chore: allow sync init of AsyncConnector

Author: jackwotherspoon

google/cloud/alloydb/connector/async_connector.py

@@ -63,7 +63,13 @@ def __init__(
         # otherwise use application default credentials
         else:
             self._credentials, _ = default(scopes=scopes)
-        self._keys = asyncio.create_task(generate_keys())
+
+        # check if AsyncConnector is being initialized with event loop running
+        # Otherwise we will lazy init keys
+        try:
+            self._keys = asyncio.create_task(generate_keys())
+        except RuntimeError:
+            self._keys = None
         self._client: Optional[AlloyDBClient] = None
 
     async def connect(
@@ -90,6 +96,8 @@ async def connect(
         Returns:
             connection: A DBAPI connection to the specified AlloyDB instance.
         """
+        if self._keys is None:
+            self._keys = asyncio.create_task(generate_keys)
         if self._client is None:
             # lazy init client as it has to be initialized in async context
             self._client = AlloyDBClient(

tests/unit/test_async_connector.py

@@ -191,3 +191,8 @@ async def test_connect_unsupported_driver(
             exc_info.value.args[0]
             == "Driver 'bad_driver' is not a supported database driver."
         )
+
+
+def test_synchronous_init(credentials: FakeCredentials) -> None:
+    connector = AsyncConnector(credentials)
+    assert connector._keys is None