[EventHubs] skip tests if aiohttp not installed (Azure#40447)

Author: swathipil

sdk/eventhub/azure-eventhub/tests/pyamqp_tests/asynctests/test_websocket_async.py

@@ -33,7 +33,10 @@ async def send_message(live_eventhub):
 
 
 @pytest.mark.asyncio
-@pytest.mark.skipif(sys.version_info < (3, 9), reason="Test requires Python 3.9 or higher")
+@pytest.mark.skipif(
+    not pytest.importorskip("aiohttp", reason="aiohttp is required for this test"),
+    reason="aiohttp is not installed"
+)
 async def test_event_hubs_client_web_socket_async(live_eventhub):
     uri = "sb://{}/{}".format(live_eventhub["hostname"], live_eventhub["event_hub"])
     sas_auth = _authentication_async.SASTokenAuthAsync(

sdk/eventhub/azure-eventhub/tests/pyamqp_tests/unittest/asynctests/test_websocket_exception_async.py

@@ -1,14 +1,18 @@
+import sys
 import pytest
 import asyncio
 from unittest.mock import patch
-
-import aiohttp
 from azure.eventhub._pyamqp.aio._transport_async import WebSocketTransportAsync
 
 
 # class WebsocketException(unittest.TestCase):
 @pytest.mark.asyncio
+@pytest.mark.skipif(
+    not pytest.importorskip("aiohttp", reason="aiohttp is required for this test"),
+    reason="aiohttp is not installed"
+)
 async def test_websocket_aiohttp_exception_async():
+    import aiohttp
     with patch.object(aiohttp.ClientSession, "ws_connect", side_effect=aiohttp.ClientOSError):
         transport = WebSocketTransportAsync(host="my_host")
         with pytest.raises(aiohttp.ClientOSError):