test: update gemini health check test to reflect removal of fetchAvailableModels

Modified test_gemini_health_check.py to assert that only loadCodeAssist is called, following the deprecation of the fetchAvailableModels endpoint.

Author: Mateusz

tests/unit/connectors/test_gemini_health_check.py

@@ -53,11 +53,13 @@ async def test_health_check_uses_load_code_assist_endpoint(
     mock_client = _MockAsyncClient()
     backend.client = mock_client  # type: ignore[assignment]
 
-    ok = await backend._perform_health_check()
-    assert ok is True
-    assert mock_client.calls, "Health check did not invoke HTTP client"
-    # The fallback should issue a POST to loadCodeAssist after initial GET fails
-    methods = [method for method, _ in mock_client.calls]
-    assert "POST" in methods
-    post_calls = [url for method, url in mock_client.calls if method == "POST"]
-    assert post_calls and post_calls[-1].endswith("/v1internal:loadCodeAssist")
+    ok = await backend._perform_health_check()
+    assert ok is True
+    assert mock_client.calls, "Health check did not invoke HTTP client"
+    # Now only issues a POST to loadCodeAssist (fetchAvailableModels is deprecated)
+    methods = [method for method, _ in mock_client.calls]
+    assert "POST" in methods
+    assert "GET" not in methods
+    post_calls = [url for method, url in mock_client.calls if method == "POST"]
+    assert post_calls and post_calls[-1].endswith("/v1internal:loadCodeAssist")
+