+
+# class TestCharm(unittest.TestCase):
+# """MON Charm unit tests."""
+
+# def setUp(self) -> NoReturn:
+# """Test setup"""
+# self.harness = Harness(MonCharm)
+# self.harness.set_leader(is_leader=True)
+# self.harness.begin()
+
+# def test_on_start_without_relations(self) -> NoReturn:
+# """Test installation without any relation."""
+# self.harness.charm.on.start.emit()
+
+# # Verifying status
+# self.assertIsInstance(self.harness.charm.unit.status, BlockedStatus)
+
+# # Verifying status message
+# self.assertGreater(len(self.harness.charm.unit.status.message), 0)
+# self.assertTrue(
+# self.harness.charm.unit.status.message.startswith("Waiting for ")
+# )
+# self.assertIn("kafka", self.harness.charm.unit.status.message)
+# self.assertIn("mongodb", self.harness.charm.unit.status.message)
+# self.assertIn("prometheus", self.harness.charm.unit.status.message)
+# self.assertTrue(self.harness.charm.unit.status.message.endswith(" relations"))
+
+# def test_on_start_with_relations(self) -> NoReturn:
+# """Test deployment without keystone."""
+# expected_result = {
+# "version": 3,
+# "containers": [
+# {
+# "name": "mon",
+# "imageDetails": self.harness.charm.image.fetch(),
+# "imagePullPolicy": "Always",
+# "ports": [
+# {
+# "name": "mon",
+# "containerPort": 8000,
+# "protocol": "TCP",
+# }
+# ],
+# "envConfig": {
+# "ALLOW_ANONYMOUS_LOGIN": "yes",
+# "OSMMON_OPENSTACK_DEFAULT_GRANULARITY": 300,
+# "OSMMON_GLOBAL_REQUEST_TIMEOUT": 10,
+# "OSMMON_GLOBAL_LOGLEVEL": "INFO",
+# "OSMMON_COLLECTOR_INTERVAL": 30,
+# "OSMMON_EVALUATOR_INTERVAL": 30,
+# "OSMMON_MESSAGE_DRIVER": "kafka",
+# "OSMMON_MESSAGE_HOST": "kafka",
+# "OSMMON_MESSAGE_PORT": 9092,
+# "OSMMON_DATABASE_DRIVER": "mongo",
+# "OSMMON_DATABASE_URI": "mongodb://mongo:27017",
+# "OSMMON_DATABASE_COMMONKEY": "osm",
+# "OSMMON_PROMETHEUS_URL": "http://prometheus:9090",
+# "OSMMON_VCA_HOST": "admin",
+# "OSMMON_VCA_USER": "admin",
+# "OSMMON_VCA_SECRET": "secret",
+# "OSMMON_VCA_CACERT": "",
+# },
+# }
+# ],
+# "kubernetesResources": {"ingressResources": []},
+# }
+
+# self.harness.charm.on.start.emit()
+
+# # Check if kafka datastore is initialized
+# self.assertIsNone(self.harness.charm.state.message_host)
+# self.assertIsNone(self.harness.charm.state.message_port)
+
+# # Check if mongodb datastore is initialized
+# self.assertIsNone(self.harness.charm.state.database_uri)
+
+# # Check if prometheus datastore is initialized
+# self.assertIsNone(self.harness.charm.state.prometheus_host)
+# self.assertIsNone(self.harness.charm.state.prometheus_port)
+
+# # Initializing the kafka relation
+# kafka_relation_id = self.harness.add_relation("kafka", "kafka")
+# self.harness.add_relation_unit(kafka_relation_id, "kafka/0")
+# self.harness.update_relation_data(
+# kafka_relation_id, "kafka/0", {"host": "kafka", "port": 9092}
+# )
+
+# # Initializing the mongo relation
+# mongodb_relation_id = self.harness.add_relation("mongodb", "mongodb")
+# self.harness.add_relation_unit(mongodb_relation_id, "mongodb/0")
+# self.harness.update_relation_data(
+# mongodb_relation_id,
+# "mongodb/0",
+# {"connection_string": "mongodb://mongo:27017"},
+# )
+
+# # Initializing the prometheus relation
+# prometheus_relation_id = self.harness.add_relation("prometheus", "prometheus")
+# self.harness.add_relation_unit(prometheus_relation_id, "prometheus/0")
+# self.harness.update_relation_data(
+# prometheus_relation_id,
+# "prometheus",
+# {"hostname": "prometheus", "port": 9090},
+# )
+
+# # Checking if kafka data is stored
+# self.assertEqual(self.harness.charm.state.message_host, "kafka")
+# self.assertEqual(self.harness.charm.state.message_port, 9092)
+
+# # Checking if mongodb data is stored
+# self.assertEqual(self.harness.charm.state.database_uri, "mongodb://mongo:27017")
+
+# # Checking if prometheus data is stored
+# self.assertEqual(self.harness.charm.state.prometheus_host, "prometheus")
+# self.assertEqual(self.harness.charm.state.prometheus_port, 9090)
+
+# # Verifying status
+# self.assertNotIsInstance(self.harness.charm.unit.status, BlockedStatus)
+
+# pod_spec, _ = self.harness.get_pod_spec()
+
+# self.assertDictEqual(expected_result, pod_spec)
+
+# def test_on_kafka_unit_relation_changed(self) -> NoReturn:
+# """Test to see if kafka relation is updated."""
+# self.harness.charm.on.start.emit()
+
+# self.assertIsNone(self.harness.charm.state.message_host)
+# self.assertIsNone(self.harness.charm.state.message_port)
+
+# relation_id = self.harness.add_relation("kafka", "kafka")
+# self.harness.add_relation_unit(relation_id, "kafka/0")
+# self.harness.update_relation_data(
+# relation_id, "kafka/0", {"host": "kafka", "port": 9092}
+# )
+
+# self.assertEqual(self.harness.charm.state.message_host, "kafka")
+# self.assertEqual(self.harness.charm.state.message_port, 9092)
+
+# # Verifying status
+# self.assertIsInstance(self.harness.charm.unit.status, BlockedStatus)
+
+# # Verifying status message
+# self.assertGreater(len(self.harness.charm.unit.status.message), 0)
+# self.assertTrue(
+# self.harness.charm.unit.status.message.startswith("Waiting for ")
+# )
+# self.assertNotIn("kafka", self.harness.charm.unit.status.message)
+# self.assertIn("mongodb", self.harness.charm.unit.status.message)
+# self.assertIn("prometheus", self.harness.charm.unit.status.message)
+# self.assertTrue(self.harness.charm.unit.status.message.endswith(" relations"))
+
+# def test_on_mongodb_unit_relation_changed(self) -> NoReturn:
+# """Test to see if mongodb relation is updated."""
+# self.harness.charm.on.start.emit()
+
+# self.assertIsNone(self.harness.charm.state.database_uri)
+
+# relation_id = self.harness.add_relation("mongodb", "mongodb")
+# self.harness.add_relation_unit(relation_id, "mongodb/0")
+# self.harness.update_relation_data(
+# relation_id, "mongodb/0", {"connection_string": "mongodb://mongo:27017"}
+# )
+
+# self.assertEqual(self.harness.charm.state.database_uri, "mongodb://mongo:27017")
+
+# # Verifying status
+# self.assertIsInstance(self.harness.charm.unit.status, BlockedStatus)
+
+# # Verifying status message
+# self.assertGreater(len(self.harness.charm.unit.status.message), 0)
+# self.assertTrue(
+# self.harness.charm.unit.status.message.startswith("Waiting for ")
+# )
+# self.assertIn("kafka", self.harness.charm.unit.status.message)
+# self.assertNotIn("mongodb", self.harness.charm.unit.status.message)
+# self.assertIn("prometheus", self.harness.charm.unit.status.message)
+# self.assertTrue(self.harness.charm.unit.status.message.endswith(" relations"))
+
+# def test_on_prometheus_unit_relation_changed(self) -> NoReturn:
+# """Test to see if prometheus relation is updated."""
+# self.harness.charm.on.start.emit()
+
+# self.assertIsNone(self.harness.charm.state.prometheus_host)
+# self.assertIsNone(self.harness.charm.state.prometheus_port)
+
+# relation_id = self.harness.add_relation("prometheus", "prometheus")
+# self.harness.add_relation_unit(relation_id, "prometheus/0")
+# self.harness.update_relation_data(
+# relation_id, "prometheus", {"hostname": "prometheus", "port": 9090}
+# )
+
+# self.assertEqual(self.harness.charm.state.prometheus_host, "prometheus")
+# self.assertEqual(self.harness.charm.state.prometheus_port, 9090)
+
+# # Verifying status
+# self.assertIsInstance(self.harness.charm.unit.status, BlockedStatus)
+
+# # Verifying status message
+# self.assertGreater(len(self.harness.charm.unit.status.message), 0)
+# self.assertTrue(
+# self.harness.charm.unit.status.message.startswith("Waiting for ")
+# )
+# self.assertIn("kafka", self.harness.charm.unit.status.message)
+# self.assertIn("mongodb", self.harness.charm.unit.status.message)
+# self.assertNotIn("prometheus", self.harness.charm.unit.status.message)
+# self.assertTrue(self.harness.charm.unit.status.message.endswith(" relations"))