Update test typing

Author: EpicWink

Lib/test/test_queue.py

@@ -10,6 +10,16 @@
 from test.support import import_helper
 from test.support import threading_helper
 
+import typing as t
+
+if t.TYPE_CHECKING:
+    import queue
+
+    parent_class = unittest.TestCase
+
+else:
+    parent_class = object
+
 # queue module depends on threading primitives
 threading_helper.requires_working_threading(module=True)
 
@@ -55,7 +65,10 @@ def run(self):
 # is supposed to raise an exception, call do_exceptional_blocking_test()
 # instead.
 
-class BlockingTestMixin:
+class BlockingTestMixin(parent_class):
+    if t.TYPE_CHECKING:
+        queue = queue
+        type2test: t.Type[queue.Queue]
 
     def do_blocking_test(self, block_func, block_args, trigger_func, trigger_args):
         thread = _TriggerThread(trigger_func, trigger_args)
@@ -797,7 +810,10 @@ class CFailingQueueTest(FailingQueueTest, unittest.TestCase):
     queue = c_queue
 
 
-class BaseSimpleQueueTest:
+class BaseSimpleQueueTest(parent_class):
+    if t.TYPE_CHECKING:
+        queue = queue
+        type2test: t.Type[queue.Queue]
 
     def setUp(self):
         self.q = self.type2test()