---
phase: quick-4
plan: 01
subsystem: testing
tags: [proptest, ci, coverage, cargo-llvm-cov]

# Dependency graph
requires:
  - phase: quick-3
    provides: CI pipeline fixes (cargo-deny licenses, Windows restart test)
provides:
  - Green Code Quality CI pipeline on main branch
  - Fixed proptest assertions to match ordinal GROUP BY behavior
affects: []

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "GROUP BY uses ordinal positions in expand() to avoid alias ambiguity"

key-files:
  created: []
  modified:
    - tests/expand_proptest.rs
    - .gitignore

key-decisions:
  - "Proptest bug, not code bug: dimensions_control_aggregation incorrectly asserted expressions in GROUP BY; expand() intentionally uses ordinal positions"

patterns-established:
  - "Proptest assertions should verify ordinal GROUP BY positions, not raw expressions"

requirements-completed: [QUICK-4]

# Metrics
duration: 36min
completed: 2026-02-28
---

# Quick Task 4: Check CI Results and Fix Coverage Summary

**Fixed proptest assertion bug in dimensions_control_aggregation that incorrectly checked for expressions in ordinal GROUP BY clause, making Code Quality CI fully green**

## Performance

- **Duration:** 36 min (mostly waiting for CI runs)
- **Started:** 2026-02-28T21:05:55Z
- **Completed:** 2026-02-28T21:41:55Z
- **Tasks:** 2
- **Files modified:** 2

## Accomplishments
- Diagnosed CI run 22528925235 failure: proptest bug, not a coverage threshold or code issue
- Fixed `dimensions_control_aggregation` proptest to verify ordinal GROUP BY positions instead of raw expressions
- Added `**/*.proptest-regressions` to .gitignore
- Verified all 61 tests pass locally (54 unit + 6 proptest + 1 doctest)
- Pushed fix and confirmed CI run 22529263743 passes all steps (fmt, clippy, cargo-deny, coverage >= 80%)

## CI Run History

| Run ID | Commit | Status | Notes |
|--------|--------|--------|-------|
| 22518937398 | f3a3ee1 | Cancelled | Superseded by newer push |
| 22528925235 | d080d2b | Failed | Proptest `dimensions_control_aggregation` assertion mismatch |
| 22529263743 | 652e7d2 | **Success** | All steps green after fix |

## Task Commits

Each task was committed atomically:

1. **Task 1: Check CI run result and diagnose failures** - No commit (diagnosis only, no file changes)
2. **Task 2: Fix proptest assertion bug** - `652e7d2` (fix)

## Files Created/Modified
- `tests/expand_proptest.rs` - Fixed `dimensions_control_aggregation` to verify ordinal GROUP BY positions and dimension expressions in SELECT
- `.gitignore` - Added `**/*.proptest-regressions` pattern

## Decisions Made
- The failure was a test bug, not a code bug. The `expand()` function intentionally uses ordinal positions (`GROUP BY 1, 2, ...`) to avoid ambiguity when an expression matches its alias (e.g., `status AS "status"`). The proptest incorrectly looked for raw dimension expressions in the GROUP BY section.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 2 - Missing Critical] Added proptest-regressions to .gitignore**
- **Found during:** Task 2
- **Issue:** proptest generates `.proptest-regressions` files on failure; these were not gitignored and could be accidentally committed
- **Fix:** Added `**/*.proptest-regressions` to .gitignore
- **Files modified:** .gitignore
- **Verification:** `git status` no longer shows the file
- **Committed in:** 652e7d2 (part of Task 2 commit)

---

**Total deviations:** 1 auto-fixed (1 missing critical)
**Impact on plan:** Minor addition to keep repo clean. No scope creep.

## Issues Encountered
- CI run 22518937398 (originally specified) was cancelled; found superseding run 22528925235 which contained the actual failure
- The failure was NOT a coverage threshold issue as anticipated by the plan, but a proptest assertion logic error

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- Code Quality CI is fully green on main
- All tests pass (61/61)
- Coverage is at or above 80%
- Pipeline is healthy for future development

---
*Phase: quick-4*
*Completed: 2026-02-28*
