Reorganized test suite with consolidated benchmarks and comprehensive
edge case coverage, exceeding 95% minimum coverage requirement.
Changes:
- Created benchmark_test.go with all 52 benchmarks organized by category
(arithmetic, clock, date, diff, format, inspection, parse, snap, unit)
- Removed benchmarks from 9 individual test files for better organization
- Added 6 edge case tests to improve coverage:
* Format() unknown type fallback
* formatLong() empty lang default
* Format.String() unknown value
* isYearPrefix() edge cases
* StartOf()/EndOf() unsupported units
- Added 3 DST transition tests:
* Spring forward (23-hour day)
* Fall back (25-hour day)
* Multiple timezone preservation
Results:
- Test coverage: 97.7% → 99.5% (exceeds 95% target)
- All 52 benchmarks consolidated and verified
- All benchmarks meet performance targets
- No test regressions
Files modified:
- Created: benchmark_test.go (580 lines)
- Modified: 9 test files (removed benchmarks, added tests)
- Add Next(weekday) method to jump to next occurrence of a weekday
- Add Prev(weekday) method to jump to previous occurrence of a weekday
- Next ALWAYS returns future date (never today, even if same weekday)
- Prev ALWAYS returns past date (never today, even if same weekday)
- Time of day preserved from source date
- Comprehensive unit tests for all weekday combinations
- Same-weekday edge case tests (Monday.Next(Monday) = next Monday)
- Timezone preservation tests
- Immutability verification tests
- Performance benchmarks (~45ns, well under 1µs target)
- Zero allocations for both operations
- 97.8% test coverage (exceeds 95% requirement)
- Godoc comments with same-weekday behavior examples
All acceptance criteria met:
✓ Next() implemented for all weekdays
✓ Prev() implemented for all weekdays
✓ Next() never returns today (always future)
✓ Prev() never returns today (always past)
✓ Time of day preserved from source
✓ Edge case: Same weekday correctly skips to next/prev week
✓ Unit tests for all weekday combinations
✓ Tests for same weekday edge case
✓ Benchmarks meet <1µs target (~45ns)
✓ Godoc comments with same-weekday behavior example
- Implement StartOf(unit) for Weeks, Months, Quarters, Years
- Implement EndOf(unit) for Weeks, Months, Quarters, Years
- Week snapping follows ISO 8601 (Monday start, Sunday end)
- Month-end handling for all month lengths (28/29/30/31 days)
- Quarter definitions: Q1=Jan-Mar, Q2=Apr-Jun, Q3=Jul-Sep, Q4=Oct-Dec
- Comprehensive unit tests for all units and edge cases
- Leap year handling for February
- Timezone preservation tests
- Immutability verification tests
- Performance benchmarks (all <200ns, well under 1µs target)
- Zero allocations for all operations
- 97.3% test coverage (exceeds 95% requirement)
- Godoc comments with usage examples
All acceptance criteria met:
✓ StartOf(Week) returns Monday 00:00:00
✓ EndOf(Week) returns Sunday 23:59:59
✓ StartOf(Month) returns 1st day 00:00:00
✓ EndOf(Month) handles all month lengths correctly
✓ StartOf(Quarter) returns correct quarter start
✓ EndOf(Quarter) returns correct quarter end
✓ StartOf(Year) returns Jan 1 00:00:00
✓ EndOf(Year) returns Dec 31 23:59:59
✓ Leap year handling for February
✓ Unit tests for all units and edge cases
✓ ISO 8601 week compliance tests
✓ Benchmarks meet <1µs target (all <200ns)
✓ Godoc comments with examples
