fix asyn test issues in py27

Author: daniel-sanche

samples/snippets/deletes/deletes_async_test.py

@@ -30,6 +30,14 @@
 TABLE_ID = f"mobile-time-series-deletes-async-{str(uuid.uuid4())[:16]}"
 
 
+@pytest.fixture(scope="module")
+def event_loop():
+    import asyncio
+    loop = asyncio.get_event_loop_policy().new_event_loop()
+    yield loop
+    loop.close()
+
+
 @pytest_asyncio.fixture(scope="module", autouse=True)
 async def table_id() -> AsyncGenerator[str, None]:
     with create_table_cm(PROJECT, BIGTABLE_INSTANCE, TABLE_ID, {"stats_summary": None, "cell_plan": None}, verbose=False):

samples/snippets/filters/filter_snippets_async_test.py

@@ -34,6 +34,14 @@
 TABLE_ID = f"mobile-time-series-filters-async-{str(uuid.uuid4())[:16]}"
 
 
+@pytest.fixture(scope="module")
+def event_loop():
+    import asyncio
+    loop = asyncio.get_event_loop_policy().new_event_loop()
+    yield loop
+    loop.close()
+
+
 @pytest_asyncio.fixture(scope="module", autouse=True)
 async def table_id() -> AsyncGenerator[str, None]:
     with create_table_cm(PROJECT, BIGTABLE_INSTANCE, TABLE_ID, {"stats_summary": None, "cell_plan": None}):