Converts tests from Timer-based async patterns to step()-based sync
patterns, eliminating timeout issues in headless testing.
Refactored tests:
- simple_timer_screenshot_test.py
- test_animation_callback_simple.py
- test_animation_property_locking.py
- test_animation_raii.py
- test_animation_removal.py
- test_timer_callback.py
Also updates KNOWN_ISSUES.md with comprehensive documentation on
the step()-based testing pattern including examples and best practices.
🤖 Generated with Claude Code (https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Add AnimationConflictMode enum with three modes:
- REPLACE (default): Complete existing animation and start new one
- QUEUE: Wait for existing animation to complete before starting
- ERROR: Raise RuntimeError if property is already being animated
Changes:
- AnimationManager now tracks property locks per (target, property) pair
- Animation.start() accepts optional conflict_mode parameter
- Queued animations start automatically when property becomes free
- Updated type stubs with ConflictMode type alias
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
