Hitting the technical debt the hard way

src/python/grpcio_tests/commands.py

@@ -120,6 +120,8 @@ class TestAio(setuptools.Command):
 
     def run(self):
         self._add_eggs_to_path()
+        from grpc.experimental.aio import init_grpc_aio
+        init_grpc_aio()
 
         import tests
         loader = tests.Loader()

src/python/grpcio_tests/tests/_runner.py

@@ -115,6 +115,8 @@ class AugmentedCase(collections.namedtuple('AugmentedCase', ['case', 'id'])):
         return super(cls, AugmentedCase).__new__(cls, case, id)
 
 
+# NOTE(lidiz) This complex wrapper is not triggering setUpClass nor
+# tearDownClass. Do not use those methods, or fix this wrapper!
 class Runner(object):
 
     def __init__(self, dedicated_threads=False):

src/python/grpcio_tests/tests_aio/unit/_test_base.py

@@ -46,14 +46,9 @@ def _get_default_loop(debug=True):
 
 class AioTestBase(unittest.TestCase):
 
-    @classmethod
-    def setUpClass(cls):
-        cls._loop = _get_default_loop()
-        aio.init_grpc_aio()
-
     @property
     def loop(self):
-        return self._loop
+        return _get_default_loop()
 
     def __getattribute__(self, name):
         """Overrides the loading logic to support coroutine functions."""
@@ -65,3 +60,6 @@ class AioTestBase(unittest.TestCase):
                 return _async_to_sync_decorator(attr, _get_default_loop())
         # For other attributes, let them pass.
         return attr
+
+
+aio.init_grpc_aio()