docs(02-01): complete constraint test migration plan

Tasks completed: 3/3
- Verified requirements coverage (CONS-01 through CONS-04)
- Migrated 13 tests to Swift Testing (expanded to 22)
- Deleted old XCTest file

SUMMARY: .planning/phases/02-constraint-validation/02-01-SUMMARY.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.planning/phases/02-constraint-validation/02-01-SUMMARY.md

@@ -0,0 +1,113 @@
+---
+phase: 02-constraint-validation
+plan: 01
+subsystem: testing
+tags: [swift-testing, xctest-migration, constraint-validation, itinerary]
+
+# Dependency graph
+requires:
+  - phase: 01-semantic-position
+    provides: SortOrderProvider, ItineraryItem model, semantic position foundation
+provides:
+  - Migrated ItineraryConstraints tests using Swift Testing (@Test/@Suite)
+  - Comprehensive test coverage for CONS-01 through CONS-04
+  - Edge case tests for boundary conditions
+affects: [02-constraint-validation, testing-patterns]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - Swift Testing @Suite/@Test pattern for domain tests
+    - #expect assertions replacing XCTAssert macros
+
+key-files:
+  created: []
+  modified:
+    - SportsTimeTests/Domain/ItineraryConstraintsTests.swift
+
+key-decisions:
+  - "Migrated 13 XCTest tests to Swift Testing matching Phase 1 patterns"
+  - "Added 9 additional edge case and success criteria tests during migration"
+
+patterns-established:
+  - "Constraint tests use MARK comments to organize by requirement (CONS-01 through CONS-04)"
+  - "Edge case tests cover boundary conditions (day 0, day beyond trip, exact sortOrder boundaries)"
+
+# Metrics
+duration: 12min
+completed: 2026-01-18
+---
+
+# Phase 2 Plan 1: Migrate Constraint Tests Summary
+
+**Migrated 13 XCTest constraint tests to Swift Testing and expanded coverage to 22 tests including edge cases and success criteria verification**
+
+## Performance
+
+- **Duration:** 12 min
+- **Started:** 2026-01-18T20:48:00Z
+- **Completed:** 2026-01-18T21:00:00Z
+- **Tasks:** 3
+- **Files modified:** 2
+
+## Accomplishments
+- Migrated all 13 original XCTest constraint tests to Swift Testing
+- Added 9 new edge case tests covering boundary conditions
+- Verified all CONS-01 through CONS-04 requirements have test coverage
+- Standardized test organization with MARK comments by requirement
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 2: Migrate tests to Swift Testing** - `1320a34` (test)
+2. **Task 3: Delete old XCTest file** - `18a1736` (test)
+
+_Note: Task 1 was verification only (no commit needed)_
+
+## Files Created/Modified
+- `SportsTimeTests/Domain/ItineraryConstraintsTests.swift` - Migrated Swift Testing version with 22 tests
+- `SportsTimeTests/ItineraryConstraintsTests.swift` - Deleted (old XCTest version)
+
+## Decisions Made
+- Followed Phase 1 Swift Testing patterns (@Suite, @Test, #expect)
+- Organized tests by requirement using MARK comments
+- Added comprehensive edge case coverage during migration
+
+## Deviations from Plan
+
+### Auto-enhanced Coverage
+
+**1. Additional edge case tests added during migration**
+- **Found during:** Task 2 (migration)
+- **Issue:** Original 13 tests covered requirements but lacked edge case coverage
+- **Enhancement:** Added 9 tests covering:
+  - Single-day trip validation
+  - Day 0 and day-beyond-trip rejection
+  - Exact sortOrder boundary behavior
+  - Travel with no games in either city
+  - Negative and very large sortOrder values
+  - Success criteria verification tests
+- **Files modified:** SportsTimeTests/Domain/ItineraryConstraintsTests.swift
+- **Verification:** All 22 tests pass
+
+---
+
+**Total deviations:** 1 enhancement (additional test coverage)
+**Impact on plan:** Positive - more comprehensive test coverage than originally planned
+
+## Issues Encountered
+None - migration proceeded smoothly.
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- All constraint tests now use Swift Testing
+- Ready for Plan 02 (edge case documentation and API documentation)
+- CONS-01 through CONS-04 requirements fully tested
+
+---
+*Phase: 02-constraint-validation*
+*Completed: 2026-01-18*