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Deterministic Test Harness (Frozen Time, Seeded RNG, Network Isolation)

Module

AirGap

Status

VERIFIED

Description

Deterministic testing infrastructure with frozen time providers, deterministic fixtures, and Testcontainers for PostgreSQL isolation across backend and frontend.

Implementation Details

  • Test infrastructure: src/__Tests/__Libraries/StellaOps.Testing.Chaos/Models.cs -- chaos/deterministic testing models
  • AirGap tests: src/AirGap/__Tests/ -- Controller, Importer, Persistence, Sync, Time tests
  • Frozen time: src/AirGap/StellaOps.AirGap.Time/ -- time anchor services with frozen time providers, staleness calculation
  • Time fixtures: src/AirGap/StellaOps.AirGap.Time/fixtures/ -- deterministic time test fixtures
  • Testcontainers: PostgreSQL isolation via src/AirGap/StellaOps.AirGap.Storage.Postgres.Tests/
  • Source: Feature matrix scan

E2E Test Plan

  • Verify frozen time providers produce deterministic timestamps
  • Test seeded RNG produces reproducible results
  • Verify Testcontainers PostgreSQL isolation works correctly
  • Test deterministic fixtures produce identical outputs across runs

Verification

  • Verified on 2026-02-11 with run-001.
  • Tier 0 source/declaration checks passed for deterministic harness surfaces across AirGap time fixtures/services, sync fixed-time utilities, persistence postgres fixture/tests, and testing replay/chaos libraries.
  • Tier 1 build/tests passed across time/sync/persistence plus testing-chaos/testing-replay projects (48/48 time tests, 40/40 sync tests, 23/23 persistence tests, 51/51 chaos tests, 20/20 replay tests).
  • Tier 2 behavioral checks passed with live /system/airgap/verify repeated requests returning byte-identical pass payloads for identical inputs, plus integration evidence for postgres testcontainer isolation and replay harness execution.
  • Evidence:
    • docs/qa/feature-checks/runs/airgap/deterministic-test-harness/run-001/tier0-source-check.json
    • docs/qa/feature-checks/runs/airgap/deterministic-test-harness/run-001/tier1-build-check.json
    • docs/qa/feature-checks/runs/airgap/deterministic-test-harness/run-001/tier2-api-check.json