installers/charm/osm-ro/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, OsmRoCharm, check_service_active
  30
  31 container_name = "ro"
  32 service_name = "ro"
  33
  34
  35 @pytest.fixture
  36 def harness(mocker: MockerFixture):
  37     mocker.patch("charm.KubernetesServicePatch", lambda x, y: None)
  38     harness = Harness(OsmRoCharm)
  39     harness.begin()
  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(relation in harness.charm.unit.status.message for relation in ["mongodb", "kafka"])
  48
  49
  50 def test_ready(harness: Harness):
  51     _add_relations(harness)
  52     assert harness.charm.unit.status == ActiveStatus()
  53
  54
  55 def test_container_stops_after_relation_broken(harness: Harness):
  56     harness.charm.on[container_name].pebble_ready.emit(container_name)
  57     container = harness.charm.unit.get_container(container_name)
  58     relation_ids = _add_relations(harness)
  59     check_service_active(container, service_name)
  60     harness.remove_relation(relation_ids[0])
  61     with pytest.raises(CharmError):
  62         check_service_active(container, service_name)
  63
  64
  65 def test_ro_relation_joined(harness: Harness):
  66     harness.set_leader(True)
  67     _add_relations(harness)
  68     relation_id = harness.add_relation("ro", "lcm")
  69     harness.add_relation_unit(relation_id, "lcm/0")
  70     relation_data = harness.get_relation_data(relation_id, harness.charm.app.name)
  71     assert harness.charm.unit.status == ActiveStatus()
  72     assert relation_data == {"host": harness.charm.app.name, "port": "9090"}
  73
  74
  75 def test_certificates(harness: Harness):
  76     # aGVsbG8K: "hello\n"
  77     # aGVsbG8gYWdhaW4K: "hello again\n"
  78     _add_relations(harness)
  79     harness.update_config({"certificates": "cert1:aGVsbG8K,cert2:aGVsbG8gYWdhaW4K"})
  80     for cert_name, content in {"cert1": "hello\n", "cert2": "hello again\n"}.items():
  81         assert harness.charm.container.exists(f"/certs/{cert_name}")
  82         assert harness.charm.container.pull(f"/certs/{cert_name}").read() == content
  83
  84
  85 def _add_relations(harness: Harness):
  86     relation_ids = []
  87     # Add mongo relation
  88     relation_id = harness.add_relation("mongodb", "mongodb")
  89     harness.add_relation_unit(relation_id, "mongodb/0")
  90     harness.update_relation_data(
  91         relation_id, "mongodb/0", {"connection_string": "mongodb://:1234"}
  92     )
  93     relation_ids.append(relation_id)
  94     # Add kafka relation
  95     relation_id = harness.add_relation("kafka", "kafka")
  96     harness.add_relation_unit(relation_id, "kafka/0")
  97     harness.update_relation_data(relation_id, "kafka", {"host": "kafka", "port": "9092"})
  98     relation_ids.append(relation_id)
  99     return relation_ids