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

## Module
AirGap

## Status
IMPLEMENTED

## 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