snakepit

# Implementation Plan


- [ ] 1. Integrate Supertester as Test Dependency
  - Add Supertester to Snakepit and configure for OTP-compliant testing
  - Follow comprehensive-otp-testing-standards.md patterns
  - _Requirements: 1.1, 3.1, 8.1_

- [ ] 1.1 Add Supertester dependency to mix.exs
  - Add `{:supertester, github: "nshkrdotcom/supertester", only: :test}` to deps
  - Run `mix deps.get` to fetch Supertester
  - Verify Supertester modules are available in test environment
  - Configure ExUnit to use Supertester's test tags (:benchmark, :chaos)
  - _Requirements: 1.1, 1.2_

- [ ] 1.2 Configure test_helper.exs for Supertester
  - Import Supertester configuration settings
  - Set up ExUnit configuration for async tests
  - Configure capture_log and other test settings
  - Ensure Arsenal application starts before tests (if needed)
  - _Requirements: 1.1, 3.1_

- [ ] 1.3 Create test/support directory structure
  - Create test/support directory for Snakepit-specific helpers
  - Ensure support files are compiled with tests
  - Add support path to elixirc_paths in mix.exs
  - _Requirements: 1.1, 8.1_

- [ ] 2. Create Snakepit Test Support Modules
  - Build Snakepit-specific helpers on top of Supertester
  - Follow OTP testing standards strictly
  - _Requirements: 1.2, 3.1, 5.1_

- [ ] 2.1 Implement Snakepit.TestHelpers
  - Create with_isolated_pool/2 using Supertester.OTPHelpers
  - Implement wait_for_worker_count/3 without Process.sleep
  - Add test_adapter_config/1 for mock adapter setup
  - Create pool-specific assertion helpers
  - Import all necessary Supertester modules
  - _Requirements: 2.1, 3.1, 3.2_

- [ ] 2.2 Implement Snakepit.MockAdapter
  - Create mock adapter implementing Snakepit.Adapter behaviour
  - Use Supertester.OTPHelpers for process management
  - Implement command recording and response injection
  - Add delay simulation using OTP timers (not sleep)
  - Create failure injection capabilities
  - _Requirements: 5.1, 5.2, 5.3_

- [ ] 2.3 Create test scenario generators
  - Implement common test scenarios using Supertester.DataGenerators
  - Create workload patterns for performance testing
  - Add session affinity test scenarios
  - Build pool saturation scenarios
  - _Requirements: 4.1, 6.1, 7.1_

- [ ] 3. Implement Unit Tests with Supertester
  - Replace minimal tests with comprehensive Supertester-based tests
  - Achieve >90% coverage using OTP patterns
  - _Requirements: 1.1, 1.3, 2.1_

- [ ] 3.1 Create Snakepit.Pool unit tests
  - Test pool initialization using setup_isolated_genserver
  - Test worker management with Supertester.OTPHelpers
  - Test request distribution using cast_and_sync
  - Verify queue management without Process.sleep
  - Use assert_genserver_state for state verification
  - _Requirements: 2.1, 2.2, 2.3, 3.1_

- [ ] 3.2 Create Snakepit.Worker unit tests
  - Test worker lifecycle using monitor_process_lifecycle
  - Test worker state management with OTP patterns
  - Verify worker-pool communication using Supertester helpers
  - Test failure scenarios with wait_for_process_death
  - _Requirements: 2.2, 2.4, 3.3_

- [ ] 3.3 Create Snakepit.Session unit tests
  - Test session creation with unique_session_id
  - Verify session affinity using Supertester isolation
  - Test session lifecycle with cleanup_on_exit
  - Handle concurrent sessions with concurrent_calls
  - _Requirements: 4.1, 4.2, 4.3, 4.5_

- [ ] 3.4 Create Snakepit.Bridge.Protocol unit tests
  - Test protocol encoding/decoding with Supertester assertions
  - Verify error handling using OTP patterns
  - Test message validation without timing dependencies
  - _Requirements: 1.1, 5.3_

- [ ] 3.5 Create adapter unit tests
  - Test GenericPython adapter with Supertester mocking
  - Test GenericJavaScript adapter behavior
  - Verify adapter lifecycle using OTP helpers
  - Test error propagation with proper assertions
  - _Requirements: 5.1, 5.2, 5.4, 5.5_

- [ ] 3.6 Create registry unit tests
  - Test ProcessRegistry with Supertester.MessageHelpers
  - Verify Registry worker tracking using OTP patterns
  - Test WorkerStarterRegistry with proper synchronization
  - Ensure cleanup using Supertester helpers
  - _Requirements: 2.2, 3.3_

- [ ] 4. Implement Integration Tests
  - Test component interactions using Supertester patterns
  - Verify supervision and fault tolerance
  - _Requirements: 1.1, 3.1, 3.4_

- [ ] 4.1 Create pool-worker integration tests
  - Test using Supertester.SupervisorHelpers
  - Verify supervisor restart strategies
  - Test cascading failures with chaos helpers
  - Validate process isolation and cleanup
  - _Requirements: 2.1, 3.2, 3.4_

- [ ] 4.2 Create session-pool integration tests
  - Test session affinity during worker failures
  - Verify session recovery using wait_for_process_restart
  - Test concurrent session operations
  - Validate session cleanup on pool shutdown
  - _Requirements: 4.1, 4.2, 4.4_

- [ ] 4.3 Create bridge protocol integration tests
  - Test end-to-end command execution
  - Verify protocol handling with real adapters
  - Test error propagation through layers
  - Use Supertester timing utilities
  - _Requirements: 5.1, 5.3_

- [ ] 4.4 Create supervisor integration tests
  - Test WorkerSupervisor with test_child_restart_strategies
  - Verify supervision tree integrity
  - Test application startup/shutdown
  - Use assert_all_children_alive
  - _Requirements: 3.2, 3.4, 3.5_

- [ ] 5. Implement Performance Tests
  - Use Supertester.PerformanceHelpers exclusively
  - Establish baselines and detect regressions
  - _Requirements: 6.1, 6.2, 6.3_

- [ ] 5.1 Create throughput benchmarks
  - Use benchmark_operations from Supertester
  - Test with varying worker counts
  - Apply workload_pattern_test for different patterns
  - Measure queue impact on throughput
  - _Requirements: 6.1, 6.2_

- [ ] 5.2 Create latency benchmarks
  - Use measure_request_latency from Supertester
  - Calculate percentiles with calculate_percentiles
  - Benchmark session overhead
  - Test latency under saturation
  - _Requirements: 6.1, 6.2_

- [ ] 5.3 Create stress tests
  - Use concurrent_load_test for sustained load
  - Apply ramp_up_test for increasing load
  - Test with create_memory_pressure
  - Verify graceful degradation
  - _Requirements: 6.2, 6.3_

- [ ] 5.4 Implement performance regression detection
  - Use performance_regression_detector
  - Create baseline with collect_performance_metrics
  - Set up benchmark_with_thresholds
  - Integrate with CI/CD pipeline
  - _Requirements: 6.4, 6.5_

- [ ] 6. Implement Chaos Engineering Tests
  - Use Supertester.ChaosHelpers for resilience testing
  - Follow chaos testing patterns from code standards
  - _Requirements: 7.1, 7.2, 7.3_

- [ ] 6.1 Create worker failure chaos tests
  - Use inject_process_failure for controlled failures
  - Test recovery with verify_system_recovery
  - Apply chaos_test_orchestrator for scenarios
  - Monitor with monitor_chaos_impact
  - _Requirements: 7.1, 7.4, 7.5_

- [ ] 6.2 Create network chaos tests
  - Use simulate_network_corruption
  - Test timeout handling without sleep
  - Verify recovery from partitions
  - Use Supertester's network simulation
  - _Requirements: 7.2, 7.5_

- [ ] 6.3 Create resource exhaustion tests
  - Apply create_memory_pressure scenarios
  - Test queue overflow behavior
  - Verify resource cleanup
  - Use collect_resilience_metrics
  - _Requirements: 7.3, 7.4_

- [ ] 7. Create Test Documentation
  - Document Supertester usage for Snakepit
  - Align with comprehensive-otp-testing-standards.md
  - _Requirements: 8.1, 8.2, 8.3_

- [ ] 7.1 Document test helper usage
  - Create guide for Snakepit.TestHelpers
  - Document MockAdapter usage patterns
  - Explain Supertester integration points
  - Provide troubleshooting guide
  - _Requirements: 8.1, 8.2_

- [ ] 7.2 Create example test suites
  - Provide unit test examples using Supertester
  - Show integration test patterns
  - Demonstrate performance testing
  - Include chaos test examples
  - _Requirements: 8.2, 8.3_

- [ ] 7.3 Document CI/CD integration
  - Set up GitHub Actions with Supertester
  - Configure test.pattern_check task
  - Add coverage reporting
  - Document failure diagnosis
  - _Requirements: 8.4, 8.5_

- [ ] 8. Validate and Optimize Test Suite
  - Ensure all tests follow OTP standards
  - Verify zero Process.sleep usage
  - _Requirements: 1.1, 1.4, 3.1_

- [ ] 8.1 Validate test coverage
  - Run coverage analysis with mix test --cover
  - Ensure >90% coverage across all modules
  - Identify and fill any gaps
  - Verify Supertester helper usage
  - _Requirements: 1.1, 1.4_

- [ ] 8.2 Validate OTP compliance
  - Run pattern check for Process.sleep
  - Verify all tests use async: true
  - Check proper Supertester helper usage
  - Ensure isolation patterns followed
  - _Requirements: 3.1, 3.5_

- [ ] 8.3 Optimize test execution
  - Measure test suite execution time
  - Ensure <30 second execution
  - Optimize slow tests
  - Verify no test interdependencies
  - _Requirements: 1.3, 3.1_

- [ ] 8.4 Create quality metrics
  - Set up test execution reporting
  - Track coverage trends
  - Monitor test reliability
  - Document success metrics
  - _Requirements: 1.5, 8.5_

- [ ] 9. Final Integration Steps
  - Complete Snakepit integration with Supertester
  - Ensure alignment with other repositories using Supertester
  - _Requirements: 1.1, 5.5, 8.5_

- [ ] 9.1 Update project documentation
  - Add testing section to README
  - Document Supertester dependency
  - Reference code standards
  - Update contribution guidelines
  - _Requirements: 8.1, 8.5_

- [ ] 9.2 Configure CI/CD pipeline
  - Set up GitHub Actions workflow
  - Add test quality gates
  - Configure performance baselines
  - Enable regression detection
  - _Requirements: 6.4, 8.4_

- [ ] 9.3 Create migration guide
  - Document migration from old tests
  - Provide conversion examples
  - List common pitfalls
  - Reference Supertester docs
  - _Requirements: 8.3, 8.5_