Working implementation of DefaultDataPresenter

tests/test_workflow_engine.py

@@ -2,6 +2,8 @@ from unittest.mock import MagicMock
 
 import pytest
 
+from core.Expando import Expando
+from workflow.DefaultDataPresenter import DefaultDataPresenter
 from workflow.engine import WorkflowEngine, DataProcessor, DataProducer, DataFilter, DataPresenter
 
 
@@ -11,6 +13,24 @@ def engine():
   return WorkflowEngine()
 
 
+@pytest.fixture
+def presenter_sample_data():
+  return Expando({
+      "id": 123,
+      "title": "My Awesome Task",
+      "creator": {
+          "id": 1,
+          "name": "John Doe",
+          "email": "john.doe@example.com"
+      },
+      "assignee": {
+          "id": 2,
+          "name": "Jane Smith",
+          "email": "jane.smith@example.com"
+      }
+  })
+
+
 def test_empty_workflow_initialization(engine):
   """Test that a new WorkflowEngine has no processors."""
   assert len(engine.processors) == 0
@@ -124,3 +144,21 @@ def test_branching_workflow(engine):
   
   result = engine.run_to_list()
   assert result == [1, 10, 2, 20]
+
+
+def test_presenter_i_can_use_wildcards(presenter_sample_data):
+  presenter1 = DefaultDataPresenter("component_id", "id, creator.*")
+  res = presenter1.present(presenter_sample_data).as_dict()
+  assert res == {"id": 123, "creator.id": 1, "creator.name": "John Doe", "creator.email": "john.doe@example.com"}
+
+
+def test_presenter_i_can_rename_wildcard_with_specific_override(presenter_sample_data):
+  presenter1 = DefaultDataPresenter("component_id", "creator.*=*, creator.name=author_name")
+  res = presenter1.present(presenter_sample_data).as_dict()
+  assert res == {"id": 1, "email": "john.doe@example.com", "author_name": "John Doe"}
+
+
+def test_presenter_i_can_manage_collisions(presenter_sample_data):
+  presenter1 = DefaultDataPresenter("component_id", "creator.*=*, assignee.*=*")
+  with pytest.raises(ValueError, match="Collision detected for field"):
+    presenter1.present(presenter_sample_data).as_dict()