fix NoMethodError when using nested_position with fixture files

[OdenTakashi]

Thanks for maintaining everything 🚀

Problem

When the --nested-position option was enabled and annotating fixture files (yml files) with position_in_fixture: "before", a NoMethodError was raised. This occurred because YmlParser does not have the type_map method, which is required by determine_annotation_position to find the most deeply nested class declaration.

The error occurred at:

parsed.type_map[name] == :class

This was not caught in tests because the integration test had fail_on_error: false, allowing the test to pass even when errors occurred.

Solution

A fallback handling was added to determine_annotation_position for parsers that do not have the type_map method (like YmlParser). When type_map is unavailable, the method falls back to using parsed.starts.first, which is the default behavior for non-nested positioning.

This fix ensures that:

• Fixture files (yml) can be annotated with nested_position: true without errors
• When type_map is unavailable, the behavior gracefully falls back to default positioning
• Ruby files (using CustomParser with type_map) continue to work as expected with nested positioning

Test Coverage

• Updated the integration test annotate_collapsed_models_nested_position_spec.rb to use fail_on_error: true to catch errors
• Added the be_successfully_executed assertion to explicitly verify that the command completes without errors
• The test now properly validates that nested_position works correctly with fixture files

refs: #270