Add Actor Mocks

dapr/actor/runtime/mock_actor.py

@@ -0,0 +1,122 @@
+"""
+Copyright 2023 The Dapr Authors
+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 __future__ import annotations
+
+from datetime import timedelta
+from typing import Any, Optional, TypeVar
+
+from dapr.actor.id import ActorId
+from dapr.actor.runtime._reminder_data import ActorReminderData
+from dapr.actor.runtime._timer_data import TIMER_CALLBACK, ActorTimerData
+from dapr.actor.runtime.actor import Actor
+from dapr.actor.runtime.mock_state_manager import MockStateManager
+
+
+class MockActor(Actor):
+    """A mock actor class to be used to override certain Actor methods for unit testing.
+        To be used only via the create_mock_actor function, which takes in a class and returns a
+        mock actor object for that class.
+
+    Examples:
+        class SomeActorInterface(ActorInterface):
+            @actor_method(name="method")
+            async def set_state(self, data: dict) -> None:
+
+        class SomeActor(Actor, SomeActorInterface):
+            async def set_state(self, data: dict) -> None:
+                await self._state_manager.set_state('state', data)
+                await self._state_manager.save_state()
+
+        mock_actor = create_mock_actor(SomeActor, "actor_1")
+        assert mock_actor._state_manager._mock_state == {}
+        await mock_actor.set_state({"test":10})
+        assert mock_actor._state_manager._mock_state == {"test":10}
+    """
+
+    def __init__(self, actor_id: str, initstate: Optional[dict]):
+        self.id = ActorId(actor_id)
+        self._runtime_ctx = None  # type: ignore
+        self._state_manager = MockStateManager(self, initstate)
+
+    async def register_timer(
+        self,
+        name: Optional[str],
+        callback: TIMER_CALLBACK,
+        state: Any,
+        due_time: timedelta,
+        period: timedelta,
+        ttl: Optional[timedelta] = None,
+    ) -> None:
+        """Adds actor timer to self._state_manager._mock_timers.
+        Args:
+            name (str): the name of the timer to register.
+            callback (Callable): An awaitable callable which will be called when the timer fires.
+            state (Any): An object which will pass to the callback method, or None.
+            due_time (datetime.timedelta): the amount of time to delay before the awaitable
+                callback is first invoked.
+            period (datetime.timedelta): the time interval between invocations
+                of the awaitable callback.
+            ttl (Optional[datetime.timedelta]): the time interval before the timer stops firing
+        """
+        name = name or self.__get_new_timer_name()
+        timer = ActorTimerData(name, callback, state, due_time, period, ttl)
+        self._state_manager._mock_timers[name] = timer  # type: ignore
+
+    async def unregister_timer(self, name: str) -> None:
+        """Unregisters actor timer from self._state_manager._mock_timers.
+
+        Args:
+            name (str): the name of the timer to unregister.
+        """
+        self._state_manager._mock_timers.pop(name, None)  # type: ignore
+
+    async def register_reminder(
+        self,
+        name: str,
+        state: bytes,
+        due_time: timedelta,
+        period: timedelta,
+        ttl: Optional[timedelta] = None,
+    ) -> None:
+        """Adds actor reminder to self._state_manager._mock_reminders.
+
+        Args:
+            name (str): the name of the reminder to register. the name must be unique per actor.
+            state (bytes): the user state passed to the reminder invocation.
+            due_time (datetime.timedelta): the amount of time to delay before invoking the reminder
+                for the first time.
+            period (datetime.timedelta): the time interval between reminder invocations after
+                the first invocation.
+            ttl (datetime.timedelta): the time interval before the reminder stops firing
+        """
+        reminder = ActorReminderData(name, state, due_time, period, ttl)
+        self._state_manager._mock_reminders[name] = reminder  # type: ignore
+
+    async def unregister_reminder(self, name: str) -> None:
+        """Unregisters actor reminder from self._state_manager._mock_reminders..
+
+        Args:
+            name (str): the name of the reminder to unregister.
+        """
+        self._state_manager._mock_reminders.pop(name, None)  # type: ignore
+
+
+T = TypeVar('T', bound=Actor)
+
+
+def create_mock_actor(cls1: type[T], actor_id: str, initstate: Optional[dict] = None) -> T:
+    class MockSuperClass(MockActor, cls1):  # type: ignore
+        pass
+
+    return MockSuperClass(actor_id, initstate)  # type: ignore

dapr/actor/runtime/mock_state_manager.py

@@ -0,0 +1,238 @@
+"""
+Copyright 2023 The Dapr Authors
+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.
+"""
+
+import asyncio
+from contextvars import ContextVar
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional, Tuple, TypeVar
+
+from dapr.actor.runtime._reminder_data import ActorReminderData
+from dapr.actor.runtime._timer_data import ActorTimerData
+from dapr.actor.runtime.state_change import ActorStateChange, StateChangeKind
+from dapr.actor.runtime.state_manager import ActorStateManager, StateMetadata
+
+if TYPE_CHECKING:
+    from dapr.actor.runtime.mock_actor import MockActor
+
+T = TypeVar('T')
+CONTEXT: ContextVar[Optional[Dict[str, Any]]] = ContextVar('state_tracker_context')
+
+
+class MockStateManager(ActorStateManager):
+    def __init__(self, actor: 'MockActor', initstate: Optional[dict]):
+        self._actor = actor
+        self._default_state_change_tracker: Dict[str, StateMetadata] = {}
+        self._mock_state: Dict[str, Any] = {}
+        self._mock_timers: Dict[str, ActorTimerData] = {}
+        self._mock_reminders: Dict[str, ActorReminderData] = {}
+        if initstate:
+            self._mock_state = initstate
+
+    async def add_state(self, state_name: str, value: T) -> None:
+        if not await self.try_add_state(state_name, value):
+            raise ValueError(f'The actor state name {state_name} already exist.')
+
+    async def try_add_state(self, state_name: str, value: T) -> bool:
+        if state_name in self._default_state_change_tracker:
+            state_metadata = self._default_state_change_tracker[state_name]
+            if state_metadata.change_kind == StateChangeKind.remove:
+                self._default_state_change_tracker[state_name] = StateMetadata(
+                    value, StateChangeKind.update
+                )
+                return True
+            return False
+        existed = state_name in self._mock_state
+        if existed:
+            return False
+        self._default_state_change_tracker[state_name] = StateMetadata(value, StateChangeKind.add)
+        self._mock_state[state_name] = value
+        return True
+
+    async def get_state(self, state_name: str) -> Optional[T]:
+        has_value, val = await self.try_get_state(state_name)
+        if has_value:
+            return val
+        else:
+            raise KeyError(f'Actor State with name {state_name} was not found.')
+
+    async def try_get_state(self, state_name: str) -> Tuple[bool, Optional[T]]:
+        if state_name in self._default_state_change_tracker:
+            state_metadata = self._default_state_change_tracker[state_name]
+            if state_metadata.change_kind == StateChangeKind.remove:
+                return False, None
+            return True, state_metadata.value
+        has_value = state_name in self._mock_state
+        val = self._mock_state.get(state_name)
+        if has_value:
+            self._default_state_change_tracker[state_name] = StateMetadata(
+                val, StateChangeKind.none
+            )
+        return has_value, val
+
+    async def set_state(self, state_name: str, value: T) -> None:
+        await self.set_state_ttl(state_name, value, None)
+
+    async def set_state_ttl(self, state_name: str, value: T, ttl_in_seconds: Optional[int]) -> None:
+        if ttl_in_seconds is not None and ttl_in_seconds < 0:
+            return
+
+        if state_name in self._default_state_change_tracker:
+            state_metadata = self._default_state_change_tracker[state_name]
+            state_metadata.value = value
+            state_metadata.ttl_in_seconds = ttl_in_seconds
+
+            if (
+                state_metadata.change_kind == StateChangeKind.none
+                or state_metadata.change_kind == StateChangeKind.remove
+            ):
+                state_metadata.change_kind = StateChangeKind.update
+            self._default_state_change_tracker[state_name] = state_metadata
+            self._mock_state[state_name] = value
+            return
+
+        existed = state_name in self._mock_state
+        if existed:
+            self._default_state_change_tracker[state_name] = StateMetadata(
+                value, StateChangeKind.update, ttl_in_seconds
+            )
+        else:
+            self._default_state_change_tracker[state_name] = StateMetadata(
+                value, StateChangeKind.add, ttl_in_seconds
+            )
+        self._mock_state[state_name] = value
+
+    async def remove_state(self, state_name: str) -> None:
+        if not await self.try_remove_state(state_name):
+            raise KeyError(f'Actor State with name {state_name} was not found.')
+
+    async def try_remove_state(self, state_name: str) -> bool:
+        if state_name in self._default_state_change_tracker:
+            state_metadata = self._default_state_change_tracker[state_name]
+            if state_metadata.change_kind == StateChangeKind.remove:
+                return False
+            elif state_metadata.change_kind == StateChangeKind.add:
+                self._default_state_change_tracker.pop(state_name, None)
+                self._mock_state.pop(state_name, None)
+                return True
+            self._mock_state.pop(state_name, None)
+            state_metadata.change_kind = StateChangeKind.remove
+            return True
+
+        existed = state_name in self._mock_state
+        if existed:
+            self._default_state_change_tracker[state_name] = StateMetadata(
+                None, StateChangeKind.remove
+            )
+            self._mock_state.pop(state_name, None)
+            return True
+        return False
+
+    async def contains_state(self, state_name: str) -> bool:
+        if state_name in self._default_state_change_tracker:
+            state_metadata = self._default_state_change_tracker[state_name]
+            return state_metadata.change_kind != StateChangeKind.remove
+        return state_name in self._mock_state
+
+    async def get_or_add_state(self, state_name: str, value: T) -> Optional[T]:
+        has_value, val = await self.try_get_state(state_name)
+        if has_value:
+            return val
+        change_kind = (
+            StateChangeKind.update
+            if self.is_state_marked_for_remove(state_name)
+            else StateChangeKind.add
+        )
+        self._mock_state[state_name] = value
+        self._default_state_change_tracker[state_name] = StateMetadata(value, change_kind)
+        return value
+
+    async def add_or_update_state(
+        self, state_name: str, value: T, update_value_factory: Callable[[str, T], T]
+    ) -> T:
+        if not callable(update_value_factory):
+            raise AttributeError('update_value_factory is not callable')
+
+        if state_name in self._default_state_change_tracker:
+            state_metadata = self._default_state_change_tracker[state_name]
+            if state_metadata.change_kind == StateChangeKind.remove:
+                self._default_state_change_tracker[state_name] = StateMetadata(
+                    value, StateChangeKind.update
+                )
+                self._mock_state[state_name] = value
+                return value
+            new_value = update_value_factory(state_name, state_metadata.value)
+            state_metadata.value = new_value
+            if state_metadata.change_kind == StateChangeKind.none:
+                state_metadata.change_kind = StateChangeKind.update
+            self._default_state_change_tracker[state_name] = state_metadata
+            self._mock_state[state_name] = new_value
+            return new_value
+
+        has_value = state_name in self._mock_state
+        val: Any = self._mock_state.get(state_name)
+        if has_value:
+            new_value = update_value_factory(state_name, val)
+            self._default_state_change_tracker[state_name] = StateMetadata(
+                new_value, StateChangeKind.update
+            )
+            self._mock_state[state_name] = new_value
+            return new_value
+        self._default_state_change_tracker[state_name] = StateMetadata(value, StateChangeKind.add)
+        self._mock_state[state_name] = value
+        return value
+
+    async def get_state_names(self) -> List[str]:
+        # TODO: Get all state names from Dapr once implemented.
+        def append_names_sync():
+            state_names = []
+            for key, value in self._default_state_change_tracker.items():
+                if value.change_kind == StateChangeKind.add:
+                    state_names.append(key)
+                elif value.change_kind == StateChangeKind.remove:
+                    state_names.append(key)
+            return state_names
+
+        default_loop = asyncio.get_running_loop()
+        return await default_loop.run_in_executor(None, append_names_sync)
+
+    async def clear_cache(self) -> None:
+        self._default_state_change_tracker.clear()
+
+    async def save_state(self) -> None:
+        if len(self._default_state_change_tracker) == 0:
+            return
+
+        state_changes = []
+        states_to_remove = []
+        for state_name, state_metadata in self._default_state_change_tracker.items():
+            if state_metadata.change_kind == StateChangeKind.none:
+                continue
+            state_changes.append(
+                ActorStateChange(
+                    state_name,
+                    state_metadata.value,
+                    state_metadata.change_kind,
+                    state_metadata.ttl_in_seconds,
+                )
+            )
+            if state_metadata.change_kind == StateChangeKind.remove:
+                states_to_remove.append(state_name)
+            # Mark the states as unmodified so that tracking for next invocation is done correctly.
+            state_metadata.change_kind = StateChangeKind.none
+        for state_name in states_to_remove:
+            self._default_state_change_tracker.pop(state_name, None)
+
+    def is_state_marked_for_remove(self, state_name: str) -> bool:
+        return (
+            state_name in self._default_state_change_tracker
+            and self._default_state_change_tracker[state_name].change_kind == StateChangeKind.remove
+        )

dapr/actor/runtime/state_manager.py

@@ -15,11 +15,10 @@
 
 import asyncio
 from contextvars import ContextVar
+from typing import TYPE_CHECKING, Any, Callable, Dict, Generic, List, Optional, Tuple, TypeVar
 
-from dapr.actor.runtime.state_change import StateChangeKind, ActorStateChange
 from dapr.actor.runtime.reentrancy_context import reentrancy_ctx
-
-from typing import Any, Callable, Dict, Generic, List, Tuple, TypeVar, Optional, TYPE_CHECKING
+from dapr.actor.runtime.state_change import ActorStateChange, StateChangeKind
 
 if TYPE_CHECKING:
     from dapr.actor.runtime.actor import Actor