docs(04-01): complete queue unit tests plan

2026-03-03 17:02:32 -05:00
parent 294b629877
commit 5513d47a4a
3 changed files with 126 additions and 24 deletions
@@ -0,0 +1,99 @@
+---
+phase: 04-queue-config-player-tests
+plan: 01
+subsystem: testing
+tags: [queue, sqlite, unit-tests, shuffle, repeat, persistence]
+
+# Dependency graph
+requires:
+  - phase: 03-test-infrastructure
+    provides: "NewTestDB(t) helper for in-memory SQLite test databases"
+provides:
+  - "29 queue tests covering core ops, navigation, and persistence roundtrip"
+  - "Mock TrackLoader and seedAudioFiles test helpers in queue package"
+  - "Safety net for Phase 7 (PERF-01) queue persistence refactoring"
+affects: [07-performance-optimization]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: ["internal package tests (package queue, not queue_test)", "direct field manipulation for pure logic tests (no DB)", "seedAudioFiles helper with FK chain for DB-backed tests"]
+
+key-files:
+  created:
+    - backend/queue/queue_test.go
+    - backend/queue/navigation_test.go
+    - backend/queue/persistence_test.go
+  modified: []
+
+key-decisions:
+  - "Internal tests (package queue) to access unexported fields like shuffleOrder, mu"
+  - "Navigation tests use direct struct construction (no DB) for fast pure-logic testing"
+  - "Persistence roundtrip test verifies ALL state fields including shuffleOrder JSON"
+
+patterns-established:
+  - "mockTrackLoader pattern: no-op TrackLoader with loadedFile tracking"
+  - "seedAudioFiles helper: creates FK chain (artist_credit → recordings → audio_files) for N tracks"
+  - "newTestQueueDirect: direct Queue construction for navigation/logic tests without DB"
+
+requirements-completed: [TEST-02]
+
+# Metrics
+duration: 3min
+completed: 2026-03-03
+---
+
+# Phase 04 Plan 01: Queue Unit Tests Summary
+
+**29 unit tests for queue core operations (SetQueue, Add, Insert, Move, Remove, Shuffle, Repeat), navigation logic (Next/Previous in all modes), and SaveState/RestoreState persistence roundtrip**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-03-03T21:57:38Z
+- **Completed:** 2026-03-03T22:00:46Z
+- **Tasks:** 2
+- **Files modified:** 3
+
+## Accomplishments
+- 14 core operation tests: SetQueue (3 variants), AddTrack, InsertTracksAt (before/after current), MoveQueueTracks (forward/backward/current), RemoveTrack (normal/current), Clear, ToggleShuffle, CycleRepeat
+- 9 navigation tests: nextIndex/previousIndex in RepeatOff/RepeatAll/RepeatOne modes, shuffle navigation, generateShuffleOrder property validation (all indices, no duplicates, current at [0])
+- 6 persistence roundtrip tests: full state fidelity, empty/single/10-track edge cases, overwrite semantics, no-prior-save safety
+- All 29 tests pass with `-race` flag
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Queue core operations and navigation tests** - `8d60dc0` (test)
+2. **Task 2: Queue persistence round-trip tests** - `77cc993` (test)
+
+## Files Created/Modified
+- `backend/queue/queue_test.go` - Core operation tests + mock TrackLoader + setupTestQueue/seedAudioFiles helpers
+- `backend/queue/navigation_test.go` - Navigation edge case tests + shuffle order property tests
+- `backend/queue/persistence_test.go` - SaveState/RestoreState roundtrip fidelity tests
+
+## Decisions Made
+- Used internal tests (`package queue`) to access unexported fields (shuffleOrder, mu) — necessary for shuffle verification and roundtrip assertions
+- Navigation tests bypass DB entirely using direct struct construction for fast, focused tests
+- Roundtrip test asserts on shuffleOrder (JSON-serialized) to ensure Phase 7 refactoring won't silently lose shuffle state
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+- Queue test safety net complete — ready for Phase 7 (PERF-01) incremental persistence refactoring
+- Test helpers (mockTrackLoader, seedAudioFiles) available for reuse in Plan 04-02 (config/player tests)
+- Ready for Plan 04-02 execution
+
+---
+*Phase: 04-queue-config-player-tests*
+*Completed: 2026-03-03*