---
phase: 02-constraint-validation
plan: 02
subsystem: testing
tags: [swift-testing, constraints, edge-cases, api-docs]

# Dependency graph
requires:
  - phase: 02-01
    provides: migrated constraint tests to Swift Testing
provides:
  - 22 comprehensive constraint tests including edge cases
  - API documentation for Phase 4 drag-drop integration
affects: [04-drag-interaction]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - Edge case test naming convention (edge_*)
    - Success criteria verification tests (success_*)

key-files:
  created:
    - ".planning/phases/02-constraint-validation/CONSTRAINT-API.md"
  modified:
    - "SportsTimeTests/Domain/ItineraryConstraintsTests.swift"

key-decisions:
  - "Tests use Swift Testing to match existing project patterns"
  - "Edge case tests cover boundaries: day 0, beyond trip, exact sortOrder, negative/large values"

patterns-established:
  - "Success criteria verification: tests named 'success_*' directly verify ROADMAP success criteria"
  - "Edge case testing: boundary conditions explicitly tested for constraint validation"

# Metrics
duration: 23min
completed: 2026-01-18
---

# Phase 2 Plan 02: Edge Cases and API Documentation Summary

**22 constraint tests with edge case coverage, plus complete API documentation for Phase 4 drag-drop integration**

## Performance

- **Duration:** 23 min
- **Started:** 2026-01-18T20:50:49Z
- **Completed:** 2026-01-18T21:13:45Z
- **Tasks:** 3
- **Files modified:** 2

## Accomplishments
- Added 10 edge case tests covering boundary conditions (single-day trips, day 0, beyond trip, exact sortOrder boundaries, negative/large sortOrders)
- Added 3 success criteria verification tests matching ROADMAP requirements
- Created comprehensive API documentation for Phase 4 drag-drop integration

## Task Commits

Each task was committed atomically:

1. **Task 1: Add edge case tests** - `1320a34` (test)
2. **Task 2: Create API documentation** - `73ed315` (docs)
3. **Task 3: Run full test suite** - No commit (verification only)

## Files Created/Modified
- `SportsTimeTests/Domain/ItineraryConstraintsTests.swift` - Added 10 edge case tests + 3 success criteria tests (now 22 total)
- `.planning/phases/02-constraint-validation/CONSTRAINT-API.md` - API reference for Phase 4

## Decisions Made
- Used Swift Testing framework (matching Phase 1 patterns)
- Edge case tests cover all boundary conditions: day boundaries (0, beyond trip), sortOrder boundaries (exact, negative, large), and trip edge cases (single-day, no games)
- Success criteria tests directly verify ROADMAP success criteria for CONS-01 through CONS-04

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Old XCTest file still existed**
- **Found during:** Task 1 (Add edge case tests)
- **Issue:** Plan 02-01 migrated tests to Swift Testing but didn't delete old XCTest file, causing "filename used twice" build error
- **Fix:** Removed orphaned XCTest file; all tests now in Domain/ItineraryConstraintsTests.swift
- **Files affected:** SportsTimeTests/ItineraryConstraintsTests.swift (removed)
- **Verification:** Build succeeds, all 22 tests pass
- **Committed in:** 1320a34 (Task 1 commit includes correct file)

---

**Total deviations:** 1 auto-fixed (1 blocking)
**Impact on plan:** Blocking issue resolved; no scope creep.

## Issues Encountered
None - plan executed as specified after resolving blocking issue.

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Phase 2 complete: All constraint validation tests passing (22 tests)
- API documentation ready for Phase 4 (CONSTRAINT-API.md)
- Requirements CONS-01 through CONS-04 verified by tests
- Ready for Phase 3 (Visual Flattening) or can proceed directly to Phase 4

---
*Phase: 02-constraint-validation*
*Completed: 2026-01-18*