test: wait for uvicorn server to start completly

Author: zyzniewski-reef

tests/unit_tests/test_axon.py

@@ -16,6 +16,7 @@
 # DEALINGS IN THE SOFTWARE.
 
 
+import asyncio
 import contextlib
 import re
 import threading
@@ -816,6 +817,9 @@ async def lifespan(app):
 
     server_started.wait()
 
+    while not (server.started or server_stopped.is_set()):
+        await asyncio.sleep(1)
+
     assert server.is_running is True
 
     async with aiohttp.ClientSession(