base import BaseConfigTempestTest
 from fixtures import MonkeyPatch
 import logging
 import mock
 
+from config_tempest import main as tool
+from config_tempest import tempest_conf
+from config_tempest.tests.base import BaseConfigTempestTest
+
 # disable logging when running unit tests
 logging.disable(logging.CRITICAL)
 
@@ -35,7 +36,7 @@ class TestClientManager(BaseConfigTempestTest):
 
     def test_get_credentials_v2(self):
         mock_function = mock.Mock()
-        function2mock = 'config_tempest.config_tempest.auth.get_credentials'
+        function2mock = 'config_tempest.main.auth.get_credentials'
         self.useFixture(MonkeyPatch(function2mock, mock_function))
         self.client.get_credentials(self.conf, "name", "Tname", "pass")
         mock_function.assert_called_with(
@@ -46,7 +47,7 @@ class TestClientManager(BaseConfigTempestTest):
 
     def test_get_credentials_v3(self):
         mock_function = mock.Mock()
-        function2mock = 'config_tempest.config_tempest.auth.get_credentials'
+        function2mock = 'config_tempest.main.auth.get_credentials'
         self.useFixture(MonkeyPatch(function2mock, mock_function))
         self.client.get_credentials(self.conf, "name", "project_name",
                                     "pass", identity_version='v3')
@@ -63,7 +64,7 @@ class TestClientManager(BaseConfigTempestTest):
         # check if method returns correct method - KeystoneV2AuthProvider
         mock_function = mock.Mock()
         # mock V2Provider, if other provider is called, it fails
-        func2mock = 'config_tempest.config_tempest.auth.KeystoneV2AuthProvider'
+        func2mock = 'config_tempest.main.auth.KeystoneV2AuthProvider'
         self.useFixture(MonkeyPatch(func2mock, mock_function))
         resp = self.client.get_auth_provider(self.conf, "")
         self.assertEqual(resp, mock_function())
@@ -76,11 +77,11 @@ class TestClientManager(BaseConfigTempestTest):
         # check if method returns KeystoneV3AuthProvider
         # make isinstance return True
         mockIsInstance = mock.Mock(return_value=True)
-        self.useFixture(MonkeyPatch('config_tempest.config_tempest.isinstance',
+        self.useFixture(MonkeyPatch('config_tempest.main.isinstance',
                                     mockIsInstance))
         mock_function = mock.Mock()
         # mock V3Provider, if other provider is called, it fails
-        func2mock = 'config_tempest.config_tempest.auth.KeystoneV3AuthProvider'
+        func2mock = 'config_tempest.main.auth.KeystoneV3AuthProvider'
         self.useFixture(MonkeyPatch(func2mock, mock_function))
         resp = self.client.get_auth_provider(self.conf, "")
         self.assertEqual(resp, mock_function())
@@ -100,7 +101,7 @@ class TestClientManager(BaseConfigTempestTest):
 
     def test_init_manager_as_admin(self):
         mock_function = mock.Mock(return_value={"id": "my_fake_id"})
-        func2mock = ('config_tempest.config_tempest.ProjectsClient.'
+        func2mock = ('config_tempest.main.ProjectsClient.'
                      'get_project_by_name')
         self.useFixture(MonkeyPatch(func2mock, mock_function))
         self._get_clients(self.conf, admin=True)
@@ -118,7 +119,7 @@ class TestClientManager(BaseConfigTempestTest):
         self.conf = self._get_alt_conf("v2.0", "v3")
         self.client = self._get_clients(self.conf)
         mock_function = mock.Mock(return_value={"id": "my_fake_id"})
-        func2mock = ('config_tempest.config_tempest.ProjectsClient'
+        func2mock = ('config_tempest.main.ProjectsClient'
                      '.get_project_by_name')
         self.useFixture(MonkeyPatch(func2mock, mock_function))
         self._get_clients(self.conf, admin=True)
@@ -161,7 +162,7 @@ class TestOsClientConfigSupport(BaseConfigTempestTest):
         func2mock = 'os_client_config.cloud_config.CloudConfig.config.get'
         self.useFixture(MonkeyPatch(func2mock, mock_function))
         mock_function = mock.Mock(return_value={"id": "my_fake_id"})
-        func2mock = ('config_tempest.config_tempest.ProjectsClient.'
+        func2mock = ('config_tempest.main.ProjectsClient.'
                      'get_project_by_name')
         self.useFixture(MonkeyPatch(func2mock, mock_function))
 
@@ -173,7 +174,7 @@ class TestOsClientConfigSupport(BaseConfigTempestTest):
             'auth_url': 'http://auth.url.com/'
         }
         # create an empty conf
-        conf = tool.TempestConf()
+        conf = tempest_conf.TempestConf()
         conf.set('identity', 'uri', cloud_args['auth_url'], priority=True)
         # call the function and check if data were obtained properly
         tool.set_cloud_config_values(non_admin, cloud_args, conf)
@@ -229,101 +230,6 @@ class TestOsClientConfigSupport(BaseConfigTempestTest):
                                 self.conf.get('identity', 'admin_tenant_name'))
 
 
-class TestTempestConf(BaseConfigTempestTest):
-    def setUp(self):
-        super(TestTempestConf, self).setUp()
-        self.conf = tool.TempestConf()
-
-    def test_set_value(self):
-        resp = self.conf.set("section", "key", "value")
-        self.assertTrue(resp)
-        self.assertEqual(self.conf.get("section", "key"), "value")
-        self.assertEqual(self.conf.get_defaulted("section", "key"), "value")
-
-    def test_set_value_overwrite(self):
-        # set value wihout priority (default: priority=False)
-        resp = self.conf.set("section", "key", "value")
-        # value should be overwritten, because it wasn't set with priority
-        resp = self.conf.set("section", "key", "value")
-        self.assertTrue(resp)
-
-    def test_set_value_overwrite_priority(self):
-        resp = self.conf.set("sectionPriority", "key", "value", priority=True)
-        resp = self.conf.set("sectionPriority", "key", "value")
-        self.assertFalse(resp)
-
-    def test_set_value_overwrite_by_priority(self):
-        resp = self.conf.set("section", "key", "value")
-        resp = self.conf.set("section", "key", "value", priority=True)
-        self.assertTrue(resp)
-
-    def test_set_value_overwrite_priority_by_priority(self):
-        resp = self.conf.set("sectionPriority", "key", "value", priority=True)
-        resp = self.conf.set("sectionPriority", "key", "value", priority=True)
-        self.assertTrue(resp)
-
-    def test_get_bool_value(self):
-        self.assertTrue(self.conf.get_bool_value("True"))
-        self.assertFalse(self.conf.get_bool_value("False"))
-        self.assertRaises(ValueError, self.conf.get_bool_value, "no")
-
-    def test_remove_values(self):
-        api_exts = "router_availability_zone,rbac-policies,pagination,sorting,"
-        api_exts += "standard-attr-description,router,binding,metering,"
-        api_exts += "allowed-address-pairs,project-id,dvr,l3-flavors,tag-ext"
-        remove_exts = ["router", "project-id", "dvr"]
-        args = Namespace(
-            remove={
-                "identity.username": ["demo"],
-                "identity.tenant_name": ["tenant"],
-                "compute.image_ssh_user": ["rhel", "cirros"],
-                "network-feature-enabled.api_extensions": remove_exts
-            }
-        )
-        self.conf = self._get_conf("v2.0", "v3")
-        self.conf.set("compute", "image_ssh_user", "cirros")
-        self.conf.set("network-feature-enabled", "api_extensions", api_exts)
-        self.conf.remove_values(args)
-        self.assertFalse(self.conf.has_option("identity", "username"))
-        self.assertTrue(self.conf.has_option("identity", "tenant_name"))
-        self.assertFalse(self.conf.has_option("compute", "image_ssh_user"))
-        conf_exts = self.conf.get("network-feature-enabled", "api_extensions")
-        conf_exts = conf_exts.split(',')
-        for ext in api_exts.split(','):
-            if ext in remove_exts:
-                self.assertFalse(ext in conf_exts)
-            else:
-                self.assertTrue(ext in conf_exts)
-
-    def test_remove_values_having_hyphen(self):
-        api_exts = "dvr, l3-flavors, rbac-policies, project-id"
-        remove_exts = ["dvr", "project-id"]
-        args = Namespace(
-            remove={
-                "network-feature-enabled.api-extensions": remove_exts
-            }
-        )
-        self.conf = self._get_conf("v2.0", "v3")
-        self.conf.set("network-feature-enabled", "api-extensions", api_exts)
-        self.conf.remove_values(args)
-        conf_exts = self.conf.get("network-feature-enabled", "api-extensions")
-        conf_exts = conf_exts.split(',')
-        for ext in api_exts.split(','):
-            if ext in remove_exts:
-                self.assertFalse(ext in conf_exts)
-            else:
-                self.assertTrue(ext in conf_exts)
-
-    @mock.patch('config_tempest.config_tempest.LOG')
-    def test_remove_not_defined_values(self, mock_logging):
-        self.conf.remove_values(Namespace(remove={"notExistSection.key": []}))
-        # check if LOG.error was called
-        self.assertTrue(mock_logging.error.called)
-        self.conf.remove_values(Namespace(remove={"section.notExistKey": []}))
-        # check if LOG.error was called
-        self.assertTrue(mock_logging.error.called)
-
-
 class TestConfigTempest(BaseConfigTempestTest):
 
     FAKE_SERVICES = {
@@ -494,7 +400,7 @@ class TestFlavors(BaseConfigTempestTest):
         self.client = self._get_clients(self.conf).flavors
 
     def _mock_create_tempest_flavor(self, mock_function):
-        func2mock = 'config_tempest.config_tempest.find_or_create_flavor'
+        func2mock = 'config_tempest.main.find_or_create_flavor'
         self.useFixture(MonkeyPatch(func2mock, mock_function))
         tool.create_tempest_flavors(client=self.client,
                                     conf=self.conf,
diff --git a/config_tempest/tests/test_config_tempest_image.py b/config_tempest/tests/test_config_tempest_image.py
index 0abab09c..b473acc7 100644
--- a/config_tempest/tests/test_config_tempest_image.py
+++ b/config_tempest/tests/test_config_tempest_image.py
@@ -15,11 +15,12 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from config_tempest import config_tempest as tool
-from config_tempest.tests.base import BaseConfigTempestTest
 from fixtures import MonkeyPatch
 import mock
 
+from config_tempest import main as tool
+from config_tempest.tests.base import BaseConfigTempestTest
+
 
 class TestCreateTempestImages(BaseConfigTempestTest):
 
@@ -33,7 +34,7 @@ class TestCreateTempestImages(BaseConfigTempestTest):
         self.dir = "/img/"
         self.conf.set("scenario", "img_dir", self.dir)
 
-    @mock.patch('config_tempest.config_tempest.find_or_upload_image')
+    @mock.patch('config_tempest.main.find_or_upload_image')
     def test_create_tempest_images_exception(self, mock_find_upload):
         mock_find_upload.side_effect = Exception
         exc = Exception
@@ -45,7 +46,7 @@ class TestCreateTempestImages(BaseConfigTempestTest):
                           allow_creation=self.allow_creation,
                           disk_format=self.disk_format)
 
-    @mock.patch('config_tempest.config_tempest.find_or_upload_image')
+    @mock.patch('config_tempest.main.find_or_upload_image')
     def _test_create_tempest_images(self, mock_find_upload):
         mock_find_upload.side_effect = ["id_c", "id_d"]
         tool.create_tempest_images(client=self.client,
@@ -127,7 +128,7 @@ class TestFindOrUploadImage(BaseConfigTempestTest):
         conf = self._get_conf("v2.0", "v3")
         self.client = self._get_clients(conf).images
 
-    @mock.patch('config_tempest.config_tempest._find_image')
+    @mock.patch('config_tempest.main._find_image')
     def test_find_or_upload_image_not_found_creation_not_allowed(
             self, mock_find_image):
         mock_find_image.return_value = None
@@ -136,9 +137,9 @@ class TestFindOrUploadImage(BaseConfigTempestTest):
                           image_id=None, image_name=None,
                           allow_creation=False)
 
-    @mock.patch('config_tempest.config_tempest._find_image')
-    @mock.patch('config_tempest.config_tempest._download_file')
-    @mock.patch('config_tempest.config_tempest._upload_image')
+    @mock.patch('config_tempest.main._find_image')
+    @mock.patch('config_tempest.main._download_file')
+    @mock.patch('config_tempest.main._upload_image')
     def _test_find_or_upload_image_not_found_creation_allowed_format(
             self, mock_upload_image,
             mock_download_file, mock_find_image, format):
@@ -167,9 +168,9 @@ class TestFindOrUploadImage(BaseConfigTempestTest):
             format="https")
 
     @mock.patch('shutil.copyfile')
-    @mock.patch('config_tempest.config_tempest._find_image')
-    @mock.patch('config_tempest.config_tempest._download_file')
-    @mock.patch('config_tempest.config_tempest._upload_image')
+    @mock.patch('config_tempest.main._find_image')
+    @mock.patch('config_tempest.main._download_file')
+    @mock.patch('config_tempest.main._upload_image')
     def test_find_or_upload_image_not_found_creation_allowed_ftp_old(
             self, mock_upload_image, mock_download_file, mock_find_image,
             mock_copy):
@@ -190,7 +191,7 @@ class TestFindOrUploadImage(BaseConfigTempestTest):
         self.assertEqual(image_id, "my_fake_id")
 
     @mock.patch('os.path.isfile')
-    @mock.patch('config_tempest.config_tempest._find_image')
+    @mock.patch('config_tempest.main._find_image')
     def test_find_or_upload_image_found_downloaded(
             self, mock_find_image, mock_isfile):
         mock_find_image.return_value = \
@@ -201,9 +202,9 @@ class TestFindOrUploadImage(BaseConfigTempestTest):
             image_name=None, allow_creation=True)
         self.assertEqual(image_id, "my_fake_id")
 
-    @mock.patch('config_tempest.config_tempest._download_image')
+    @mock.patch('config_tempest.main._download_image')
     @mock.patch('os.path.isfile')
-    @mock.patch('config_tempest.config_tempest._find_image')
+    @mock.patch('config_tempest.main._find_image')
     def test_find_or_upload_image_found_not_downloaded(
             self, mock_find_image, mock_isfile, mock_download_image):
         image_id = "my_fake_id"
diff --git a/config_tempest/tests/test_config_tempest_network.py b/config_tempest/tests/test_config_tempest_network.py
index 3f83d734..aa7b81e5 100644
--- a/config_tempest/tests/test_config_tempest_network.py
+++ b/config_tempest/tests/test_config_tempest_network.py
@@ -15,11 +15,12 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from config_tempest import config_tempest as tool
-from config_tempest.tests.base import BaseConfigTempestTest
 from fixtures import MonkeyPatch
 import mock
 
+from config_tempest import main as tool
+from config_tempest.tests.base import BaseConfigTempestTest
+
 
 class TestCreateTempestNetworks(BaseConfigTempestTest):
 
@@ -92,7 +93,7 @@ class TestCreateTempestNetworks(BaseConfigTempestTest):
         self.assertEqual(self.conf.get('network', 'floating_network_name'),
                          'tempest-network')
 
-    @mock.patch('config_tempest.config_tempest.LOG')
+    @mock.patch('config_tempest.main.LOG')
     def test_create_network_auto_discover_not_found(self, mock_logging):
         neutron_client = self.clients.get_neutron_client()
         # delete subnets => network will not be found
diff --git a/config_tempest/tests/test_config_tempest_user.py b/config_tempest/tests/test_config_tempest_user.py
index 60510b69..0e563bcc 100644
--- a/config_tempest/tests/test_config_tempest_user.py
+++ b/config_tempest/tests/test_config_tempest_user.py
@@ -15,11 +15,12 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from config_tempest import config_tempest as tool
-from config_tempest.tests.base import BaseConfigTempestTest
 import mock
 from tempest.lib import exceptions
 
+from config_tempest import main as tool
+from config_tempest.tests.base import BaseConfigTempestTest
+
 
 class TestCreateTempestUser(BaseConfigTempestTest):
 
@@ -30,9 +31,8 @@ class TestCreateTempestUser(BaseConfigTempestTest):
         self.users_client = self._get_clients(self.conf).users
         self.roles_client = self._get_clients(self.conf).roles
 
-    @mock.patch('config_tempest.config_tempest.'
-                'create_user_with_tenant')
-    @mock.patch('config_tempest.config_tempest.give_role_to_user')
+    @mock.patch('config_tempest.main.create_user_with_tenant')
+    @mock.patch('config_tempest.main.give_role_to_user')
     def _test_create_tempest_user(self,
                                   mock_give_role_to_user,
                                   mock_create_user_with_tenant,
@@ -110,9 +110,8 @@ class TestCreateUserWithTenant(BaseConfigTempestTest):
         self.tenant_description = "Tenant for Tempest %s user" % self.username
         self.email = "%s@test.com" % self.username
 
-    @mock.patch('config_tempest.config_tempest.ProjectsClient'
-                '.get_project_by_name')
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.create_project')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.create_project')
     @mock.patch('tempest.lib.services.identity.v2.users_client.'
                 'UsersClient.create_user')
     def test_create_user_with_tenant(self,
@@ -133,9 +132,8 @@ class TestCreateUserWithTenant(BaseConfigTempestTest):
                                             tenantId="fake-id",
                                             email=self.email)
 
-    @mock.patch('config_tempest.config_tempest.ProjectsClient'
-                '.get_project_by_name')
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.create_project')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.create_project')
     @mock.patch('tempest.lib.services.identity.v2'
                 '.users_client.UsersClient.create_user')
     def test_create_user_with_tenant_tenant_exists(
@@ -163,8 +161,7 @@ class TestCreateUserWithTenant(BaseConfigTempestTest):
     @mock.patch('tempest.lib.services.identity.v2.'
                 'users_client.UsersClient.update_user_password')
     @mock.patch('tempest.common.identity.get_user_by_username')
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.'
-                'get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
     @mock.patch('tempest.lib.services.identity.v2.'
                 'tenants_client.TenantsClient.create_tenant')
     @mock.patch('tempest.lib.services.identity.'
@@ -194,9 +191,8 @@ class TestCreateUserWithTenant(BaseConfigTempestTest):
     @mock.patch('tempest.lib.services.identity.v2.'
                 'users_client.UsersClient.update_user_password')
     @mock.patch('tempest.common.identity.get_user_by_username')
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.'
-                'get_project_by_name')
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.create_project')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.create_project')
     @mock.patch('tempest.lib.services.identity.v2.'
                 'users_client.UsersClient.create_user')
     def test_create_user_with_tenant_exists_user_exists(
@@ -245,8 +241,7 @@ class TestGiveRoleToUser(BaseConfigTempestTest):
                        {'name': "fake_role2",
                         'id': "fake_role_id2"}]}
 
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.'
-                'get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
     @mock.patch('tempest.lib.services.identity.v2.'
                 'users_client.UsersClient.list_users')
     @mock.patch('tempest.lib.services.identity.v2.'
@@ -276,8 +271,7 @@ class TestGiveRoleToUser(BaseConfigTempestTest):
         mock_create_user_role_on_project.assert_called_with(
             "fake_tenant_id", "fake_user_id", "fake_role_id")
 
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.'
-                'get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
     @mock.patch('tempest.lib.services.identity.'
                 'v2.users_client.UsersClient.list_users')
     @mock.patch('tempest.lib.services.identity.v2.'
@@ -308,8 +302,7 @@ class TestGiveRoleToUser(BaseConfigTempestTest):
                           tenant_name=self.tenant_name,
                           role_name=role_name)
 
-    @mock.patch('config_tempest.config_tempest.ProjectsClient.'
-                'get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
     @mock.patch('tempest.lib.services.identity.v2.'
                 'users_client.UsersClient.list_users')
     @mock.patch('tempest.lib.services.identity.v2.'
@@ -339,8 +332,7 @@ class TestGiveRoleToUser(BaseConfigTempestTest):
             role_name=self.role_name,
             role_required=False)
 
-    @mock.patch('config_tempest.config_tempest.ProjectsClient'
-                '.get_project_by_name')
+    @mock.patch('config_tempest.main.ProjectsClient.get_project_by_name')
     @mock.patch('tempest.lib.services.identity.v2.'
                 'users_client.UsersClient.list_users')
     @mock.patch('tempest.lib.services.identity.v2.'
diff --git a/config_tempest/tests/test_tempest_conf.py b/config_tempest/tests/test_tempest_conf.py
new file mode 100644
index 00000000..978e7171
--- /dev/null
+++ b/config_tempest/tests/test_tempest_conf.py
@@ -0,0 +1,112 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2018 Red Hat, Inc.
+# All Rights Reserved.
+#
+# 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.
+
+import mock
+
+from config_tempest import tempest_conf
+from config_tempest.tests.base import BaseConfigTempestTest
+
+
+class TestTempestConf(BaseConfigTempestTest):
+    def setUp(self):
+        super(TestTempestConf, self).setUp()
+        self.conf = tempest_conf.TempestConf()
+
+    def test_set_value(self):
+        resp = self.conf.set("section", "key", "value")
+        self.assertTrue(resp)
+        self.assertEqual(self.conf.get("section", "key"), "value")
+        self.assertEqual(self.conf.get_defaulted("section", "key"), "value")
+
+    def test_set_value_overwrite(self):
+        # set value wihout priority (default: priority=False)
+        resp = self.conf.set("section", "key", "value")
+        # value should be overwritten, because it wasn't set with priority
+        resp = self.conf.set("section", "key", "value")
+        self.assertTrue(resp)
+
+    def test_set_value_overwrite_priority(self):
+        resp = self.conf.set("sectionPriority", "key", "value", priority=True)
+        resp = self.conf.set("sectionPriority", "key", "value")
+        self.assertFalse(resp)
+
+    def test_set_value_overwrite_by_priority(self):
+        resp = self.conf.set("section", "key", "value")
+        resp = self.conf.set("section", "key", "value", priority=True)
+        self.assertTrue(resp)
+
+    def test_set_value_overwrite_priority_by_priority(self):
+        resp = self.conf.set("sectionPriority", "key", "value", priority=True)
+        resp = self.conf.set("sectionPriority", "key", "value", priority=True)
+        self.assertTrue(resp)
+
+    def test_get_bool_value(self):
+        self.assertTrue(self.conf.get_bool_value("True"))
+        self.assertFalse(self.conf.get_bool_value("False"))
+        self.assertRaises(ValueError, self.conf.get_bool_value, "no")
+
+    def test_remove_values(self):
+        api_exts = "router_availability_zone,rbac-policies,pagination,sorting,"
+        api_exts += "standard-attr-description,router,binding,metering,"
+        api_exts += "allowed-address-pairs,project-id,dvr,l3-flavors,tag-ext"
+        remove_exts = ["router", "project-id", "dvr"]
+        remove = {
+            "identity.username": ["demo"],
+            "identity.tenant_name": ["tenant"],
+            "compute.image_ssh_user": ["rhel", "cirros"],
+            "network-feature-enabled.api_extensions": remove_exts
+        }
+        self.conf = self._get_conf("v2.0", "v3")
+        self.conf.set("compute", "image_ssh_user", "cirros")
+        self.conf.set("network-feature-enabled", "api_extensions", api_exts)
+        self.conf.remove_values(remove)
+        self.assertFalse(self.conf.has_option("identity", "username"))
+        self.assertTrue(self.conf.has_option("identity", "tenant_name"))
+        self.assertFalse(self.conf.has_option("compute", "image_ssh_user"))
+        conf_exts = self.conf.get("network-feature-enabled", "api_extensions")
+        conf_exts = conf_exts.split(',')
+        for ext in api_exts.split(','):
+            if ext in remove_exts:
+                self.assertFalse(ext in conf_exts)
+            else:
+                self.assertTrue(ext in conf_exts)
+
+    def test_remove_values_having_hyphen(self):
+        api_exts = "dvr, l3-flavors, rbac-policies, project-id"
+        remove_exts = ["dvr", "project-id"]
+        remove = {
+            "network-feature-enabled.api-extensions": remove_exts
+        }
+        self.conf = self._get_conf("v2.0", "v3")
+        self.conf.set("network-feature-enabled", "api-extensions", api_exts)
+        self.conf.remove_values(remove)
+        conf_exts = self.conf.get("network-feature-enabled", "api-extensions")
+        conf_exts = conf_exts.split(',')
+        for ext in api_exts.split(','):
+            if ext in remove_exts:
+                self.assertFalse(ext in conf_exts)
+            else:
+                self.assertTrue(ext in conf_exts)
+
+    @mock.patch('config_tempest.tempest_conf.LOG')
+    def test_remove_not_defined_values(self, mock_logging):
+        self.conf.remove_values({"notExistSection.key": []})
+        # check if LOG.error was called
+        self.assertTrue(mock_logging.error.called)
+        self.conf.remove_values({"section.notExistKey": []})
+        # check if LOG.error was called
+        self.assertTrue(mock_logging.error.called)
diff --git a/setup.cfg b/setup.cfg
index 2976e589..ea01d66b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,7 +28,7 @@ data_files =
 
 [entry_points]
 console_scripts =
-    discover-tempest-config = config_tempest.config_tempest:main
+    discover-tempest-config = config_tempest.main:main
 
 [build_sphinx]
 source-dir = doc/source