task: Annotate core functions (#1548)

direct/src/showbase/ShowBase.py

@@ -3421,7 +3421,7 @@ class ShowBase(DirectObject.DirectObject):
         # Set fWantTk to 0 to avoid starting Tk with this call
         self.startDirect(fWantDirect = fDirect, fWantTk = fTk, fWantWx = fWx)
 
-    def run(self): # pylint: disable=method-hidden
+    def run(self) -> None: # pylint: disable=method-hidden
         """This method runs the :class:`~direct.task.Task.TaskManager`
         when ``self.appRunner is None``, which is to say, when we are
         not running from within a p3d file.  When we *are* within a p3d

direct/src/task/Task.py

@@ -6,6 +6,8 @@ For more information about the task system, consult the
 :ref:`tasks-and-event-handling` page in the programming manual.
 """
 
+from __future__ import annotations
+
 __all__ = ['Task', 'TaskManager',
            'cont', 'done', 'again', 'pickup', 'exit',
            'sequence', 'loop', 'pause']
@@ -13,7 +15,7 @@ __all__ = ['Task', 'TaskManager',
 from direct.directnotify.DirectNotifyGlobal import directNotify
 from direct.showbase.PythonUtil import Functor, ScratchPad
 from direct.showbase.MessengerGlobal import messenger
-from typing import Any, Optional
+from typing import Any, Callable, Coroutine, Final, Generator, Sequence, TypeVar, Union
 import types
 import random
 import importlib
@@ -21,7 +23,7 @@ import sys
 
 # On Android, there's no use handling SIGINT, and in fact we can't, since we
 # run the application in a separate thread from the main thread.
-signal: Optional[types.ModuleType]
+signal: types.ModuleType | None
 if hasattr(sys, 'getandroidapilevel'):
     signal = None
 else:
@@ -43,8 +45,15 @@ from panda3d.core import (
 )
 from direct.extensions_native import HTTPChannel_extensions # pylint: disable=unused-import
 
+# The following variables are typing constructs used in annotations
+# to succinctly express all the types that can be converted into tasks.
+_T = TypeVar('_T', covariant=True)
+_TaskCoroutine = Union[Coroutine[Any, None, _T], Generator[Any, None, _T]]
+_TaskFunction = Callable[..., Union[int, _TaskCoroutine[Union[int, None]], None]]
+_FuncOrTask = Union[_TaskFunction, _TaskCoroutine[Any], AsyncTask]
 
-def print_exc_plus():
+
+def print_exc_plus() -> None:
     """
     Print the usual traceback information, followed by a listing of all the
     local variables in each frame.
@@ -52,12 +61,13 @@ def print_exc_plus():
     import traceback
 
     tb = sys.exc_info()[2]
+    assert tb is not None
     while 1:
         if not tb.tb_next:
             break
         tb = tb.tb_next
     stack = []
-    f = tb.tb_frame
+    f: types.FrameType | None = tb.tb_frame
     while f:
         stack.append(f)
         f = f.f_back
@@ -84,11 +94,11 @@ def print_exc_plus():
 # these Python names, and define them both at the module level, here,
 # and at the class level (below).  The preferred access is via the
 # class level.
-done = AsyncTask.DSDone
+done: Final = AsyncTask.DSDone
-cont = AsyncTask.DSCont
+cont: Final = AsyncTask.DSCont
-again = AsyncTask.DSAgain
+again: Final = AsyncTask.DSAgain
-pickup = AsyncTask.DSPickup
+pickup: Final = AsyncTask.DSPickup
-exit = AsyncTask.DSExit
+exit: Final = AsyncTask.DSExit
 
 #: Task aliases to :class:`panda3d.core.PythonTask` for historical purposes.
 Task = PythonTask
@@ -112,7 +122,7 @@ gather = Task.gather
 shield = Task.shield
 
 
-def sequence(*taskList):
+def sequence(*taskList: AsyncTask) -> AsyncTaskSequence:
     seq = AsyncTaskSequence('sequence')
     for task in taskList:
         seq.addTask(task)
@@ -122,7 +132,7 @@ def sequence(*taskList):
 Task.DtoolClassDict['sequence'] = staticmethod(sequence)
 
 
-def loop(*taskList):
+def loop(*taskList: AsyncTask) -> AsyncTaskSequence:
     seq = AsyncTaskSequence('loop')
     for task in taskList:
         seq.addTask(task)
@@ -144,10 +154,10 @@ class TaskManager:
 
     __prevHandler: Any
 
-    def __init__(self):
+    def __init__(self) -> None:
         self.mgr = AsyncTaskManager.getGlobalPtr()
 
-        self.resumeFunc = None
+        self.resumeFunc: Callable[[], object] | None = None
         self.globalClock = self.mgr.getClock()
         self.stepping = False
         self.running = False
@@ -157,12 +167,12 @@ class TaskManager:
         if signal:
             self.__prevHandler = signal.default_int_handler
 
-        self._frameProfileQueue = []
+        self._frameProfileQueue: list[tuple[int, Any, Callable[[], object] | None]] = []
 
         # this will be set when it's safe to import StateVar
-        self._profileFrames = None
+        self._profileFrames: Any = None
         self._frameProfiler = None
-        self._profileTasks = None
+        self._profileTasks: Any = None
         self._taskProfiler = None
         self._taskProfileInfo = ScratchPad(
             taskId = None,
@@ -170,7 +180,7 @@ class TaskManager:
             session = None,
         )
 
-    def finalInit(self):
+    def finalInit(self) -> None:
         # This function should be called once during startup, after
         # most things are imported.
         from direct.fsm.StatePush import StateVar
@@ -179,7 +189,7 @@ class TaskManager:
         self._profileFrames = StateVar(False)
         self.setProfileFrames(ConfigVariableBool('profile-frames', 0).getValue())
 
-    def destroy(self):
+    def destroy(self) -> None:
         # This should be safe to call multiple times.
         self.running = False
         self.notify.info("TaskManager.destroy()")
@@ -187,10 +197,10 @@ class TaskManager:
         self._frameProfileQueue.clear()
         self.mgr.cleanup()
 
-    def __getClock(self):
+    def __getClock(self) -> ClockObject:
         return self.mgr.getClock()
 
-    def setClock(self, clockObject):
+    def setClock(self, clockObject: ClockObject) -> None:
         self.mgr.setClock(clockObject)
         self.globalClock = clockObject
 
@@ -215,13 +225,13 @@ class TaskManager:
             # Next time around invoke the default handler
             signal.signal(signal.SIGINT, self.invokeDefaultHandler)
 
-    def getCurrentTask(self):
+    def getCurrentTask(self) -> AsyncTask | None:
         """ Returns the task currently executing on this thread, or
         None if this is being called outside of the task manager. """
 
         return Thread.getCurrentThread().getCurrentTask()
 
-    def hasTaskChain(self, chainName):
+    def hasTaskChain(self, chainName: str) -> bool:
         """ Returns true if a task chain with the indicated name has
         already been defined, or false otherwise.  Note that
         setupTaskChain() will implicitly define a task chain if it has
@@ -231,9 +241,16 @@ class TaskManager:
 
         return self.mgr.findTaskChain(chainName) is not None
 
-    def setupTaskChain(self, chainName, numThreads = None, tickClock = None,
+    def setupTaskChain(
-                       threadPriority = None, frameBudget = None,
+        self,
-                       frameSync = None, timeslicePriority = None):
+        chainName: str,
+        numThreads: int | None = None,
+        tickClock: bool | None = None,
+        threadPriority: int | None = None,
+        frameBudget: float | None = None,
+        frameSync: bool | None = None,
+        timeslicePriority: bool | None = None,
+    ) -> None:
         """Defines a new task chain.  Each task chain executes tasks
         potentially in parallel with all of the other task chains (if
         numThreads is more than zero).  When a new task is created, it
@@ -297,40 +314,50 @@ class TaskManager:
         if timeslicePriority is not None:
             chain.setTimeslicePriority(timeslicePriority)
 
-    def hasTaskNamed(self, taskName):
+    def hasTaskNamed(self, taskName: str) -> bool:
         """Returns true if there is at least one task, active or
         sleeping, with the indicated name. """
 
         return bool(self.mgr.findTask(taskName))
 
-    def getTasksNamed(self, taskName):
+    def getTasksNamed(self, taskName: str) -> list[AsyncTask]:
         """Returns a list of all tasks, active or sleeping, with the
         indicated name. """
         return list(self.mgr.findTasks(taskName))
 
-    def getTasksMatching(self, taskPattern):
+    def getTasksMatching(self, taskPattern: GlobPattern | str) -> list[AsyncTask]:
         """Returns a list of all tasks, active or sleeping, with a
         name that matches the pattern, which can include standard
         shell globbing characters like \\*, ?, and []. """
 
         return list(self.mgr.findTasksMatching(GlobPattern(taskPattern)))
 
-    def getAllTasks(self):
+    def getAllTasks(self) -> list[AsyncTask]:
         """Returns list of all tasks, active and sleeping, in
         arbitrary order. """
         return list(self.mgr.getTasks())
 
-    def getTasks(self):
+    def getTasks(self) -> list[AsyncTask]:
         """Returns list of all active tasks in arbitrary order. """
         return list(self.mgr.getActiveTasks())
 
-    def getDoLaters(self):
+    def getDoLaters(self) -> list[AsyncTask]:
         """Returns list of all sleeping tasks in arbitrary order. """
         return list(self.mgr.getSleepingTasks())
 
-    def doMethodLater(self, delayTime, funcOrTask, name, extraArgs = None,
+    def doMethodLater(
-                      sort = None, priority = None, taskChain = None,
+        self,
-                      uponDeath = None, appendTask = False, owner = None):
+        delayTime: float,
+        funcOrTask: _FuncOrTask,
+        name: str | None,
+        extraArgs: Sequence | None = None,
+        sort: int | None = None,
+        priority: int | None = None,
+        taskChain: str | None = None,
+        uponDeath: Callable[[], object] | None = None,
+        appendTask: bool = False,
+        owner = None,
+    ) -> AsyncTask:
         """Adds a task to be performed at some time in the future.
         This is identical to `add()`, except that the specified
         delayTime is applied to the Task object first, which means
@@ -353,9 +380,19 @@ class TaskManager:
 
     do_method_later = doMethodLater
 
-    def add(self, funcOrTask, name = None, sort = None, extraArgs = None,
+    def add(
-            priority = None, uponDeath = None, appendTask = False,
+        self,
-            taskChain = None, owner = None, delay = None):
+        funcOrTask: _FuncOrTask,
+        name: str | None = None,
+        sort: int | None = None,
+        extraArgs: Sequence | None = None,
+        priority: int | None = None,
+        uponDeath: Callable[[], object] | None = None,
+        appendTask: bool = False,
+        taskChain: str | None = None,
+        owner = None,
+        delay: float | None = None,
+    ) -> AsyncTask:
         """
         Add a new task to the taskMgr.  The task will begin executing
         immediately, or next frame if its sort value has already
@@ -422,7 +459,18 @@ class TaskManager:
         self.mgr.add(task)
         return task
 
-    def __setupTask(self, funcOrTask, name, priority, sort, extraArgs, taskChain, appendTask, owner, uponDeath):
+    def __setupTask(
+        self,
+        funcOrTask: _FuncOrTask,
+        name: str | None,
+        priority: int | None,
+        sort: int | None,
+        extraArgs: Sequence | None,
+        taskChain: str | None,
+        appendTask: bool,
+        owner,
+        uponDeath: Callable[[], object] | None,
+    ) -> AsyncTask:
         wasTask = False
         if isinstance(funcOrTask, AsyncTask):
             task = funcOrTask
@@ -480,7 +528,7 @@ class TaskManager:
 
         return task
 
-    def remove(self, taskOrName):
+    def remove(self, taskOrName: AsyncTask | str | list[AsyncTask | str]) -> int:
         """Removes a task from the task manager.  The task is stopped,
         almost as if it had returned task.done.  (But if the task is
         currently executing, it will finish out its current frame
@@ -492,13 +540,15 @@ class TaskManager:
         if isinstance(taskOrName, AsyncTask):
             return self.mgr.remove(taskOrName)
         elif isinstance(taskOrName, list):
+            count = 0
             for task in taskOrName:
-                self.remove(task)
+                count += self.remove(task)
+            return count
         else:
             tasks = self.mgr.findTasks(taskOrName)
             return self.mgr.remove(tasks)
 
-    def removeTasksMatching(self, taskPattern):
+    def removeTasksMatching(self, taskPattern: GlobPattern | str) -> int:
         """Removes all tasks whose names match the pattern, which can
         include standard shell globbing characters like \\*, ?, and [].
         See also :meth:`remove()`.
@@ -508,7 +558,7 @@ class TaskManager:
         tasks = self.mgr.findTasksMatching(GlobPattern(taskPattern))
         return self.mgr.remove(tasks)
 
-    def step(self):
+    def step(self) -> None:
         """Invokes the task manager for one frame, and then returns.
         Normally, this executes each task exactly once, though task
         chains that are in sub-threads or that have frame budgets
@@ -519,7 +569,7 @@ class TaskManager:
         # Replace keyboard interrupt handler during task list processing
         # so we catch the keyboard interrupt but don't handle it until
         # after task list processing is complete.
-        self.fKeyboardInterrupt = 0
+        self.fKeyboardInterrupt = False
         self.interruptCount = 0
 
         if signal:
@@ -541,7 +591,7 @@ class TaskManager:
         if self.fKeyboardInterrupt:
             raise KeyboardInterrupt
 
-    def run(self):
+    def run(self) -> None:
         """Starts the task manager running.  Does not return until an
         exception is encountered (including KeyboardInterrupt). """
 
@@ -567,11 +617,11 @@ class TaskManager:
                     if len(self._frameProfileQueue) > 0:
                         numFrames, session, callback = self._frameProfileQueue.pop(0)
 
-                        def _profileFunc(numFrames=numFrames):
+                        def _profileFunc(numFrames: int = numFrames) -> None:
                             self._doProfiledFrames(numFrames)
                         session.setFunc(_profileFunc)
                         session.run()
-                        _profileFunc = None
+                        del _profileFunc
                         if callback:
                             callback()
                         session.release()
@@ -624,7 +674,7 @@ class TaskManager:
             message = ioError
         return code, message
 
-    def stop(self):
+    def stop(self) -> None:
         # Set a flag so we will stop before beginning next frame
         self.running = False
 
@@ -789,12 +839,12 @@ class TaskManager:
             task = tasks.getTask(i)
         return task
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         return str(self.mgr)
 
     # In the event we want to do frame time managment, this is the
     # function to replace or overload.
-    def doYield(self, frameStartTime, nextScheduledTaskTime):
+    def doYield(self, frameStartTime: float, nextScheduledTaskTime: float) -> None:
         pass
 
     #def doYieldExample(self, frameStartTime, nextScheduledTaskTime):

tests/task/test_Task.py

@@ -1,22 +1,82 @@
+import pytest
 from panda3d import core
 from direct.task import Task
 
 
-def test_TaskManager():
+TASK_NAME = 'Arbitrary task name'
-    tm = Task.TaskManager()
+TASK_CHAIN_NAME = 'Arbitrary task chain name'
-    tm.mgr = core.AsyncTaskManager("Test manager")
-    tm.setClock(core.ClockObject())
-    tm.setupTaskChain("default", tickClock = True)
 
-    tm._startTrackingMemLeaks = lambda: None
-    tm._stopTrackingMemLeaks = lambda: None
-    tm._checkMemLeaks = lambda: None
 
-    # check for memory leaks after every test
+def DUMMY_FUNCTION(*_):
-    tm._startTrackingMemLeaks()
+    pass
-    tm._checkMemLeaks()
 
+
+@pytest.fixture
+def task_manager():
+    manager = Task.TaskManager()
+    manager.mgr = core.AsyncTaskManager('Test manager')
+    manager.clock = core.ClockObject()
+    manager.setupTaskChain('default', tickClock=True)
+    manager.finalInit()
+    yield manager
+    manager.destroy()
+
+
+def test_sequence(task_manager):
+    numbers = []
+
+    def append_1(task):
+        numbers.append(1)
+
+    def append_2(task):
+        numbers.append(2)
+
+    sequence = Task.sequence(core.PythonTask(append_1), core.PythonTask(append_2))
+    task_manager.add(sequence)
+    for _ in range(3):
+        task_manager.step()
+    assert not task_manager.getTasks()
+    assert numbers == [1, 2]
+
+
+def test_loop(task_manager):
+    numbers = []
+
+    def append_1(task):
+        numbers.append(1)
+
+    def append_2(task):
+        numbers.append(2)
+
+    loop = Task.loop(core.PythonTask(append_1), core.PythonTask(append_2))
+    task_manager.add(loop)
+    for _ in range(5):
+        task_manager.step()
+    assert numbers == [1, 2, 1, 2]
+
+
+def test_get_current_task(task_manager):
+    def check_current_task(task):
+        assert task_manager.getCurrentTask().name == TASK_NAME
+
+    task_manager.add(check_current_task, TASK_NAME)
+    assert len(task_manager.getTasks()) == 1
+    assert task_manager.getCurrentTask() is None
+
+    task_manager.step()
+    assert len(task_manager.getTasks()) == 0
+    assert task_manager.getCurrentTask() is None
+
+
+def test_has_task_chain(task_manager):
+    assert not task_manager.hasTaskChain(TASK_CHAIN_NAME)
+    task_manager.setupTaskChain(TASK_CHAIN_NAME)
+    assert task_manager.hasTaskChain(TASK_CHAIN_NAME)
+
+
+def test_done(task_manager):
     # run-once task
+    tm = task_manager
     l = []
 
     def _testDone(task, l=l):
@@ -27,28 +87,31 @@ def test_TaskManager():
     assert len(l) == 1
     tm.step()
     assert len(l) == 1
-    _testDone = None
-    tm._checkMemLeaks()
 
+
+def test_remove_by_name(task_manager):
     # remove by name
+    tm = task_manager
     def _testRemoveByName(task):
         return task.done
     tm.add(_testRemoveByName, 'testRemoveByName')
     assert tm.remove('testRemoveByName') == 1
     assert tm.remove('testRemoveByName') == 0
-    _testRemoveByName = None
-    tm._checkMemLeaks()
 
+
+def test_duplicate_named_tasks(task_manager):
     # duplicate named tasks
+    tm = task_manager
     def _testDupNamedTasks(task):
         return task.done
     tm.add(_testDupNamedTasks, 'testDupNamedTasks')
     tm.add(_testDupNamedTasks, 'testDupNamedTasks')
     assert tm.remove('testRemoveByName') == 0
-    _testDupNamedTasks = None
-    tm._checkMemLeaks()
 
+
+def test_continued_task(task_manager):
     # continued task
+    tm = task_manager
     l = []
 
     def _testCont(task, l = l):
@@ -60,10 +123,11 @@ def test_TaskManager():
     tm.step()
     assert len(l) == 2
     tm.remove('testCont')
-    _testCont = None
-    tm._checkMemLeaks()
 
+
+def test_continue_until_done(task_manager):
     # continue until done task
+    tm = task_manager
     l = []
 
     def _testContDone(task, l = l):
@@ -80,20 +144,22 @@ def test_TaskManager():
     tm.step()
     assert len(l) == 2
     assert not tm.hasTaskNamed('testContDone')
-    _testContDone = None
-    tm._checkMemLeaks()
 
+
+def test_has_task_named(task_manager):
     # hasTaskNamed
+    tm = task_manager
     def _testHasTaskNamed(task):
         return task.done
     tm.add(_testHasTaskNamed, 'testHasTaskNamed')
     assert tm.hasTaskNamed('testHasTaskNamed')
     tm.step()
     assert not tm.hasTaskNamed('testHasTaskNamed')
-    _testHasTaskNamed = None
-    tm._checkMemLeaks()
 
+
+def test_task_sort(task_manager):
     # task sort
+    tm = task_manager
     l = []
 
     def _testPri1(task, l = l):
@@ -113,11 +179,11 @@ def test_TaskManager():
     assert l == [1, 2, 1, 2,]
     tm.remove('testPri1')
     tm.remove('testPri2')
-    _testPri1 = None
-    _testPri2 = None
-    tm._checkMemLeaks()
 
+
+def test_extra_args(task_manager):
     # task extraArgs
+    tm = task_manager
     l = []
 
     def _testExtraArgs(arg1, arg2, l=l):
@@ -127,10 +193,11 @@ def test_TaskManager():
     tm.step()
     assert len(l) == 2
     assert l == [4, 5,]
-    _testExtraArgs = None
-    tm._checkMemLeaks()
 
+
+def test_append_task(task_manager):
     # task appendTask
+    tm = task_manager
     l = []
 
     def _testAppendTask(arg1, arg2, task, l=l):
@@ -140,10 +207,11 @@ def test_TaskManager():
     tm.step()
     assert len(l) == 2
     assert l == [4, 5,]
-    _testAppendTask = None
-    tm._checkMemLeaks()
 
+
+def test_task_upon_death(task_manager):
     # task uponDeath
+    tm = task_manager
     l = []
 
     def _uponDeathFunc(task, l=l):
@@ -155,11 +223,11 @@ def test_TaskManager():
     tm.step()
     assert len(l) == 1
     assert l == ['testUponDeath']
-    _testUponDeath = None
-    _uponDeathFunc = None
-    tm._checkMemLeaks()
 
+
+def test_task_owner(task_manager):
     # task owner
+    tm = task_manager
     class _TaskOwner:
         def _addTask(self, task):
             self.addedTaskName = task.name
@@ -175,11 +243,10 @@ def test_TaskManager():
     tm.step()
     assert getattr(to, 'addedTaskName', None) == 'testOwner'
     assert getattr(to, 'clearedTaskName', None) == 'testOwner'
-    _testOwner = None
-    del to
-    _TaskOwner = None
-    tm._checkMemLeaks()
 
+
+def test_do_laters(task_manager):
+    tm = task_manager
     doLaterTests = [0,]
 
     # doLater
@@ -205,8 +272,6 @@ def test_TaskManager():
     _testDoLater1 = None
     _testDoLater2 = None
     _monitorDoLater = None
-    # don't check until all the doLaters are finished
-    #tm._checkMemLeaks()
 
     # doLater sort
     l = []
@@ -231,8 +296,6 @@ def test_TaskManager():
     _testDoLaterPri1 = None
     _testDoLaterPri2 = None
     _monitorDoLaterPri = None
-    # don't check until all the doLaters are finished
-    #tm._checkMemLeaks()
 
     # doLater extraArgs
     l = []
@@ -252,8 +315,6 @@ def test_TaskManager():
     tm.add(_monitorDoLaterExtraArgs, 'monitorDoLaterExtraArgs', sort=10)
     _testDoLaterExtraArgs = None
     _monitorDoLaterExtraArgs = None
-    # don't check until all the doLaters are finished
-    #tm._checkMemLeaks()
 
     # doLater appendTask
     l = []
@@ -275,8 +336,6 @@ def test_TaskManager():
     tm.add(_monitorDoLaterAppendTask, 'monitorDoLaterAppendTask', sort=10)
     _testDoLaterAppendTask = None
     _monitorDoLaterAppendTask = None
-    # don't check until all the doLaters are finished
-    #tm._checkMemLeaks()
 
     # doLater uponDeath
     l = []
@@ -302,8 +361,6 @@ def test_TaskManager():
     _testUponDeathFunc = None
     _testDoLaterUponDeath = None
     _monitorDoLaterUponDeath = None
-    # don't check until all the doLaters are finished
-    #tm._checkMemLeaks()
 
     # doLater owner
     class _DoLaterOwner:
@@ -335,15 +392,15 @@ def test_TaskManager():
     _monitorDoLaterOwner = None
     del doLaterOwner
     _DoLaterOwner = None
-    # don't check until all the doLaters are finished
-    #tm._checkMemLeaks()
 
     # run the doLater tests
     while doLaterTests[0] > 0:
         tm.step()
     del doLaterTests
-    tm._checkMemLeaks()
 
+
+def test_get_tasks(task_manager):
+    tm = task_manager
     # getTasks
     def _testGetTasks(task):
         return task.cont
@@ -361,9 +418,10 @@ def test_TaskManager():
     tm.remove('testGetTasks1')
     tm.remove('testGetTasks3')
     assert len(tm.getTasks()) == 0
-    _testGetTasks = None
-    tm._checkMemLeaks()
 
+
+def test_get_do_laters(task_manager):
+    tm = task_manager
     # getDoLaters
     def _testGetDoLaters():
         pass
@@ -379,9 +437,18 @@ def test_TaskManager():
     tm.remove('testDoLater1')
     tm.remove('testDoLater3')
     assert len(tm.getDoLaters()) == 0
-    _testGetDoLaters = None
-    tm._checkMemLeaks()
 
+
+def test_get_all_tasks(task_manager):
+    active_task = task_manager.add(DUMMY_FUNCTION, delay=None)
+    sleeping_task = task_manager.add(DUMMY_FUNCTION, delay=1)
+    assert task_manager.getTasks() == [active_task]
+    assert task_manager.getDoLaters() == [sleeping_task]
+    assert task_manager.getAllTasks() in ([active_task, sleeping_task], [sleeping_task, active_task])
+
+
+def test_duplicate_named_do_laters(task_manager):
+    tm = task_manager
     # duplicate named doLaters removed via taskMgr.remove
     def _testDupNameDoLaters():
         pass
@@ -391,9 +458,10 @@ def test_TaskManager():
     assert len(tm.getDoLaters()) == 2
     tm.remove('testDupNameDoLater')
     assert len(tm.getDoLaters()) == 0
-    _testDupNameDoLaters = None
-    tm._checkMemLeaks()
 
+
+def test_duplicate_named_do_laters_remove(task_manager):
+    tm = task_manager
     # duplicate named doLaters removed via remove()
     def _testDupNameDoLatersRemove():
         pass
@@ -405,10 +473,10 @@ def test_TaskManager():
     assert len(tm.getDoLaters()) == 1
     dl1.remove()
     assert len(tm.getDoLaters()) == 0
-    _testDupNameDoLatersRemove = None
-    # nameDict etc. isn't cleared out right away with task.remove()
-    tm._checkMemLeaks()
 
+
+def test_get_tasks_named(task_manager):
+    tm = task_manager
     # getTasksNamed
     def _testGetTasksNamed(task):
         return task.cont
@@ -421,9 +489,20 @@ def test_TaskManager():
     assert len(tm.getTasksNamed('testGetTasksNamed')) == 3
     tm.remove('testGetTasksNamed')
     assert len(tm.getTasksNamed('testGetTasksNamed')) == 0
-    _testGetTasksNamed = None
-    tm._checkMemLeaks()
 
+
+def test_get_tasks_matching(task_manager):
+    task_manager.add(DUMMY_FUNCTION, 'task_1')
+    task_manager.add(DUMMY_FUNCTION, 'task_2')
+    task_manager.add(DUMMY_FUNCTION, 'another_task')
+
+    assert len(task_manager.getTasksMatching('task_?')) == 2
+    assert len(task_manager.getTasksMatching('*_task')) == 1
+    assert len(task_manager.getTasksMatching('*task*')) == 3
+
+
+def test_remove_tasks_matching(task_manager):
+    tm = task_manager
     # removeTasksMatching
     def _testRemoveTasksMatching(task):
         return task.cont
@@ -445,9 +524,10 @@ def test_TaskManager():
     tm.removeTasksMatching('testRemoveTasksMatching?a')
     assert len(tm.getTasksNamed('testRemoveTasksMatching1a')) == 0
     assert len(tm.getTasksNamed('testRemoveTasksMatching2a')) == 0
-    _testRemoveTasksMatching = None
-    tm._checkMemLeaks()
 
+
+def test_task_obj(task_manager):
+    tm = task_manager
     # create Task object and add to mgr
     l = []
 
@@ -463,9 +543,10 @@ def test_TaskManager():
     tm.remove('testTaskObj')
     tm.step()
     assert len(l) == 2
-    _testTaskObj = None
-    tm._checkMemLeaks()
 
+
+def test_task_remove(task_manager):
+    tm = task_manager
     # remove Task via task.remove()
     l = []
 
@@ -482,9 +563,10 @@ def test_TaskManager():
     tm.step()
     assert len(l) == 2
     del t
-    _testTaskObjRemove = None
-    tm._checkMemLeaks()
 
+
+def test_task_get_sort(task_manager):
+    tm = task_manager
     # set/get Task sort
     l = []
     def _testTaskObjSort(arg, task, l=l):
@@ -508,11 +590,3 @@ def test_TaskManager():
     t2.remove()
     tm.step()
     assert len(l) == 4
-    del t1
-    del t2
-    _testTaskObjSort = None
-    tm._checkMemLeaks()
-
-    del l
-    tm.destroy()
-    del tm