fix: migration to python 3.12. called_once was deleted in favor of assert_called_once, since it was largely misused

PiperOrigin-RevId: 733699828

Author: vertex-sdk-bot

tests/unit/aiplatform/test_models.py

@@ -4240,9 +4240,7 @@ def test_model_evaluate_with_gcs_input_uris(
 
         assert isinstance(eval_job, model_evaluation_job._ModelEvaluationJob)
 
-        assert mock_pipeline_service_create.called_once
-
-        assert mock_pipeline_service_get.called_once
+        mock_pipeline_service_create.assert_called_once()
 
         eval_job.wait()
 
@@ -4283,9 +4281,7 @@ def test_model_evaluate_with_bigquery_input(
 
         assert isinstance(eval_job, model_evaluation_job._ModelEvaluationJob)
 
-        assert mock_pipeline_service_create.called_once
-
-        assert mock_pipeline_service_get.called_once
+        mock_pipeline_service_create.assert_called_once()
 
     @pytest.mark.parametrize(
         "job_spec_json",
@@ -4315,9 +4311,7 @@ def test_model_evaluate_using_initialized_staging_bucket(
 
         assert isinstance(eval_job, model_evaluation_job._ModelEvaluationJob)
 
-        assert mock_pipeline_service_create.called_once
-
-        assert mock_pipeline_service_get.called_once
+        mock_pipeline_service_create.assert_called_once()
 
     def test_model_evaluate_with_no_staging_path_or_initialized_staging_bucket_raises(
         self,