--- /dev/null
+#!/usr/bin/env python3
+# Copyright 2022 Canonical Ltd.
+#
+# 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.
+#
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact: legal@canonical.com
+#
+# To get in touch with the maintainers, please contact:
+# osm-charmers@lists.launchpad.net
+#
+# Learn more about testing at: https://juju.is/docs/sdk/testing
+
+import pytest
+from ops.model import ActiveStatus, BlockedStatus
+from ops.testing import Harness
+from pytest_mock import MockerFixture
+
+from charm import CharmError, OsmLcmCharm, check_service_active
+
+container_name = "lcm"
+service_name = "lcm"
+
+
+@pytest.fixture
+def harness(mocker: MockerFixture):
+ harness = Harness(OsmLcmCharm)
+ harness.begin()
+ yield harness
+ harness.cleanup()
+
+
+def test_missing_relations(harness: Harness):
+ harness.charm.on.config_changed.emit()
+ assert type(harness.charm.unit.status) == BlockedStatus
+ assert all(
+ relation in harness.charm.unit.status.message for relation in ["mongodb", "kafka", "ro"]
+ )
+
+
+def test_ready(harness: Harness):
+ _add_relations(harness)
+ assert harness.charm.unit.status == ActiveStatus()
+
+
+def test_container_stops_after_relation_broken(harness: Harness):
+ harness.charm.on[container_name].pebble_ready.emit(container_name)
+ container = harness.charm.unit.get_container(container_name)
+ relation_ids = _add_relations(harness)
+ check_service_active(container, service_name)
+ harness.remove_relation(relation_ids[0])
+ with pytest.raises(CharmError):
+ check_service_active(container, service_name)
+
+
+def _add_relations(harness: Harness):
+ relation_ids = []
+ # Add mongo relation
+ relation_id = harness.add_relation("mongodb", "mongodb")
+ harness.add_relation_unit(relation_id, "mongodb/0")
+ harness.update_relation_data(
+ relation_id, "mongodb/0", {"connection_string": "mongodb://:1234"}
+ )
+ relation_ids.append(relation_id)
+ # Add kafka relation
+ relation_id = harness.add_relation("kafka", "kafka")
+ harness.add_relation_unit(relation_id, "kafka/0")
+ harness.update_relation_data(relation_id, "kafka", {"host": "kafka", "port": 9092})
+ relation_ids.append(relation_id)
+ # Add ro relation
+ relation_id = harness.add_relation("ro", "ro")
+ harness.add_relation_unit(relation_id, "ro/0")
+ harness.update_relation_data(relation_id, "ro", {"host": "ro", "port": 9090})
+ relation_ids.append(relation_id)
+ return relation_ids