fix: update ManagedModel tests to mock runner.run instead of invoke_model

ManagedModel.run() calls self._model_runner.run(), not invoke_model.
The previous mocks were dead code that never exercised the runner.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: jsonbailey

packages/sdk/server-ai/tests/test_managed_model.py

@@ -56,7 +56,7 @@ async def test_run_returns_managed_result(self):
         )
 
         mock_runner = MagicMock()
-        mock_runner.invoke_model = AsyncMock(return_value=_make_runner_result('hi'))
+        mock_runner.run = AsyncMock(return_value=_make_runner_result('hi'))
 
         mock_tracker = MagicMock(spec=LDAIConfigTracker)
         mock_tracker.track_metrics_of_async = AsyncMock(return_value=_make_runner_result('hi'))
@@ -96,7 +96,7 @@ async def _slow_evaluate(input_text: str, output_text: str) -> List[JudgeResult]
         )
 
         mock_runner = MagicMock()
-        mock_runner.invoke_model = AsyncMock(return_value=_make_runner_result())
+        mock_runner.run = AsyncMock(return_value=_make_runner_result())
 
         config, _tracker = _make_config_with_tracker(evaluator)
         model = ManagedModel(config, mock_runner)
@@ -130,7 +130,7 @@ async def _evaluate_coro(input_text: str, output_text: str) -> List[JudgeResult]
         )
 
         mock_runner = MagicMock()
-        mock_runner.invoke_model = AsyncMock(return_value=_make_runner_result())
+        mock_runner.run = AsyncMock(return_value=_make_runner_result())
 
         config, _tracker = _make_config_with_tracker(evaluator)
         model = ManagedModel(config, mock_runner)
@@ -160,7 +160,7 @@ async def _evaluate_coro(input_text: str, output_text: str) -> List[JudgeResult]
         )
 
         mock_runner = MagicMock()
-        mock_runner.invoke_model = AsyncMock(return_value=_make_runner_result())
+        mock_runner.run = AsyncMock(return_value=_make_runner_result())
 
         config, mock_tracker = _make_config_with_tracker(evaluator)
         mock_tracker.track_judge_result = MagicMock()
@@ -195,7 +195,7 @@ async def _evaluate_coro(input_text: str, output_text: str) -> List[JudgeResult]
         )
 
         mock_runner = MagicMock()
-        mock_runner.invoke_model = AsyncMock(return_value=_make_runner_result())
+        mock_runner.run = AsyncMock(return_value=_make_runner_result())
 
         config, mock_tracker = _make_config_with_tracker(evaluator)
         mock_tracker.track_judge_result = MagicMock()
@@ -212,7 +212,7 @@ async def test_noop_evaluator_returns_empty_list(self):
         evaluator = Evaluator.noop()
 
         mock_runner = MagicMock()
-        mock_runner.invoke_model = AsyncMock(return_value=_make_runner_result())
+        mock_runner.run = AsyncMock(return_value=_make_runner_result())
 
         config, _tracker = _make_config_with_tracker(evaluator)
         model = ManagedModel(config, mock_runner)