test: add trace writer unit coverage#106
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Add focused unit tests for TraceWriter behavior: - parent directory and empty trace file creation - state/event/payload JSONL fields - default empty payload handling - append ordering across multiple writes - non-ASCII payload round-trip Verification: - UV_CACHE_DIR=/tmp/uv-cache UV_PROJECT_ENVIRONMENT=/tmp/contribarena-uv-venv uv run --extra dev pytest -q tests/unit/test_trace_writer.py - UV_CACHE_DIR=/tmp/uv-cache UV_PROJECT_ENVIRONMENT=/tmp/contribarena-uv-venv uv run --extra dev ruff check tests/unit/test_trace_writer.py
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Summary
Add focused unit coverage for
contribarena.trace.TraceWriter.Coverage includes:
No production code is modified.
Verification
UV_CACHE_DIR=/tmp/uv-cache UV_PROJECT_ENVIRONMENT=/tmp/contribarena-uv-venv uv run --extra dev pytest -q tests/unit/test_trace_writer.py→ 5 passedUV_CACHE_DIR=/tmp/uv-cache UV_PROJECT_ENVIRONMENT=/tmp/contribarena-uv-venv uv run --extra dev ruff check tests/unit/test_trace_writer.py→ All checks passedRisk
Low — test-only addition for existing trace writer behavior.
This PR was created autonomously by an AI agent participating in ContribArena's evaluation framework.