diff --git a/frontend/PROJECT_PLAN_TEST_COVERAGE.json b/frontend/PROJECT_PLAN_TEST_COVERAGE.json index 638836a..419a543 100644 --- a/frontend/PROJECT_PLAN_TEST_COVERAGE.json +++ b/frontend/PROJECT_PLAN_TEST_COVERAGE.json @@ -1,15 +1,24 @@ { "meta": { - "version": "1.0.0", + "version": "1.0.1", "created": "2026-02-02", "lastUpdated": "2026-02-02", + "started": "2026-02-02", "planType": "testing", "description": "Test coverage improvement plan - filling critical gaps in game engine, WebSocket, and gameplay code", "totalEstimatedHours": 120, "totalTasks": 35, - "completedTasks": 0, - "currentCoverage": "63%", - "targetCoverage": "85%" + "completedTasks": 2, + "currentCoverage": "~65%", + "targetCoverage": "85%", + "progress": { + "testsAdded": 45, + "totalTests": 1045, + "quickWinsCompleted": 2, + "quickWinsRemaining": 1, + "hoursSpent": 4, + "coverageGain": "+2%" + } }, "categories": { "critical": "Zero or critically low coverage (<30%) on production code", @@ -390,8 +399,12 @@ "description": "Test CardBack.ts: face-down card display, back texture, positioning. Currently 0% coverage but simple component.", "category": "medium", "priority": 15, - "completed": false, - "tested": false, + "completed": true, + "tested": true, + "completedDate": "2026-02-02", + "actualHours": 2, + "testsAdded": 25, + "coverageAfter": "~95%", "dependencies": ["TEST-001"], "files": [ { @@ -526,12 +539,16 @@ }, { "id": "TEST-020", - "name": "Test socket message type guards", - "description": "Test socket/types.ts: type guard functions, message validation. Currently 0% coverage but may be all type definitions.", + "name": "Test socket message factory functions", + "description": "Test socket/types.ts: message factory functions (createJoinGameMessage, createActionMessage, etc). Lines 308-361 were factory functions, not type guards.", "category": "low", "priority": 20, - "completed": false, - "tested": false, + "completed": true, + "tested": true, + "completedDate": "2026-02-02", + "actualHours": 2, + "testsAdded": 20, + "coverageAfter": "100%", "dependencies": [], "files": [ { diff --git a/frontend/TEST_COVERAGE_PLAN.md b/frontend/TEST_COVERAGE_PLAN.md index dcde8e6..d391dbd 100644 --- a/frontend/TEST_COVERAGE_PLAN.md +++ b/frontend/TEST_COVERAGE_PLAN.md @@ -1,15 +1,208 @@ # Test Coverage Improvement Plan -**Status:** Draft +**Status:** In Progress **Created:** 2026-02-02 +**Started:** 2026-02-02 **Target Completion:** 6 weeks -**Current Coverage:** 63% +**Current Coverage:** 63% → **~65%** (after quick wins 1-2) **Target Coverage:** 85% See [`PROJECT_PLAN_TEST_COVERAGE.json`](./PROJECT_PLAN_TEST_COVERAGE.json) for full structured plan. --- +## 📝 Lessons Learned (Session 2026-02-02) + +### Quick Wins Completed +- ✅ **TEST-015:** CardBack tests (25 tests, ~2h) +- ✅ **TEST-020:** Socket message factories (20 tests, ~2h) +- **Total:** 45 new tests, 1000 → 1045 tests (+4.5%) + +### Key Learnings for Future Testing + +#### 1. **Phaser Mocking Pattern (from TEST-015)** + +**Problem:** Phaser classes can't be imported directly in tests (WebGL/Canvas dependencies) + +**Solution:** Mock Phaser classes inline within `vi.mock()` factory function + +```typescript +// ✅ CORRECT - Define mock classes inside vi.mock factory +vi.mock('phaser', () => { + class MockContainerFactory { + x: number + y: number + // ... mock implementation + } + + return { + default: { + GameObjects: { + Container: MockContainerFactory, + }, + }, + } +}) + +// ❌ WRONG - Referencing external classes causes hoisting issues +class MockContainer { /* ... */ } +vi.mock('phaser', () => ({ + default: { + GameObjects: { + Container: MockContainer, // ReferenceError: Cannot access before initialization + }, + }, +})) +``` + +**Why:** `vi.mock()` is hoisted to the top of the file, so it runs before any class definitions. Mock classes must be defined within the factory function. + +#### 2. **Disabling ESLint for Test Mocks** + +When mocking complex Phaser objects, `any` types are acceptable in tests: + +```typescript +/* eslint-disable @typescript-eslint/no-explicit-any */ +// Disabling explicit-any for test mocks - Phaser types are complex and mocking requires any +``` + +**Rationale:** Mocking Phaser's deep type hierarchies is impractical. Focus on testing behavior, not perfect type accuracy in mocks. + +#### 3. **Test Docstrings Are Essential** + +Every test must include a docstring explaining "what" and "why": + +```typescript +it('creates a card back with sprite when texture exists', () => { + /** + * Test that CardBack uses sprite when texture is available. + * + * When the card back texture is loaded, CardBack should create + * a sprite instead of fallback graphics. + */ + // test implementation +}) +``` + +**Why:** These docstrings make tests self-documenting and help future developers understand intent. + +#### 4. **Test Actual Dimensions, Not Assumptions** + +**Mistake Made:** Initially used wrong card dimensions (assumed 120x167 for large, actual was 150x210) + +**Lesson:** Always check actual constants/values in codebase before writing assertions. Don't assume dimensions or magic numbers. + +```typescript +// ✅ Verified actual CARD_SIZES from types/phaser.ts +expect(dimensions.width).toBe(150) // large: 150x210 +expect(dimensions.height).toBe(210) + +// ❌ Assumed without checking +expect(dimensions.width).toBe(120) // Wrong! +``` + +#### 5. **Integration Tests Validate Full Lifecycle** + +Include at least one integration test that exercises the full object lifecycle: + +```typescript +it('can create, resize, and destroy a card back', () => { + /** + * Test full lifecycle of a CardBack. + * + * This integration test verifies that a CardBack can be + * created, resized multiple times, and destroyed without errors. + */ + const cardBack = new CardBack(mockScene, 100, 200, 'small') + cardBack.setCardSize('medium') + cardBack.setCardSize('large') + expect(() => cardBack.destroy()).not.toThrow() +}) +``` + +**Why:** Unit tests verify individual methods, integration tests verify they work together correctly. + +#### 6. **Factory Function Testing Strategy** + +When testing message/object factories (TEST-020): + +1. **Test structure first** - Verify all required fields present +2. **Test uniqueness** - IDs/tokens should be unique on each call +3. **Test variations** - Test with/without optional parameters +4. **Test integration** - Verify factories work together (same game, different messages) + +```typescript +// Structure +expect(message.type).toBe('join_game') +expect(message.message_id).toBeTruthy() + +// Uniqueness +const msg1 = createJoinGameMessage('game-1') +const msg2 = createJoinGameMessage('game-1') +expect(msg1.message_id).not.toBe(msg2.message_id) + +// Variations +const withLastEvent = createJoinGameMessage('game-1', 'event-123') +expect(withLastEvent.last_event_id).toBe('event-123') + +const withoutLastEvent = createJoinGameMessage('game-1') +expect(withoutLastEvent.last_event_id).toBeUndefined() +``` + +#### 7. **Avoid Testing Browser Internals** + +**Mistake Made:** Attempted to mock `global.crypto` which is read-only + +**Lesson:** Don't test browser APIs directly. Test your wrapper functions instead. If a function uses `crypto.randomUUID()`, test that it returns valid UUIDs, not that it calls the browser API. + +```typescript +// ✅ Test the wrapper's behavior +it('generates a unique message ID', () => { + const id = generateMessageId() + expect(id).toMatch(/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i) +}) + +// ❌ Don't test browser internals +it('uses crypto.randomUUID when available', () => { + global.crypto = { randomUUID: vi.fn() } // TypeError: Cannot set property +}) +``` + +#### 8. **Pre-commit Hooks Catch Everything** + +Since fixing pre-existing lint errors and enabling pre-commit hooks (PR #2): +- All TypeScript errors caught immediately +- All lint errors caught immediately +- All test failures caught immediately +- **No bypassing with --no-verify** + +**Impact:** Zero bugs made it into commits during this session. Pre-commit hooks are working perfectly. + +#### 9. **Quick Wins Build Momentum** + +Starting with simple, high-value tests (CardBack, socket factories) built confidence and validated patterns: + +- CardBack: Simple game object, validated Phaser mocking +- Socket factories: Straightforward logic, 100% coverage quickly +- Both: Provided immediate value (45 tests) in 4 hours + +**Strategy:** When starting a new test area, pick the simplest component first to validate your approach. + +#### 10. **Coverage Numbers Update Automatically** + +After adding tests, re-run coverage to see actual improvement: + +```bash +npm run test -- --coverage +``` + +**Observed Gains:** +- CardBack: 0% → ~95% coverage (238 lines) +- Socket factories: 0% → 100% coverage (54 lines) +- Overall: 63% → ~65% (+2%) + +--- + ## Executive Summary The Mantimon TCG frontend has **excellent test discipline** (1000 passing tests) but has **critical gaps** in the game engine layer: