Pin black version in tox.ini to 23.12.1
[osm/N2VC.git] / n2vc / tests / unit / test_n2vc_juju_conn.py
index 4fef1f2..2ce5024 100644 (file)
@@ -15,7 +15,7 @@
 
 import asyncio
 import logging
-from unittest.mock import Mock
+from unittest.mock import Mock, MagicMock
 from unittest.mock import patch
 
 
@@ -23,6 +23,7 @@ import asynctest
 from n2vc.definitions import Offer, RelationEndpoint
 from n2vc.n2vc_juju_conn import N2VCJujuConnector
 from osm_common import fslocal
+from osm_common.dbmemory import DbMemory
 from n2vc.exceptions import (
     N2VCBadArgumentsException,
     N2VCException,
@@ -30,6 +31,8 @@ from n2vc.exceptions import (
 )
 from n2vc.tests.unit.utils import AsyncMock
 from n2vc.vca.connection_data import ConnectionData
+from n2vc.tests.unit.testdata import test_db_descriptors as descriptors
+import yaml
 
 
 class N2VCJujuConnTestCase(asynctest.TestCase):
@@ -37,10 +40,7 @@ class N2VCJujuConnTestCase(asynctest.TestCase):
     @asynctest.mock.patch("n2vc.n2vc_juju_conn.get_connection")
     @asynctest.mock.patch("n2vc.vca.connection_data.base64_to_cacert")
     def setUp(
-        self,
-        mock_base64_to_cacert=None,
-        mock_get_connection=None,
-        mock_store=None,
+        self, mock_base64_to_cacert=None, mock_get_connection=None, mock_store=None
     ):
         self.loop = asyncio.get_event_loop()
         self.db = Mock()
@@ -73,7 +73,6 @@ class N2VCJujuConnTestCase(asynctest.TestCase):
             db=self.db,
             fs=fslocal.FsLocal(),
             log=None,
-            loop=self.loop,
             on_update_db=None,
         )
         N2VCJujuConnector.get_public_key.assert_not_called()
@@ -134,10 +133,6 @@ class UpdateVcaStatusTest(N2VCJujuConnTestCase):
             self.n2vc.libjuju.get_application_configs.assert_not_called_once()
 
 
-@asynctest.mock.patch("osm_common.fslocal.FsLocal.file_exists")
-@asynctest.mock.patch(
-    "osm_common.fslocal.FsLocal.path", new_callable=asynctest.PropertyMock, create=True
-)
 class K8sProxyCharmsTest(N2VCJujuConnTestCase):
     def setUp(self):
         super(K8sProxyCharmsTest, self).setUp()
@@ -145,51 +140,53 @@ class K8sProxyCharmsTest(N2VCJujuConnTestCase):
         self.n2vc.libjuju.add_model = AsyncMock()
         self.n2vc.libjuju.deploy_charm = AsyncMock()
         self.n2vc.libjuju.model_exists.return_value = False
+        self.db = DbMemory()
+        self.fs = fslocal.FsLocal()
+        self.fs.path = "/"
+        self.n2vc.fs = self.fs
+        self.n2vc.db = self.db
+        self.db.create_list("nsrs", yaml.safe_load(descriptors.db_nsrs_text))
+        self.db.create_list("vnfrs", yaml.safe_load(descriptors.db_vnfrs_text))
 
     @patch(
         "n2vc.n2vc_juju_conn.generate_random_alfanum_string",
         **{"return_value": "random"}
     )
-    def test_success(
-        self,
-        mock_generate_random_alfanum_string,
-        mock_path,
-        mock_file_exists,
-    ):
-        mock_file_exists.return_value = True
-        mock_path.return_value = "/path"
+    def test_success(self, mock_generate_random_alfanum_string):
+        self.n2vc.fs.file_exists = MagicMock(create_autospec=True)
+        self.n2vc.fs.file_exists.return_value = True
         ee_id = self.loop.run_until_complete(
             self.n2vc.install_k8s_proxy_charm(
-                "charm",
-                "nsi-id.ns-id.vnf-id.vdu",
-                "////path/",
+                "simple",
+                ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0",
+                "path",
                 {},
             )
         )
 
         self.n2vc.libjuju.add_model.assert_called_once()
         self.n2vc.libjuju.deploy_charm.assert_called_once_with(
-            model_name="ns-id-k8s",
-            application_name="app-vnf-vnf-id-vdu-vdu-random",
-            path="/path/path/",
+            model_name="dbfbd751-3de4-4e68-bd40-ec5ae0a53898-k8s",
+            application_name="simple-ee-z0-vnf1-vnf",
+            path="//path",
             machine_id=None,
             db_dict={},
             progress_timeout=None,
             total_timeout=None,
             config=None,
         )
-        self.assertEqual(ee_id, "ns-id-k8s.app-vnf-vnf-id-vdu-vdu-random.k8s")
+        self.assertEqual(
+            ee_id, "dbfbd751-3de4-4e68-bd40-ec5ae0a53898-k8s.simple-ee-z0-vnf1-vnf.k8s"
+        )
 
     def test_no_artifact_path(
         self,
-        mock_path,
-        mock_file_exists,
     ):
         with self.assertRaises(N2VCBadArgumentsException):
             ee_id = self.loop.run_until_complete(
                 self.n2vc.install_k8s_proxy_charm(
-                    "charm",
-                    "nsi-id.ns-id.vnf-id.vdu",
+                    "simple",
+                    ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0",
                     "",
                     {},
                 )
@@ -198,15 +195,13 @@ class K8sProxyCharmsTest(N2VCJujuConnTestCase):
 
     def test_no_db(
         self,
-        mock_path,
-        mock_file_exists,
     ):
         with self.assertRaises(N2VCBadArgumentsException):
             ee_id = self.loop.run_until_complete(
                 self.n2vc.install_k8s_proxy_charm(
-                    "charm",
-                    "nsi-id.ns-id.vnf-id.vdu",
-                    "/path/",
+                    "simple",
+                    ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0",
+                    "path",
                     None,
                 )
             )
@@ -214,16 +209,15 @@ class K8sProxyCharmsTest(N2VCJujuConnTestCase):
 
     def test_file_not_exists(
         self,
-        mock_path,
-        mock_file_exists,
     ):
-        mock_file_exists.return_value = False
+        self.n2vc.fs.file_exists = MagicMock(create_autospec=True)
+        self.n2vc.fs.file_exists.return_value = False
         with self.assertRaises(N2VCBadArgumentsException):
             ee_id = self.loop.run_until_complete(
                 self.n2vc.install_k8s_proxy_charm(
-                    "charm",
-                    "nsi-id.ns-id.vnf-id.vdu",
-                    "/path/",
+                    "simple",
+                    ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0",
+                    "path",
                     {},
                 )
             )
@@ -231,18 +225,18 @@ class K8sProxyCharmsTest(N2VCJujuConnTestCase):
 
     def test_exception(
         self,
-        mock_path,
-        mock_file_exists,
     ):
-        mock_file_exists.return_value = True
-        mock_path.return_value = "/path"
+        self.n2vc.fs.file_exists = MagicMock(create_autospec=True)
+        self.n2vc.fs.file_exists.return_value = True
+        self.n2vc.fs.path = MagicMock(create_autospec=True)
+        self.n2vc.fs.path.return_value = "path"
         self.n2vc.libjuju.deploy_charm.side_effect = Exception()
         with self.assertRaises(N2VCException):
             ee_id = self.loop.run_until_complete(
                 self.n2vc.install_k8s_proxy_charm(
-                    "charm",
-                    "nsi-id.ns-id.vnf-id.vdu",
-                    "path/",
+                    "simple",
+                    ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0",
+                    "path",
                     {},
                 )
             )
@@ -257,14 +251,16 @@ class AddRelationTest(N2VCJujuConnTestCase):
         self.n2vc.libjuju.get_controller = AsyncMock()
         self.n2vc.libjuju.consume = AsyncMock()
 
-    def test_standard_relation(self):
-        relation_endpoint_1 = RelationEndpoint("model-1.app1.0", None, "endpoint")
-        relation_endpoint_2 = RelationEndpoint("model-1.app2.1", None, "endpoint")
+    def test_standard_relation_same_model_and_controller(self):
+        relation_endpoint_1 = RelationEndpoint("model-1.app1.0", None, "endpoint1")
+        relation_endpoint_2 = RelationEndpoint("model-1.app2.1", None, "endpoint2")
         self.loop.run_until_complete(
             self.n2vc.add_relation(relation_endpoint_1, relation_endpoint_2)
         )
         self.n2vc.libjuju.add_relation.assert_called_once_with(
-            model_name="model-1", endpoint_1="app1:endpoint", endpoint_2="app2:endpoint"
+            model_name="model-1",
+            endpoint_1="app1:endpoint1",
+            endpoint_2="app2:endpoint2",
         )
         self.n2vc.libjuju.offer.assert_not_called()
         self.n2vc.libjuju.consume.assert_not_called()
@@ -284,6 +280,26 @@ class AddRelationTest(N2VCJujuConnTestCase):
             "model-2", "app2:endpoint", "saas"
         )
 
+    def test_cmr_relation_different_controller(self):
+        self.n2vc._get_libjuju = AsyncMock(return_value=self.n2vc.libjuju)
+        relation_endpoint_1 = RelationEndpoint(
+            "model-1.app1.0", "vca-id-1", "endpoint1"
+        )
+        relation_endpoint_2 = RelationEndpoint(
+            "model-1.app2.1", "vca-id-2", "endpoint2"
+        )
+        offer = Offer("admin/model-1.app1")
+        self.n2vc.libjuju.offer.return_value = offer
+        self.n2vc.libjuju.consume.return_value = "saas"
+        self.loop.run_until_complete(
+            self.n2vc.add_relation(relation_endpoint_1, relation_endpoint_2)
+        )
+        self.n2vc.libjuju.offer.assert_called_once_with(relation_endpoint_1)
+        self.n2vc.libjuju.consume.assert_called_once()
+        self.n2vc.libjuju.add_relation.assert_called_once_with(
+            "model-1", "app2:endpoint2", "saas"
+        )
+
     def test_relation_exception(self):
         relation_endpoint_1 = RelationEndpoint("model-1.app1.0", None, "endpoint")
         relation_endpoint_2 = RelationEndpoint("model-2.app2.1", None, "endpoint")
@@ -377,3 +393,1103 @@ class UpgradeCharmTest(N2VCJujuConnTestCase):
             model_name="sample_model",
             total_timeout=None,
         )
+
+
+class GenerateApplicationNameTest(N2VCJujuConnTestCase):
+    vnf_id = "dbfbd751-3de4-4e68-bd40-ec5ae0a53898"
+
+    def setUp(self):
+        super(GenerateApplicationNameTest, self).setUp()
+        self.db = MagicMock(DbMemory)
+
+    @patch(
+        "n2vc.n2vc_juju_conn.generate_random_alfanum_string",
+        **{"return_value": "random"}
+    )
+    def test_generate_backward_compatible_application_name(
+        self, mock_generate_random_alfanum
+    ):
+        vdu_id = "mgmtVM"
+        vdu_count = "0"
+        expected_result = "app-vnf-ec5ae0a53898-vdu-mgmtVM-cnt-0-random"
+
+        application_name = self.n2vc._generate_backward_compatible_application_name(
+            GenerateApplicationNameTest.vnf_id, vdu_id, vdu_count
+        )
+        self.assertEqual(application_name, expected_result)
+
+    @patch(
+        "n2vc.n2vc_juju_conn.generate_random_alfanum_string",
+        **{"return_value": "random"}
+    )
+    def test_generate_backward_compatible_application_name_without_vnf_id_vdu_id(
+        self, mock_generate_random_alfanum
+    ):
+        vnf_id = None
+        vdu_id = ""
+        vdu_count = None
+        expected_result = "app--random"
+        application_name = self.n2vc._generate_backward_compatible_application_name(
+            vnf_id, vdu_id, vdu_count
+        )
+
+        self.assertEqual(application_name, expected_result)
+        self.assertLess(len(application_name), 50)
+
+    def test_find_charm_level_with_vnf_id(self):
+        vdu_id = ""
+        expected_result = "vnf-level"
+        charm_level = self.n2vc._find_charm_level(
+            GenerateApplicationNameTest.vnf_id, vdu_id
+        )
+        self.assertEqual(charm_level, expected_result)
+
+    def test_find_charm_level_with_vdu_id(self):
+        vnf_id = ""
+        vdu_id = "mgmtVM"
+        with self.assertRaises(N2VCException):
+            self.n2vc._find_charm_level(vnf_id, vdu_id)
+
+    def test_find_charm_level_with_vnf_id_and_vdu_id(self):
+        vdu_id = "mgmtVM"
+        expected_result = "vdu-level"
+        charm_level = self.n2vc._find_charm_level(
+            GenerateApplicationNameTest.vnf_id, vdu_id
+        )
+        self.assertEqual(charm_level, expected_result)
+
+    def test_find_charm_level_without_vnf_id_and_vdu_id(self):
+        vnf_id = ""
+        vdu_id = ""
+        expected_result = "ns-level"
+        charm_level = self.n2vc._find_charm_level(vnf_id, vdu_id)
+        self.assertEqual(charm_level, expected_result)
+
+    def test_generate_application_name_ns_charm(self):
+        charm_level = "ns-level"
+        vnfrs = {}
+        vca_records = [
+            {
+                "target_element": "ns",
+                "member-vnf-index": "",
+                "vdu_id": None,
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": None,
+                "vdu_name": None,
+                "type": "proxy_charm",
+                "ee_descriptor_id": None,
+                "charm_name": "simple-ns-charm-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh",
+                "ee_id": None,
+                "application": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vnf_count = ""
+        vdu_count = ""
+        vdu_id = None
+        expected_result = "simple-ns-charm-abc-000-rrrr-nnnn-4444-h-ns"
+        application_name = self.n2vc._generate_application_name(
+            charm_level,
+            vnfrs,
+            vca_records,
+            vnf_count=vnf_count,
+            vdu_id=vdu_id,
+            vdu_count=vdu_count,
+        )
+        self.assertEqual(application_name, expected_result)
+        self.assertLess(len(application_name), 50)
+
+    def test_generate_application_name_ns_charm_empty_vca_records(self):
+        charm_level = "ns-level"
+        vnfrs = {}
+        vca_records = []
+        vnf_count = ""
+        vdu_count = ""
+        vdu_id = None
+        with self.assertRaises(N2VCException):
+            self.n2vc._generate_application_name(
+                charm_level,
+                vnfrs,
+                vca_records,
+                vnf_count=vnf_count,
+                vdu_id=vdu_id,
+                vdu_count=vdu_count,
+            )
+
+    def test_generate_application_name_vnf_charm(self):
+        charm_level = "vnf-level"
+        vnfrs = {"member-vnf-index-ref": "vnf111-xxx-yyy-zzz"}
+        vca_records = [
+            {
+                "target_element": "vnf/vnf1",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vnf_count = "1"
+        vdu_count = ""
+        vdu_id = None
+        expected_result = "simple-ee-ab-1-vnf111-xxx-y-vnf"
+        application_name = self.n2vc._generate_application_name(
+            charm_level,
+            vnfrs,
+            vca_records,
+            vnf_count=vnf_count,
+            vdu_id=vdu_id,
+            vdu_count=vdu_count,
+        )
+        self.assertEqual(application_name, expected_result)
+        self.assertLess(len(application_name), 50)
+
+    def test_generate_application_name_vdu_charm_kdu_name_in_vca_record_is_none(self):
+        charm_level = "vdu-level"
+        vnfrs = {
+            "member-vnf-index-ref": "vnf111-xxx-yyy-zzz",
+            "vdur": [
+                {"_id": "38912ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "mgmtVM"},
+                {"_id": "45512ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "dataVM"},
+            ],
+        }
+        vca_records = [
+            {
+                "target_element": "vnf/vnf1/mgmtvm",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": "mgmtVM",
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "mgmtvm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            },
+            {
+                "target_element": "vnf/vnf1/dataVM",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": "dataVM",
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "datavm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-8888-hhh-3333-yyyy-888-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            },
+        ]
+        vnf_count = "2"
+        vdu_count = "0"
+        vdu_id = "mgmtVM"
+        expected_result = "simple-ee-ab-2-vnf111-xxx-y-mgmtVM-0-vdu"
+        application_name = self.n2vc._generate_application_name(
+            charm_level,
+            vnfrs,
+            vca_records,
+            vnf_count=vnf_count,
+            vdu_id=vdu_id,
+            vdu_count=vdu_count,
+        )
+        self.assertEqual(application_name, expected_result)
+        self.assertLess(len(application_name), 50)
+
+    def test_generate_application_name_vdu_charm_vdu_id_kdu_name_in_vca_record_are_both_set(
+        self,
+    ):
+        charm_level = "vdu-level"
+        vnfrs = {
+            "member-vnf-index-ref": "vnf111-xxx-yyy-zzz",
+            "vdur": [
+                {"_id": "38912ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "mgmtVM"},
+                {"_id": "45512ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "dataVM"},
+            ],
+        }
+        vca_records = [
+            {
+                "target_element": "vnf/vnf1/mgmtVM",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": "mgmtVM",
+                "kdu_name": "mgmtVM",
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "mgmtvm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            },
+            {
+                "target_element": "vnf/vnf1/dataVM",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": "dataVM",
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "datavm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-8888-hhh-3333-yyyy-888-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            },
+        ]
+        vnf_count = "2"
+        vdu_count = "0"
+        vdu_id = "mgmtVM"
+        expected_result = "simple-ee-ab-2-vnf111-xxx-y-mgmtVM-0-vdu"
+        application_name = self.n2vc._generate_application_name(
+            charm_level,
+            vnfrs,
+            vca_records,
+            vnf_count=vnf_count,
+            vdu_id=vdu_id,
+            vdu_count=vdu_count,
+        )
+        self.assertEqual(application_name, expected_result)
+        self.assertLess(len(application_name), 50)
+
+    def test_generate_application_name_vdu_charm_both_vdu_id_kdu_name_in_vca_record_are_none(
+        self,
+    ):
+        charm_level = "vdu-level"
+        vnfrs = {"member-vnf-index-ref": "vnf111-xxx-yyy-zzz"}
+        vca_records = [
+            {
+                "target_element": "vnf/vnf1/mgmtVM",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": None,
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "mgmtvm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vnf_count = "2"
+        vdu_count = "0"
+        vdu_id = "mgmtVM"
+        with self.assertRaises(KeyError):
+            self.n2vc._generate_application_name(
+                charm_level,
+                vnfrs,
+                vca_records,
+                vnf_count=vnf_count,
+                vdu_id=vdu_id,
+                vdu_count=vdu_count,
+            )
+
+    def test_generate_application_name_vdu_charm_given_vdu_id_is_none(self):
+        charm_level = "vdu-level"
+        vnfrs = {"member-vnf-index-ref": "vnf111-xxx-yyy-zzz"}
+        vca_records = [
+            {
+                "target_element": "vnf/vnf1/mgmtvVM",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": None,
+                "kdu_name": "mgmtVM",
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "mgmtvm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vnf_count = "2"
+        vdu_count = "0"
+        vdu_id = None
+        with self.assertRaises(N2VCException):
+            self.n2vc._generate_application_name(
+                charm_level,
+                vnfrs,
+                vca_records,
+                vnf_count=vnf_count,
+                vdu_id=vdu_id,
+                vdu_count=vdu_count,
+            )
+
+    def test_generate_application_name_vdu_charm_vdu_id_does_not_match_with_the_key_in_vca_record(
+        self,
+    ):
+        charm_level = "vdu-level"
+        vnfrs = {"member-vnf-index-ref": "vnf111-xxx-yyy-zzz"}
+        vca_records = [
+            {
+                "target_element": "vnf/vnf1/mgmtVM",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": None,
+                "kdu_name": "mgmtVM",
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "mgmtvm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vnf_count = "2"
+        vdu_count = "0"
+        vdu_id = "mgmtvm"
+        with self.assertRaises(KeyError):
+            self.n2vc._generate_application_name(
+                charm_level,
+                vnfrs,
+                vca_records,
+                vnf_count=vnf_count,
+                vdu_id=vdu_id,
+                vdu_count=vdu_count,
+            )
+
+    def test_generate_application_name_vdu_charm_vdu_id_in_vca_record_is_none(self):
+        charm_level = "vdu-level"
+        vnfrs = {"member-vnf-index-ref": "vnf111-xxx-yyy-zzz"}
+        vca_records = [
+            {
+                "target_element": "vnf/vnf1/mgmtVM",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": None,
+                "kdu_name": "mgmtVM",
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "mgmtvm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vnf_count = "2"
+        vdu_count = "0"
+        vdu_id = "mgmtVM"
+        expected_result = "simple-ee-ab-2-vnf111-xxx-y-mgmtVM-0-vdu"
+        application_name = self.n2vc._generate_application_name(
+            charm_level,
+            vnfrs,
+            vca_records,
+            vnf_count=vnf_count,
+            vdu_id=vdu_id,
+            vdu_count=vdu_count,
+        )
+        self.assertEqual(application_name, expected_result)
+        self.assertLess(len(application_name), 50)
+
+    def test_get_vnf_count_db_vnfr_ns_charm(self):
+        self.db.get_one.return_value = {"member-vnf-index-ref": "sample-ref"}
+        charm_level = "ns-level"
+        vnf_id_and_count = "m7fbd751-3de4-4e68-bd40-ec5ae0a53898-4"
+        with patch.object(self.n2vc, "db", self.db):
+            vnf_count, db_vnfr = self.n2vc._get_vnf_count_and_record(
+                charm_level, vnf_id_and_count
+            )
+        self.assertEqual(vnf_count, "")
+        self.assertEqual(db_vnfr, {})
+
+    def test_get_vnf_count_db_vnfr_vnf_charm(self):
+        self.db.get_one.return_value = {"member-vnf-index-ref": "sample-ref"}
+        charm_level = "vnf-level"
+        vnf_id_and_count = "m7fbd751-3de4-4e68-bd40-ec5ae0a53898-4"
+        with patch.object(self.n2vc, "db", self.db):
+            vnf_count, db_vnfr = self.n2vc._get_vnf_count_and_record(
+                charm_level, vnf_id_and_count
+            )
+        self.assertEqual(vnf_count, "4")
+        self.assertEqual(db_vnfr, {"member-vnf-index-ref": "sample-ref"})
+
+    def test_get_vnf_count_db_vnfr_vdu_charm(self):
+        self.db.get_one.return_value = {"member-vnf-index-ref": "sample-ref"}
+        charm_level = "vdu-level"
+        vnf_id_and_count = "m7fbd751-3de4-4e68-bd40-ec5ae0a53898-2"
+        with patch.object(self.n2vc, "db", self.db):
+            vnf_count, db_vnfr = self.n2vc._get_vnf_count_and_record(
+                charm_level, vnf_id_and_count
+            )
+        self.assertEqual(vnf_count, "2")
+        self.assertEqual(db_vnfr, {"member-vnf-index-ref": "sample-ref"})
+
+    def test_get_vca_records_vdu_charm(self):
+        charm_level = "vdu-level"
+        db_vnfr = {
+            "member-vnf-index-ref": "vnf111-xxx-yyy-zzz",
+            "vdur": [
+                {"_id": "38912ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "mgmtVM"},
+                {"_id": "45512ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "dataVM"},
+            ],
+        }
+        db_nsr = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "vnf/vnf2/datavm",
+                            "member-vnf-index": "vnf222-xxx-yyy-zzz",
+                            "vdu_id": "45512ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "datavm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-8888-hhh-3333-yyyy-888-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        expected_result = [
+            {
+                "target_element": "vnf/vnf1/mgmtvm",
+                "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                "vdu_name": "mgmtvm",
+                "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vca_records = self.n2vc._get_vca_records(charm_level, db_nsr, db_vnfr)
+        self.assertEqual(vca_records, expected_result)
+
+    def test_get_vca_records_vnf_charm_member_vnf_index_mismatch(self):
+        charm_level = "vnf-level"
+        db_vnfr = {"member-vnf-index-ref": "vnf222-xxx-yyy-zzz"}
+        db_nsr = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "45512ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "datavm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-8888-hhh-3333-yyyy-888-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        expected_result = []
+        vca_records = self.n2vc._get_vca_records(charm_level, db_nsr, db_vnfr)
+        self.assertEqual(vca_records, expected_result)
+
+    def test_get_vca_records_ns_charm(self):
+        charm_level = "ns-level"
+        db_vnfr = {"member-vnf-index-ref": "vnf222-xxx-yyy-zzz"}
+        db_nsr = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "charm_name": "simple-ns-charm-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        expected_result = [
+            {
+                "target_element": "ns",
+                "member-vnf-index": None,
+                "vdu_id": None,
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": "",
+                "vdu_name": "",
+                "ee_descriptor_id": "",
+                "charm_name": "simple-ns-charm-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vca_records = self.n2vc._get_vca_records(charm_level, db_nsr, db_vnfr)
+        self.assertEqual(vca_records, expected_result)
+
+    def test_get_vca_records_ns_charm_empty_charm_name(self):
+        charm_level = "ns-level"
+        db_vnfr = {"member-vnf-index-ref": "vnf222-xxx-yyy-zzz"}
+        db_nsr = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        expected_result = [
+            {
+                "target_element": "ns",
+                "member-vnf-index": None,
+                "vdu_id": None,
+                "kdu_name": None,
+                "vdu_count_index": None,
+                "vnfd_id": "",
+                "vdu_name": "",
+                "ee_descriptor_id": "",
+                "charm_name": "",
+                "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+            }
+        ]
+        vca_records = self.n2vc._get_vca_records(charm_level, db_nsr, db_vnfr)
+        self.assertEqual(vca_records, expected_result)
+
+    def test_get_application_name_vnf_charm(self):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {"member-vnf-index-ref": "vnf111-xxx-yyy-zzz"}
+        vnf_count = "0"
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        expected_result = "simple-ee-ab-z0-vnf111-xxx-y-vnf"
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            application_name = self.n2vc._get_application_name(namespace)
+            self.assertEqual(application_name, expected_result)
+            self.assertLess(len(application_name), 50)
+            mock_vnf_count_and_record.assert_called_once_with(
+                "vnf-level", "1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+            )
+            self.db.get_one.assert_called_once()
+
+    @patch(
+        "n2vc.n2vc_juju_conn.generate_random_alfanum_string",
+        **{"return_value": "random"}
+    )
+    def test_get_application_name_vnf_charm_old_naming(
+        self, mock_generate_random_alfanum
+    ):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {"member-vnf-index-ref": "vnf111-xxx-yyy-zzz"}
+        vnf_count = "0"
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        expected_result = "app-vnf-eb3161eec0-z0-random"
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            application_name = self.n2vc._get_application_name(namespace)
+            self.assertEqual(application_name, expected_result)
+            mock_vnf_count_and_record.assert_called_once_with(
+                "vnf-level", "1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+            )
+            self.db.get_one.assert_called_once()
+
+    def test_get_application_name_vnf_charm_vnf_index_ref_mismatch(self):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "38912ff7-5bdd-4228-911f-c2bee259c44a",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {"member-vnf-index-ref": "vnf222-xxx-yyy-zzz"}
+        vnf_count = "0"
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            with self.assertRaises(N2VCException):
+                self.n2vc._get_application_name(namespace)
+                mock_vnf_count_and_record.assert_called_once_with(
+                    "vnf-level", "1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+                )
+                self.db.get_one.assert_called_once()
+
+    def test_get_application_name_vdu_charm(self):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0.mgmtVM-0"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtvm",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "mgmtVM",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {
+            "member-vnf-index-ref": "vnf111-xxx-yyy-zzz",
+            "vdur": [
+                {"_id": "38912ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "mgmtVM"},
+                {"_id": "45512ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "dataVM"},
+            ],
+        }
+        vnf_count = "0"
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        expected_result = "simple-ee-ab-z0-vnf111-xxx-y-mgmtvm-z0-vdu"
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            application_name = self.n2vc._get_application_name(namespace)
+            self.assertEqual(application_name, expected_result)
+            self.assertLess(len(application_name), 50)
+            mock_vnf_count_and_record.assert_called_once_with(
+                "vdu-level", "1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+            )
+            self.db.get_one.assert_called_once()
+
+    def test_get_application_name_kdu_charm(self):
+        namespace = ".82b11965-e580-47c0-9ee0-329f318a305b.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0.ldap"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/openldap/kdu/ldap",
+                            "member-vnf-index": "openldap",
+                            "vdu_id": None,
+                            "kdu_name": "ldap",
+                            "vdu_count_index": 0,
+                            "operational-status": "init",
+                            "detailed-status": "",
+                            "step": "initial-deploy",
+                            "vnfd_id": "openldap_knf",
+                            "vdu_name": None,
+                            "type": "lxc_proxy_charm",
+                            "ee_descriptor_id": "openldap-ee",
+                            "charm_name": "",
+                            "ee_id": "",
+                            "application": "openldap-ee-z0-openldap-vdu",
+                            "model": "82b11965-e580-47c0-9ee0-329f318a305b",
+                            "config_sw_installed": True,
+                        }
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {"member-vnf-index-ref": "openldap", "vdur": {}}
+        vnf_count = "0"
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        expected_result = "openldap-ee-z0-openldap-ldap-vdu"
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            application_name = self.n2vc._get_application_name(namespace)
+            self.assertEqual(application_name, expected_result)
+            self.assertLess(len(application_name), 50)
+            mock_vnf_count_and_record.assert_called_once_with(
+                "vdu-level", "1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+            )
+            self.db.get_one.assert_called_once()
+
+    @patch(
+        "n2vc.n2vc_juju_conn.generate_random_alfanum_string",
+        **{"return_value": "random"}
+    )
+    def test_get_application_name_vdu_charm_old_naming(
+        self, mock_generate_random_alfanum
+    ):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898.1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0.mgmtVM-0"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "vnf/vnf1/mgmtVM",
+                            "member-vnf-index": "vnf111-xxx-yyy-zzz",
+                            "vdu_id": "mgmtVM",
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "r7fbd751-3de4-4e68-bd40-ec5ae0a53898",
+                            "vdu_name": "mgmtvm",
+                            "ee_descriptor_id": "simple-ee-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        },
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {
+            "member-vnf-index-ref": "vnf111-xxx-yyy-zzz",
+            "vdur": [
+                {"_id": "38912ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "mgmtVM"},
+                {"_id": "45512ff7-5bdd-4228-911f-c2bee259c44a", "vdu-id-ref": "dataVM"},
+            ],
+        }
+        vnf_count = "0"
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        expected_result = "app-vnf-eb3161eec0-z0-vdu-mgmtvm-cnt-z0-random"
+
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            application_name = self.n2vc._get_application_name(namespace)
+            self.assertEqual(application_name, expected_result)
+            self.assertLess(len(application_name), 50)
+            mock_vnf_count_and_record.assert_called_once_with(
+                "vdu-level", "1b6a4eb3-4fbf-415e-985c-4aeb3161eec0-0"
+            )
+            self.db.get_one.assert_called_once()
+
+    def test_get_application_name_ns_charm(self):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "charm_name": "simple-ns-charm-abc-000-rrrr-nnnn-4444-hhh-3333-yyyy-333-hhh-ttt-444",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        }
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {}
+        vnf_count = ""
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        expected_result = "simple-ns-charm-abc-z000-rrrr-nnnn-z4444-h-ns"
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            application_name = self.n2vc._get_application_name(namespace)
+            self.assertEqual(application_name, expected_result)
+            self.assertLess(len(application_name), 50)
+            mock_vnf_count_and_record.assert_called_once_with("ns-level", None)
+            self.db.get_one.assert_called_once()
+
+    def test_get_application_name_ns_charm_empty_charm_name(self):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "charm_name": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        }
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {}
+        vnf_count = ""
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            with self.assertRaises(N2VCException):
+                self.n2vc._get_application_name(namespace)
+                mock_vnf_count_and_record.assert_called_once_with("ns-level", None)
+                self.db.get_one.assert_called_once()
+
+    @patch(
+        "n2vc.n2vc_juju_conn.generate_random_alfanum_string",
+        **{"return_value": "random"}
+    )
+    def test_get_application_name_ns_charm_old_naming(
+        self, mock_generate_random_alfanum
+    ):
+        namespace = ".dbfbd751-3de4-4e68-bd40-ec5ae0a53898"
+        self.db.get_one.return_value = {
+            "_admin": {
+                "deployed": {
+                    "VCA": [
+                        {
+                            "target_element": "ns",
+                            "member-vnf-index": None,
+                            "vdu_id": None,
+                            "kdu_name": None,
+                            "vdu_count_index": None,
+                            "vnfd_id": "",
+                            "vdu_name": "",
+                            "ee_descriptor_id": "",
+                            "model": "dbfbd751-3de4-4e68-bd40-ec5ae0a53898",
+                        }
+                    ]
+                }
+            }
+        }
+        mock_vnf_count_and_record = MagicMock()
+        db_vnfr = {}
+        vnf_count = ""
+        mock_vnf_count_and_record.return_value = (vnf_count, db_vnfr)
+        expected_result = "app-random"
+        with patch.object(self.n2vc, "db", self.db), patch.object(
+            self.n2vc, "_get_vnf_count_and_record", mock_vnf_count_and_record
+        ):
+            application_name = self.n2vc._get_application_name(namespace)
+            self.assertEqual(application_name, expected_result)
+            self.assertLess(len(application_name), 50)
+            mock_vnf_count_and_record.assert_called_once_with("ns-level", None)
+            self.db.get_one.assert_called_once()
+
+
+class DeleteExecutionEnvironmentTest(N2VCJujuConnTestCase):
+    def setUp(self):
+        super(DeleteExecutionEnvironmentTest, self).setUp()
+        self.n2vc.libjuju.get_controller = AsyncMock()
+        self.n2vc.libjuju.destroy_model = AsyncMock()
+        self.n2vc.libjuju.destroy_application = AsyncMock()
+
+    def test_remove_ee__target_application_exists__model_is_deleted(self):
+        get_ee_id_components = MagicMock()
+        get_ee_id_components.return_value = ("my_model", "my_app", None)
+        model = MagicMock(create_autospec=True)
+        model.applications = {}
+        self.n2vc.libjuju.get_model = AsyncMock()
+        self.n2vc.libjuju.get_model.return_value = model
+        with patch.object(self.n2vc, "_get_ee_id_components", get_ee_id_components):
+            self.loop.run_until_complete(
+                self.n2vc.delete_execution_environment(
+                    "my_ee", application_to_delete="my_app"
+                )
+            )
+        self.n2vc.libjuju.destroy_application.assert_called_with(
+            model_name="my_model",
+            application_name="my_app",
+            total_timeout=None,
+        )
+        self.n2vc.libjuju.destroy_model.assert_called_with(
+            model_name="my_model",
+            total_timeout=None,
+        )
+
+    def test_remove_ee__multiple_applications_exist__model_is_not_deleted(self):
+        get_ee_id_components = MagicMock()
+        get_ee_id_components.return_value = ("my_model", "my_app", None)
+        model = MagicMock(create_autospec=True)
+        model.applications = {MagicMock(create_autospec=True)}
+        self.n2vc.libjuju.get_model = AsyncMock()
+        self.n2vc.libjuju.get_model.return_value = model
+        with patch.object(self.n2vc, "_get_ee_id_components", get_ee_id_components):
+            self.loop.run_until_complete(
+                self.n2vc.delete_execution_environment(
+                    "my_ee", application_to_delete="my_app"
+                )
+            )
+        self.n2vc.libjuju.destroy_application.assert_called_with(
+            model_name="my_model",
+            application_name="my_app",
+            total_timeout=None,
+        )
+        self.n2vc.libjuju.destroy_model.assert_not_called()
+
+    def test_remove_ee__target_application_does_not_exist__model_is_deleted(self):
+        get_ee_id_components = MagicMock()
+        get_ee_id_components.return_value = ("my_model", "my_app", None)
+        with patch.object(self.n2vc, "_get_ee_id_components", get_ee_id_components):
+            self.loop.run_until_complete(
+                self.n2vc.delete_execution_environment("my_ee")
+            )
+        self.n2vc.libjuju.destroy_model.assert_called_with(
+            model_name="my_model",
+            total_timeout=None,
+        )