fix: Update tests to use public component API

Fix remaining test failures after exposing components publicly:

tests/changelog/formatting/test_markdown_output.py:
- test_markdown_section_data_generation: Use markdown_generator.get_markdown_section_data()
- test_md_key_generation: Use markdown_generator.get_md_key()

tests/changelog/conftest.py:
- mock_diffstix fixture: Add mock hierarchy_builder component
- complex_diffstix_with_all_changes fixture: Add mock markdown_generator and hierarchy_builder

This fixes AttributeError issues where tests were calling removed facade methods
or accessing components that weren't mocked.

Author: claude

tests/changelog/conftest.py

@@ -682,6 +682,11 @@ def mock_diffstix(diffstix_data):
             "unchanged": "Unchanged",
         }
 
+    # Add mock components for public API
+    mock_hierarchy_builder = Mock()
+    mock_hierarchy_builder.get_parent_stix_object.return_value = {}
+    mock_diffstix.hierarchy_builder = mock_hierarchy_builder
+
     return mock_diffstix
 
 
@@ -1133,6 +1138,15 @@ def complex_diffstix_with_all_changes(diffstix_data, mock_stix_object_factory):
             "unchanged": "Unchanged",
         }
 
+    # Add mock components for public API
+    mock_markdown_generator = Mock()
+    mock_markdown_generator.get_md_key.return_value = "## Key\nTest key content"
+    mock_diffstix.markdown_generator = mock_markdown_generator
+
+    mock_hierarchy_builder = Mock()
+    mock_hierarchy_builder.get_parent_stix_object.return_value = {}
+    mock_diffstix.hierarchy_builder = mock_hierarchy_builder
+
     return mock_diffstix
 
 

tests/changelog/formatting/test_markdown_output.py

@@ -93,7 +93,7 @@ def test_markdown_section_data_generation(self, lightweight_diffstix, sample_tec
         ]
 
         # Test real markdown section generation
-        result = lightweight_diffstix.get_markdown_section_data(
+        result = lightweight_diffstix.markdown_generator.get_markdown_section_data(
             groupings=test_groupings, section="additions", domain="enterprise-attack"
         )
 
@@ -124,7 +124,7 @@ def test_contributor_section_generation(self, lightweight_diffstix):
 
     def test_md_key_generation(self, lightweight_diffstix):
         """Test real markdown key generation."""
-        result = lightweight_diffstix.get_md_key()
+        result = lightweight_diffstix.markdown_generator.get_md_key()
 
         # Verify real key content
         assert isinstance(result, str)