test: align engine tests with native jinja default

- opt the ginja mixin regression tests into the hardened renderer
  explicitly now that RunConfig defaults engine rendering to native
- update the image empty-prompt assertion to expect the native-mode
  ValueError surfaced by the generator

Signed-off-by: Eric W. Tramel <[email protected]>

Author: eric-tramel

packages/data-designer-engine/tests/engine/column_generators/generators/test_image.py

@@ -10,7 +10,6 @@
 from data_designer.config.models import ImageContext, ImageFormat, ModalityDataType
 from data_designer.engine.column_generators.generators.base import GenerationStrategy
 from data_designer.engine.column_generators.generators.image import ImageCellGenerator
-from data_designer.engine.processing.ginja.exceptions import UserTemplateError
 
 
 @pytest.fixture
@@ -114,13 +113,13 @@ def test_image_cell_generator_missing_columns_error(stub_image_column_config, st
 
 
 def test_image_cell_generator_empty_prompt_error(stub_resource_provider):
-    """Test that empty rendered prompt raises UserTemplateError."""
+    """Test that empty rendered prompt raises ValueError in native mode."""
     # Create config with template that renders to empty string
     config = ImageColumnConfig(name="test_image", prompt="{{ empty }}", model_alias="test_model")
 
     generator = ImageCellGenerator(config=config, resource_provider=stub_resource_provider)
 
-    with pytest.raises(UserTemplateError):
+    with pytest.raises(ValueError, match="empty"):
         generator.generate(data={"empty": ""})
 
 

packages/data-designer-engine/tests/engine/processing/ginja/test_environment.py

@@ -3,6 +3,7 @@
 
 import pytest
 
+from data_designer.config.run_config import JinjaRenderingEngine
 from data_designer.engine.processing.ginja.environment import (
     ALLOWED_JINJA_FILTERS,
     UserTemplateSandboxEnvironment,
@@ -180,6 +181,7 @@ def test_with_jinja2_user_template_rendering_mixin(test_case, template_1, templa
 
     class Foo(WithJinja2UserTemplateRendering):
         def __init__(self, template_1: str, template_2: str = None):
+            self._jinja_rendering_engine = JinjaRenderingEngine.GINJA
             if template_2 is None:
                 # Single template
                 self.prepare_jinja2_template_renderer(template_1, dataset_variables=["safe"])