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-rw-r--r--tests/config/test_workers.py288
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diff --git a/tests/config/test_workers.py b/tests/config/test_workers.py
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+# Copyright 2022 The Matrix.org Foundation C.I.C.
+#
+# 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.
+from typing import Any, Mapping, Optional
+from unittest.mock import Mock
+
+from frozendict import frozendict
+
+from synapse.config import ConfigError
+from synapse.config.workers import WorkerConfig
+
+from tests.unittest import TestCase
+
+_EMPTY_FROZENDICT: Mapping[str, Any] = frozendict()
+
+
+class WorkerDutyConfigTestCase(TestCase):
+    def _make_worker_config(
+        self,
+        worker_app: str,
+        worker_name: Optional[str],
+        extras: Mapping[str, Any] = _EMPTY_FROZENDICT,
+    ) -> WorkerConfig:
+        root_config = Mock()
+        root_config.worker_app = worker_app
+        root_config.worker_name = worker_name
+        worker_config = WorkerConfig(root_config)
+        worker_config_dict = {
+            "worker_name": worker_name,
+            "worker_app": worker_app,
+            **extras,
+        }
+        worker_config.read_config(worker_config_dict)
+        return worker_config
+
+    def test_old_configs_master(self) -> None:
+        """
+        Tests old (legacy) config options. This is for the master's config.
+        """
+        main_process_config = self._make_worker_config(
+            worker_app="synapse.app.homeserver", worker_name=None
+        )
+
+        self.assertTrue(
+            main_process_config._should_this_worker_perform_duty(
+                {},
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+        self.assertTrue(
+            main_process_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": True,
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+        self.assertFalse(
+            main_process_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": False,
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+    def test_old_configs_appservice_worker(self) -> None:
+        """
+        Tests old (legacy) config options. This is for the worker's config.
+        """
+        appservice_worker_config = self._make_worker_config(
+            worker_app="synapse.app.appservice",
+            worker_name="worker1",
+            extras={
+                # Set notify_appservices to false for the initialiser's config,
+                # so that it doesn't raise an exception here.
+                # (This is not read by `_should_this_worker_perform_duty`.)
+                "notify_appservices": False,
+            },
+        )
+
+        with self.assertRaises(ConfigError):
+            # This raises because you need to set notify_appservices: False
+            # before using the synapse.app.appservice worker type
+            self.assertFalse(
+                appservice_worker_config._should_this_worker_perform_duty(
+                    {},
+                    "notify_appservices",
+                    "synapse.app.appservice",
+                    "notify_appservices_from_worker",
+                )
+            )
+
+        with self.assertRaises(ConfigError):
+            # This also raises because you need to set notify_appservices: False
+            # before using the synapse.app.appservice worker type
+            appservice_worker_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": True,
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+
+        self.assertTrue(
+            appservice_worker_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": False,
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+    def test_transitional_configs_master(self) -> None:
+        """
+        Tests transitional (legacy + new) config options. This is for the master's config.
+        """
+
+        main_process_config = self._make_worker_config(
+            worker_app="synapse.app.homeserver", worker_name=None
+        )
+
+        self.assertTrue(
+            main_process_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": True,
+                    "notify_appservices_from_worker": "master",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+        self.assertFalse(
+            main_process_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": False,
+                    "notify_appservices_from_worker": "worker1",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+        with self.assertRaises(ConfigError):
+            # Contradictory because we say the master should notify appservices,
+            # then we say worker1 is the designated worker to do that!
+            main_process_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": True,
+                    "notify_appservices_from_worker": "worker1",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+
+        with self.assertRaises(ConfigError):
+            # Contradictory because we say the master shouldn't notify appservices,
+            # then we say master is the designated worker to do that!
+            main_process_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": False,
+                    "notify_appservices_from_worker": "master",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+
+    def test_transitional_configs_appservice_worker(self) -> None:
+        """
+        Tests transitional (legacy + new) config options. This is for the worker's config.
+        """
+        appservice_worker_config = self._make_worker_config(
+            worker_app="synapse.app.appservice",
+            worker_name="worker1",
+            extras={
+                # Set notify_appservices to false for the initialiser's config,
+                # so that it doesn't raise an exception here.
+                # (This is not read by `_should_this_worker_perform_duty`.)
+                "notify_appservices": False,
+            },
+        )
+
+        self.assertTrue(
+            appservice_worker_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": False,
+                    "notify_appservices_from_worker": "worker1",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+        with self.assertRaises(ConfigError):
+            # This raises because this worker is the appservice app type, yet
+            # another worker is the designated worker!
+            appservice_worker_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices": False,
+                    "notify_appservices_from_worker": "worker2",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+
+    def test_new_configs_master(self) -> None:
+        """
+        Tests new config options. This is for the master's config.
+        """
+        main_process_config = self._make_worker_config(
+            worker_app="synapse.app.homeserver", worker_name=None
+        )
+
+        self.assertTrue(
+            main_process_config._should_this_worker_perform_duty(
+                {"notify_appservices_from_worker": None},
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+        self.assertFalse(
+            main_process_config._should_this_worker_perform_duty(
+                {"notify_appservices_from_worker": "worker1"},
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+    def test_new_configs_appservice_worker(self) -> None:
+        """
+        Tests new config options. This is for the worker's config.
+        """
+        appservice_worker_config = self._make_worker_config(
+            worker_app="synapse.app.generic_worker", worker_name="worker1"
+        )
+
+        self.assertTrue(
+            appservice_worker_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices_from_worker": "worker1",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )
+
+        self.assertFalse(
+            appservice_worker_config._should_this_worker_perform_duty(
+                {
+                    "notify_appservices_from_worker": "worker2",
+                },
+                "notify_appservices",
+                "synapse.app.appservice",
+                "notify_appservices_from_worker",
+            )
+        )