installers/charm/osm-lcm/tests/unit/test_charm.py

   1 #!/usr/bin/env python3
   2 # Copyright 2022 Canonical Ltd.
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   5 # not use this file except in compliance with the License. You may obtain
   6 # a copy of the License at
   7 #
   8 #         http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  12 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  13 # License for the specific language governing permissions and limitations
  14 # under the License.
  15 #
  16 # For those usages not covered by the Apache License, Version 2.0 please
  17 # contact: legal@canonical.com
  18 #
  19 # To get in touch with the maintainers, please contact:
  20 # osm-charmers@lists.launchpad.net
  21 #
  22 # Learn more about testing at: https://juju.is/docs/sdk/testing
  23
  24 import pytest
  25 from ops.model import ActiveStatus, BlockedStatus
  26 from ops.testing import Harness
  27 from pytest_mock import MockerFixture
  28
  29 from charm import CharmError, OsmLcmCharm, check_service_active
  30
  31 container_name = "lcm"
  32 service_name = "lcm"
  33
  34
  35 @pytest.fixture
  36 def harness(mocker: MockerFixture):
  37     harness = Harness(OsmLcmCharm)
  38     harness.begin()
  39     harness.container_pebble_ready(container_name)
  40     yield harness
  41     harness.cleanup()
  42
  43
  44 def test_missing_relations(harness: Harness):
  45     harness.charm.on.config_changed.emit()
  46     assert type(harness.charm.unit.status) == BlockedStatus
  47     assert all(
  48         relation in harness.charm.unit.status.message for relation in ["mongodb", "kafka", "ro"]
  49     )
  50
  51
  52 def test_ready(harness: Harness):
  53     _add_relations(harness)
  54     assert harness.charm.unit.status == ActiveStatus()
  55
  56
  57 def test_container_stops_after_relation_broken(harness: Harness):
  58     harness.charm.on[container_name].pebble_ready.emit(container_name)
  59     container = harness.charm.unit.get_container(container_name)
  60     relation_ids = _add_relations(harness)
  61     check_service_active(container, service_name)
  62     harness.remove_relation(relation_ids[0])
  63     with pytest.raises(CharmError):
  64         check_service_active(container, service_name)
  65
  66
  67 def _add_relations(harness: Harness):
  68     relation_ids = []
  69     # Add mongo relation
  70     relation_id = harness.add_relation("mongodb", "mongodb")
  71     harness.add_relation_unit(relation_id, "mongodb/0")
  72     harness.update_relation_data(
  73         relation_id,
  74         "mongodb",
  75         {"uris": "mongodb://:1234", "username": "user", "password": "password"},
  76     )
  77     relation_ids.append(relation_id)
  78     # Add kafka relation
  79     relation_id = harness.add_relation("kafka", "kafka")
  80     harness.add_relation_unit(relation_id, "kafka/0")
  81     harness.update_relation_data(relation_id, "kafka", {"host": "kafka", "port": "9092"})
  82     relation_ids.append(relation_id)
  83     # Add ro relation
  84     relation_id = harness.add_relation("ro", "ro")
  85     harness.add_relation_unit(relation_id, "ro/0")
  86     harness.update_relation_data(relation_id, "ro", {"host": "ro", "port": "9090"})
  87     relation_ids.append(relation_id)
  88     return relation_ids