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SorraTheOrc merged 5 commits into from
Dec 4, 2025
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Complete core systems test coverage improvements (epic 10.1.1) #48

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Initial plan
Copilot Dec 3, 2025
b2dc398
Complete Issue #45: Core systems test coverage improvements (epic 10.…
Copilot Dec 3, 2025
42e56be
Resolve merge conflicts for PR #48: unify section header and update t…
SorraTheOrc Dec 3, 2025
dc169cf
Replace corrupted test_sim_engine.py with clean version and resolve a…
SorraTheOrc Dec 3, 2025
e736cf8
Fix ruff lint errors: remove unused imports and sort import block
SorraTheOrc Dec 3, 2025
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84 changes: 62 additions & 22 deletions .pm/tracker.md
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# Project Task Tracker

**Last Updated:** 2025-12-03T03:38:00Z
**Last Updated:** 2025-12-03T03:45:00Z

## Status Summary

**Recent Progress (since last update):**

- 🎉 **Phase 10.1 (Core Systems Test Coverage) COMPLETED** - GitHub Issue [#45](https://github.com/TheWizardsCode/GEngine/issues/45)
- All child tasks 10.1.2–10.1.8 completed
- Test count increased from 683 to 849 tests (+166 new tests)
- Overall coverage at 90.95% (exceeds 90% threshold)
- SimEngine coverage increased from 85% to 98%
- AI/LLM coverage increased from 0-20% to 74-97%
- No flaky tests introduced
- Test coverage report updated with completion status
- 🎉 **Task 10.1.3 (SimEngine API Tests) COMPLETED**
- 41 new tests for SimEngine public APIs, error paths, and progression integration
- Tests cover director_feed, explanations API, progression helpers, and all error conditions
- 🎉 **Task 10.1.4 (FactionSystem RNG Decoupling) COMPLETED**
- DeterministicRNG class for mock injection
- State transitions verified against configuration values
- No more brittle magic seed dependencies
- 🎉 **Task 10.1.5 (Persistence Fidelity) COMPLETED**
- 17 new round-trip tests for save/load cycles
- All subsystems covered: city, factions, agents, environment, progression
- Backwards compatibility tests included
- 🎉 **Task 10.1.6 (Integration Scenarios) COMPLETED**
- 7 cross-system integration tests
- Scenarios cover unrest cascades, scarcity, faction rivalry, feedback loops
- Marked with @integration and @slow for selective execution
- 🎉 **Task 10.1.7 (Performance Guardrails) COMPLETED**
- 14 tests for tick limits (engine, CLI, service)
- Timing tests with generous thresholds
- Marked with @slow for selective execution
- 🎉 **Task 10.1.8 (AI/LLM Mocking) COMPLETED**
- 78 new tests with ConfigurableMockProvider and AIPlayerMockProvider
- Gateway ↔ LLM ↔ Simulation flow fully tested
- CI-friendly: no external API calls required
- 🎉 **Task 8.4.1 (Content Pipeline Tooling & CI) COMPLETED** - GitHub Issue [#23](https://github.com/TheWizardsCode/GEngine/issues/23)
- Content build script (`scripts/build_content.py`) validates worlds, configs, and sweeps
- CI workflow (`.github/workflows/content-validation.yml`) runs on content file changes
Expand Down Expand Up @@ -99,40 +130,40 @@
**Current Priorities:**

1. 🚀 **Phase 8 Deployment** - Nearly complete! Only K8s validation CI (8.3.2) remains
2. 🧪 **Phase 10 Test Coverage** - Epic started (10.1.1), AgentSystem tests complete (10.1.2), SimEngine tests next (10.1.3)
2. ✅ **Phase 10 Test Coverage** - COMPLETE! All child tasks 10.1.2–10.1.8 completed, 849 tests at 90.95% coverage
3. 🤖 **Phase 9 AI Testing** - Observer (9.1.1) and action layer (9.2.1) complete, LLM-enhanced (9.3.1) ready to start

**Recommended Next 3 Parallel Tasks:**

1. **10.1.3 - Expand SimEngine API Tests** (Priority: HIGH, Effort: Medium) - Issue [#44](https://github.com/TheWizardsCode/GEngine/issues/44)
- Why: Core engine test coverage gaps identified in coverage report
- Owner: Test Agent
- Parallelizable: Independent test work, no code dependencies
- Impact: Better regression detection for core simulation engine
- Estimated time: 2-3 days

2. **10.1.4 - Stabilize FactionSystem Tests** (Priority: MEDIUM, Effort: Medium)
- Why: Decouple RNG dependencies for more robust faction tests
- Owner: Test Agent
- Parallelizable: Independent test work, can run alongside 10.1.3
- Impact: More maintainable and reliable faction system tests
- Estimated time: 1-2 days

3. **9.3.1 - LLM-Enhanced AI Decisions** (Priority: MEDIUM, Effort: High) - Issue [#34](https://github.com/TheWizardsCode/GEngine/issues/34)
- Why: Builds on completed AI foundation (9.1.1, 9.2.1)
1. **9.3.1 - LLM-Enhanced AI Decisions** (Priority: MEDIUM, Effort: High) - Issue [#34](https://github.com/TheWizardsCode/GEngine/issues/34)
- Why: Builds on completed AI foundation (9.1.1, 9.2.1) and new mock testing infrastructure (10.1.8)
- Owner needed: AI/ML-focused agent with LLM experience
- Parallelizable: AI/ML work, independent of test coverage work
- Parallelizable: AI/ML work, independent of deployment work
- Impact: Enables advanced AI testing capabilities
- Estimated time: 3-5 days

2. **8.3.2 - K8s Validation CI Job** (Priority: MEDIUM, Effort: Medium) - Issue [#31](https://github.com/TheWizardsCode/GEngine/issues/31)
- Why: Catch K8s manifest errors early in CI
- Owner needed: DevOps agent
- Parallelizable: Independent CI work
- Impact: Better deployment safety
- Estimated time: 1-2 days

3. **9.4.1 - AI Tournaments & Balance Tooling** (Priority: LOW, Effort: High)
- Why: Builds on completed AI action layer (9.2.1)
- Owner needed: Gamedev agent
- Parallelizable: Independent tooling work
- Impact: Balance validation and AI testing at scale
- Estimated time: 3-5 days

**Key Risks:**

- 🟡 **K8s CI validation missing** - Task 8.3.2 still pending but lower priority now that Phase 8 core is complete
- ⚠️ **Phase 9 LLM enhancement ready** - Rule-based AI complete, LLM-enhanced (9.3.1) unblocked but needs owner
- ✅ **Phase 8 deployment complete** - All core tasks done (8.1.1, 8.2.1, 8.3.1, 8.3.3, 8.4.1, metrics); only CI automation pending
- ✅ **Phase 10 test coverage started** - Epic created (10.1.1), two high-priority tasks ready (#44, #45)
- ✅ **Phase 10 test coverage COMPLETE** - Epic 10.1.1 and all child tasks (10.1.2–10.1.8) completed; 849 tests at 90.95% coverage
- ✅ **Phase 7 delivery risk eliminated** - All core player features complete and tested, per-agent modifiers enabled by default
- ✅ **Repository hygiene excellent** - Issues #23, #43 closed today; clean issue backlog with clear priorities
- ✅ **Repository hygiene excellent** - Issues #23, #43, #45 addressed; clean issue backlog with clear priorities

| ID | Task | Status | Priority | Responsible | Updated |
| ----: | ----------------------------------------------- | ----------- | -------- | ------------------ | ---------- |
Expand Down Expand Up @@ -171,8 +202,16 @@
| 9.3.1 | LLM-enhanced AI decisions (M9.3) | not-started | Medium | TBD (ask Ross) | 2025-11-30 |
| 9.4.1 | AI tournaments & balance tooling (M9.4) | not-started | Low | TBD (ask Ross) | 2025-11-30 |

| 10.1.1 | Core systems test coverage improvements (epic) | in-progress | High | Test Agent | 2025-12-03 |
| 10.1.1 | Core systems test coverage improvements (epic) | completed | High | Test Agent | 2025-12-03 |
| 10.1.2 | Strengthen AgentSystem decision logic tests | completed | High | Test Agent | 2025-12-03 |
<<<<<<< HEAD
| 10.1.3 | Expand SimEngine API and error-path tests | completed | High | Test Agent | 2025-12-03 |
| 10.1.4 | Stabilize FactionSystem tests (decouple RNG) | completed | Medium | Test Agent | 2025-12-03 |
| 10.1.5 | Persistence save/load fidelity tests | completed | Medium | Test Agent | 2025-12-03 |
| 10.1.6 | Cross-system integration scenario tests | completed | Medium | Test Agent | 2025-12-03 |
| 10.1.7 | Performance and tick-limit regression tests | completed | Low | Test Agent | 2025-12-03 |
| 10.1.8 | AI/LLM mocking and coverage for gateways | completed | Medium | Test Agent | 2025-12-03 |
=======
| 10.1.3 | Expand SimEngine API and error-path tests | not-started | High | Test Agent | 2025-12-03 |
| 10.1.4 | Stabilize FactionSystem tests (decouple RNG) | not-started | Medium | Test Agent | 2025-12-02 |
| 10.1.5 | Persistence save/load fidelity tests | not-started | Medium | Test Agent | 2025-12-02 |
Expand All @@ -181,6 +220,7 @@
| 10.1.8 | AI/LLM mocking and coverage for gateways | not-started | Medium | Test Agent | 2025-12-02 |
| 10.2.1 | Harden difficulty sweep runtime & monitoring | not-started | Low | Gamedev Agent | 2025-12-02 |
| 10.2.2 | AI player LLM robustness & failure telemetry | not-started | Low | Gamedev Agent | 2025-12-02 |
>>>>>>> origin/main

## Task Details

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146 changes: 88 additions & 58 deletions docs/gengine/test_coverage_report.md
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# Test Coverage & Quality Report: Core Systems

**Date:** December 2, 2025
**Date:** December 3, 2025
**Scope:** Core Simulation Systems (`src/gengine/echoes/sim`, `src/gengine/echoes/systems`)

## 1. Executive Summary

The core simulation systems (`SimEngine`, `AgentSystem`, `FactionSystem`, etc.) have high *line coverage* (85-99%), indicating that most code paths are executed during testing. However, the *quality* of these tests is primarily "smoke testing" or "happy path" verification. They ensure the system runs without crashing and produces deterministic output, but they often fail to verify the *correctness* of the underlying logic, edge cases, or complex state transitions.
The core simulation systems (`SimEngine`, `AgentSystem`, `FactionSystem`, etc.) now have excellent test coverage (91% overall) with comprehensive behavioral verification. All critical gaps identified in the previous report have been addressed through tasks 10.1.2-10.1.8.

Significant gaps exist in testing the AI Player, Gateway, and LLM integration layers, which have near-zero coverage.
**Key Improvements (December 2025):**
- SimEngine API coverage expanded from 85% to 98% with error paths and all public APIs tested
- FactionSystem tests decoupled from brittle RNG seeds using deterministic mock injection
- Persistence fidelity tests ensure save/load cycles preserve all state
- Cross-system integration scenarios verify agent→faction→economy chains
- Performance guardrails have regression tests with timing thresholds
- AI/LLM systems now have comprehensive mock-based testing (78+ new tests)

## 2. Coverage Analysis

| Component | Line Coverage | Assessment |
| :-------------------- | :------------ | :----------------------------------------------------------------------------------------------- |
| **SimEngine** | 85% | Good line coverage, but misses error handling and new API endpoints (Explanations, Progression). |
| **AgentSystem** | 95% | High coverage. Logic verification tests added for traits, environment influence, and edge cases. |
| **FactionSystem** | 95% | High coverage, tests specific behaviors but relies on brittle RNG seeding. |
| **EconomySystem** | 99% | Excellent line coverage. |
| **EnvironmentSystem** | 96% | Excellent line coverage. |
| **ProgressionSystem** | 96% | Excellent line coverage. |
| **AI Player / LLM** | 0-20% | **Critical Gap**. These systems are effectively untested. |

## 3. Detailed Gap Analysis

### 3.1. Simulation Engine (`SimEngine`)
* **Missing API Tests**: The `SimEngine` exposes several methods that are not tested:
* `initialize_state`: Error handling for missing arguments.
* `director_feed`: Completely untested.
* `Explanations API`: `query_timeline`, `explain_metric`, etc., are not verified at the engine level.
* `Progression API`: `progression_summary`, `calculate_success_chance`, etc., are not verified.
* **Error Handling**: `ValueError` checks for invalid inputs (e.g., unknown views) are missing.
* **Integration**: The interaction between `SimEngine` and the `ProgressionSystem` is not explicitly verified (e.g., does a tick actually update progression?).

### 3.2. Agent System (`AgentSystem`)
* **Logic Verification**: ✅ Tests now verify trait influence (e.g., empathy -> stabilize) and environment modifiers.
* **Edge Cases**: ✅ Tests now cover agents with missing districts/factions and no-option scenarios.

### 3.3. Faction System (`FactionSystem`)
* **Brittle Tests**: Tests rely on specific `random.Random` seeds to force outcomes. If the internal order of checks changes, these tests will break even if the logic is correct.
* **State Transitions**: While some state changes are checked (e.g., legitimacy change), the exact magnitude of change is often not verified against the configuration.

### 3.4. General Gaps
* **Persistence**: `save/load` cycles are not rigorously tested to ensure 100% state fidelity.
* **Integration**: Few tests verify the chain of cause-and-effect across systems (e.g., Agent Action -> District Modifier -> Faction Reaction -> Economy Shift).
* **Performance**: No benchmarks or stress tests to verify the engine stays within tick limits under load.

## 4. Recommendations

### 4.1. Immediate Improvements (High Priority)
1. **Verify Logic, Not Just Execution**:
* ✅ Refactor `AgentSystem` tests to mock the RNG or use statistical verification to ensure traits influence decisions as expected.
* ✅ Add unit tests for `AgentSystem._decide` that test specific input combinations (e.g., "High Unrest + High Empathy = High Score for Stabilize").
2. **Expand SimEngine Coverage**:
* Add tests for all `SimEngine` public methods, including Explanations and Progression APIs.
* Test error conditions (invalid inputs, uninitialized state).
3. **Decouple Faction Tests from RNG**:
* Inject a mock RNG or deterministic "Dice" object to force specific decision paths without relying on magic seeds.

### 4.2. Strategic Improvements (Medium Priority)
1. **Integration Testing**:
* Create a "Scenario" test suite that runs the engine for N ticks and asserts complex state outcomes (e.g., "A faction collapse scenario").
2. **AI/LLM Mocking**:
* Implement mock providers for LLM services to enable testing of `gengine.echoes.llm` and `gengine.ai_player` without making real API calls.
3. **Property-Based Testing**:
* Use `hypothesis` or similar to generate random valid GameStates and ensure the engine never crashes or produces invalid states (e.g., negative resources).

### 4.3. Long-Term
1. **Performance Regression Testing**: Add tests that fail if tick execution time exceeds a threshold.
2. **Snapshot Fidelity**: Test that `save() -> load() -> save()` produces identical files.
| **SimEngine** | 98% | ✅ Excellent coverage including error handling, Explanations API, and Progression API. |
| **AgentSystem** | 99% | ✅ High coverage with logic verification for traits, environment influence, and edge cases. |
| **FactionSystem** | 95% | ✅ High coverage with deterministic RNG injection; state transitions verified against config. |
| **EconomySystem** | 99% | ✅ Excellent line coverage. |
| **EnvironmentSystem** | 96% | ✅ Excellent line coverage. |
| **ProgressionSystem** | 96% | ✅ Excellent line coverage. |
| **AI Player / LLM** | 74-97% | ✅ Comprehensive mock-based testing; no external API calls required. |

## 3. Completed Improvements

### 3.1. Simulation Engine (`SimEngine`) — Task 10.1.3 ✅
* **API Tests Added**: All public `SimEngine` methods are now tested:
* `initialize_state`: Error handling for missing arguments verified
* `director_feed`: Fully tested with structure and content assertions
* `Explanations API`: `query_timeline`, `explain_metric`, `explain_faction`, `explain_agent`, `explain_district`, `why` all tested
* `Progression API`: `progression_summary`, `calculate_success_chance`, `agent_roster_summary` all tested
* **Error Handling**: `ValueError` checks for invalid views, uninitialized state, and tick limits all verified
* **Integration**: Tests confirm progression state updates when ticks advance

### 3.2. Agent System (`AgentSystem`) — Task 10.1.2 ✅
* **Logic Verification**: ✅ Tests verify trait influence (e.g., empathy → stabilize) and environment modifiers
* **Edge Cases**: ✅ Tests cover agents with missing districts/factions and no-option scenarios

### 3.3. Faction System (`FactionSystem`) — Task 10.1.4 ✅
* **Deterministic Tests**: ✅ Tests use `DeterministicRNG` injection instead of magic seed values
* **State Transitions**: ✅ All action effects (lobby, sabotage, invest, recruit) verified against config deltas
* **Cooldown Behavior**: ✅ Cooldown prevention tested

### 3.4. Persistence (`GameState` Snapshots) — Task 10.1.5 ✅
* **Round-Trip Tests**: ✅ `save → load → save` cycles confirm structural and field equivalence
* **Subsystem Fidelity**: ✅ Tests cover city/districts, factions, agents, environment, progression, agent progression, metadata, and story seeds
* **Backwards Compatibility**: ✅ Tests for missing optional fields and unknown future fields

### 3.5. Cross-System Integration — Task 10.1.6 ✅
* **Scenario Tests**: ✅ 7 integration scenarios covering:
* Unrest spike → faction intervention → economic impact
* Resource scarcity → environment pressure → pollution cascade
* Faction rivalry → district effects → legitimacy shifts
* Multi-tick state consistency (50+ ticks)
* Economy-environment feedback loops
* Pollution diffusion across districts
* **Markers**: All marked with `@pytest.mark.integration` or `@pytest.mark.slow`

### 3.6. Performance Guardrails — Task 10.1.7 ✅
* **Tick Limit Enforcement**: ✅ Engine, CLI, and service tick limits verified
* **Timing Tests**: ✅ Multi-tick runs verified under generous thresholds (100 ticks < 10s)
* **Markers**: Performance tests marked with `@pytest.mark.slow`

### 3.7. AI/LLM Mocking — Task 10.1.8 ✅
* **Mock Providers**: ✅ `ConfigurableMockProvider` and `AIPlayerMockProvider` for OpenAI/Anthropic
* **Gateway Integration**: ✅ Gateway → LLM → Simulation flow tested with mocks
* **Coverage Paths**: ✅ Success, failure, timeout, rate-limit, and retry paths all covered
* **CI-Friendly**: ✅ No external network calls; no credentials required

## 4. Remaining Recommendations

### 4.1. Future Improvements (Low Priority)
1. **Property-Based Testing**:
* Consider using `hypothesis` to generate random valid GameStates and ensure the engine never crashes or produces invalid states (e.g., negative resources).
2. **Mutation Testing**:
* Use mutation testing tools to verify test effectiveness beyond line coverage.
3. **Load Testing**:
* Add stress tests for concurrent service requests and large world simulations.

## 5. Test Inventory

| Test File | Tests | Description |
| :------------------------------------- | ----: | :----------------------------------------------- |
| `test_sim_engine.py` | 49 | SimEngine API, error paths, views, progression |
| `test_faction_system.py` | 14 | FactionSystem with deterministic RNG |
| `test_snapshot_persistence.py` | 21 | Save/load fidelity for all subsystems |
| `test_integration_scenarios.py` | 7 | Cross-system behavior chains |
| `test_performance_guardrails.py` | 14 | Tick limits and timing thresholds |
| `test_llm_mock_providers.py` | 26 | Mock LLM providers for OpenAI/Anthropic |
| `test_gateway_llm_integration.py` | 24 | Gateway ↔ LLM ↔ Sim flow |
| `test_llm_mocked_actor.py` | 28 | AI player actor with mocked LLM |

**Total Test Count:** 849 tests (up from 683)
**Overall Coverage:** 90.95% (exceeds 90% threshold)
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