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Changelog

All notable changes to rpytest are documented here.

[0.1.2] - 2026-05-07

Added

  • State Machine Architecture
  • Explicit WorkerState in worker pool (Spawning → Ready → Busy → Recycling → Dead)
  • Explicit ExecutionState for hybrid auto mode (ColdStart → Warming → Warm)
  • Explicit WatchState for watch mode (Idle → Debouncing → ComputingAffected → Recollecting → Running)
  • Explicit StabilityState for flakiness tracking (Unknown → Stable → Unstable → Flaky → ConfirmedFlaky)

  • Explicit LifecycleManager for daemon lifecycle with event-driven transitions

  • Distribution

  • npm package (npm install -g rpytest)
  • Homebrew tap (brew tap neul-labs/tap && brew install rpytest)
  • PyPI package with bundled platform binaries

Fixed

  • CI workflow paths (daemon/ → packages/pypi/)
  • Version alignment across Cargo, Python, and documentation
  • All placeholder URLs updated to github.com/neul-labs/rpytest
  • License changed to MIT-only throughout

[0.1.0] - 2024-01-15

Added

  • Core Features
  • Drop-in pytest replacement with Rust CLI
  • Python daemon for test execution
  • Native test collection via AST parsing

  • Full pytest fixture compatibility

  • Parallel Execution

  • Built-in -n flag for parallel test execution
  • LPT (Longest Processing Time) scheduling algorithm

  • Duration tracking for optimal load balancing

  • Sharding

  • --shard and --total-shards for CI distribution
  • Three strategies: duration_balanced, hash, round_robin

  • --shard-info for distribution analysis

  • Watch Mode

  • --watch for automatic test re-runs
  • Dependency tracking for affected test detection

  • Debounced file change detection

  • Flakiness Detection

  • --reruns for automatic retry of failed tests
  • --flaky-report for flakiness analysis

  • Per-test flakiness tracking

  • Fixture Reuse

  • --reuse-fixtures for session fixture persistence
  • Automatic invalidation on conftest changes

  • --session-status for fixture inspection

  • Editor Integration

  • --editor-server for IDE integration
  • JSON-RPC protocol over stdio

  • Test discovery and run-at-cursor

  • Daemon Management

  • --daemon for foreground daemon mode
  • --daemon-idle-timeout for auto-shutdown

  • Auto-start on first invocation

  • Output Formats

  • --json for JSON output
  • --junitxml for JUnit XML reports
  • Verbose/quiet modes

Performance

  • CLI startup: <10ms (vs pytest ~200ms)
  • Collection: 10-28x faster than pytest
  • Memory: 6-8x less than pytest CLI
  • Parallel efficiency: 90%+ utilization

[Unreleased]

Planned Features

  • Incremental Collection: Only re-parse changed files
  • Result Caching: Skip tests when code unchanged
  • Distributed Execution: Run across multiple machines
  • Coverage Integration: Native coverage support
  • VS Code Extension: Official extension for VS Code
  • Neovim Plugin: neotest adapter

Known Issues

  • Some pytest plugins may not work correctly
  • Custom conftest hooks have limited support
  • Output format differs slightly from pytest

Versioning

rpytest follows Semantic Versioning:

  • MAJOR: Breaking changes to CLI or behavior
  • MINOR: New features, backwards compatible
  • PATCH: Bug fixes, backwards compatible

Release Schedule

  • Stable releases: As needed for significant features
  • Patch releases: As needed for bug fixes
  • Pre-releases: For testing new features

Upgrading

From 0.1.x to 0.1.2

No breaking changes. Direct upgrade supported.

Configuration Changes

Check pyproject.toml for deprecated options:

# Deprecated
[tool.rpytest]
workers = 4  # Use parallel instead

# Current
[tool.rpytest]
parallel = 4

Contributing

Contributions are welcome on GitHub:

  • Development setup
  • Code style guidelines
  • Testing requirements
  • Pull request process