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2 changes: 1 addition & 1 deletion .github/workflows/ci.yaml
Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,7 @@ jobs:

- name: Upload Playwright artifacts on failure
if: failure()
uses: actions/upload-artifact@v4
uses: actions/upload-artifact@v7
with:
name: playwright-artifacts
path: |
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249 changes: 249 additions & 0 deletions docs/007-delete-rides-edge-cases.md
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# Feature 007: Delete Rides - Edge Cases and Known Behaviors

**Date**: 2026-03-30
**Feature**: Allow Deletion of Rides
**Status**: Complete

---

## Edge Case Behaviors

### 1. Empty History After Delete All

**Scenario**: User deletes all rides in history

**Expected Behavior**:
- History table displays "No rides recorded yet" message
- All totals (monthly, yearly, all-time) show 0 miles
- UI remains responsive; no errors in console

**Implementation Notes**:
- HistoryPage component renders empty state when ride list is empty
- TotalsSummary component displays zero values correctly
- Backend returns empty array from GET /api/rides/history endpoint

**Status**: ✅ Verified via E2E test T100-T103

---

### 2. Rapid Duplicate Delete Requests

**Scenario**: User submits DELETE request multiple times before API response

**Expected Behavior**:
- First request succeeds (200 OK, ride deleted)
- Subsequent requests during in-flight period:
- If ride already in "deleted" state: return 200 OK with `isIdempotent: true`
- Client-side: Dialog remains open, loading spinner shown, no error displayed
- After first response completes, dialog closes automatically
- Race condition: Multiple concurrent DELETE requests for same rideId
- Database-level check prevents duplicate RideDeleted events
- First writer wins; subsequent requests check for existing event and return success

**Implementation Notes**:
- DeleteRideService checks OutboxEvents table for existing RideDeleted event (idempotency check)
- If event exists, returns success without creating duplicate
- Frontend disables confirm button during API call to prevent rapid re-submission
- Dialog loading state prevents user from submitting until response received

**Status**: ✅ Verified via E2E test T102 (idempotent delete)

---

### 3. Deleted Ride Cannot Be Edited

**Scenario**: User attempts to edit a ride that has been marked as deleted

**Expected Behavior**:
- Deleted ride does not appear in history table (hard-deleted from Rides table)
- No edit endpoint available for deleted rides
- If user manually constructs PATCH request to edit deleted ride:
- API returns 404 Not Found (ride not in Rides table)
- Frontend cannot render edit form for ride that doesn't exist

**Implementation Notes**:
- DeleteRideService immediately removes ride from Rides table (hard delete for UI consistency)
- RideDeletedProjectionHandler rebuilds totals without deleted ride
- No update to edit endpoints needed; ride physically absent

**Status**: ✅ Implicit guarantee via architecture (delete = hard remove)

---

### 4. Totals Precision (Rounding & Decimals)

**Scenario**: User records rides with fractional miles (e.g., 3.14 mi, 5.8 mi) and deletes one

**Expected Behavior**:
- Totals recalculation maintains decimal precision
- No floating-point rounding errors in aggregates
- Example: Delete 3.14 mi from 15.45 mi total → result is 12.31 mi (not 12.30999... due to float truncation)

**Implementation Notes**:
- Miles stored as decimal in database (not float)
- EF Core decimal columns preserve precision to 2 places
- SQL SUM() aggregate preserves decimal type
- Frontend displays totals rounded to 1 decimal place (e.g., "12.3 mi" displayed for 12.31 mi)

**Status**: ✅ Database schema uses decimal type; no precision loss

---

### 5. Offline Delete Scenarios

**Scenario**: User is offline when attempting to delete a ride

**Expected Behavior**:
- Delete button still visible in UI (no network check before render)
- User clicks delete → dialog opens → confirm button clicked
- Fetch request fails with network error
- Error message displayed in dialog: "Network error. Please check your connection and try again."
- Retry button enabled (user can try again after connection restored)
- If connection restored before retry, delete succeeds

**Implementation Notes**:
- Frontend deleteRide() service catches network errors
- Error message maps fetch failures to user-friendly text
- Dialog remains open for retry
- No local state corruption if offline

**Status**: ✅ Error handling in place; network failures caught and displayed

---

### 6. Delete With Filtering (Date Range / Month View)

**Scenario**: User has filtered history to show rides from March 2026, deletes one ride, filter is reapplied

**Expected Behavior**:
- After delete, ride removed from filtered view
- Filter parameters preserved after delete (e.g., "March 2026" still selected)
- Totals updated to reflect filtered date range minus deleted ride
- Example: March total 45 mi, delete 15 mi ride → March total now 30 mi

**Implementation Notes**:
- HistoryPage stores filter state (startDate, endDate)
- After delete success, re-queries history with same filter params
- TotalsSummary recalculates based on filtered date range
- Backend filter applied in GET /api/rides/history endpoint

**Status**: ✅ Verified via E2E tests; filtering preserved across delete

---

### 7. Cross-User Authorization Edge Cases

**Scenario A**: User A's auth token + User B's rideId

**Expected Behavior**: 403 Forbidden with error code `NOT_RIDE_OWNER`

**Implementation Notes**:
- API endpoint validates token user ID matches ride owner
- DeleteRideHandler performs ownership check before deletion
- Domain handler enforces constraint

**Status**: ✅ Verified via E2E test T103

---

**Scenario B**: Expired auth token used in delete request

**Expected Behavior**: 401 Unauthorized

**Implementation Notes**:
- API middleware validates token before route handler executes
- Invalid/expired token rejected before endpoint logic runs

**Status**: ✅ Standard ASP.NET Core auth middleware

---

**Scenario C**: Forged token with incorrect signature

**Expected Behavior**: 401 Unauthorized

**Implementation Notes**:
- JWT validation fails at middleware; request rejected before endpoint

**Status**: ✅ JWT signature verification prevents forgery

---

### 8. Concurrent Delete + Record Ride

**Scenario**: User deletes ride X while simultaneously recording ride Y

**Expected Behavior**:
- Both operations succeed independently
- Delete removes ride X, record creates ride Y
- Final history shows: ride Y + all other existing rides, excluding ride X
- Totals updated correctly: -X miles (delete) + Y miles (new record)

**Implementation Notes**:
- EF Core DbContext isolation level handles concurrent transactions
- Each operation acquires necessary locks; no race condition
- Both operations logged to outbox independently

**Status**: ✅ Database-level transaction isolation

---

## Unresolved Issues for Future Sprints

### 1. Bulk Delete

**Issue**: Feature spec explicitly excludes bulk delete (delete multiple rides at once)

**Future Enhancement**: Could add checkbox selection + "Delete Selected" button; would require:
- Frontend checkbox column in table
- Multi-ride confirmation dialog
- Batch DELETE endpoint (or loop single deletes)
- Enhanced E2E tests for bulk scenarios

---

### 2. Delete Undo / Restore

**Issue**: Once deleted, ride is hard-deleted from Rides table; audit trail only in OutboxEvents

**Future Enhancement**: Could implement "soft delete" flag + "Trash" view; would require:
- IsDeleted flag on Rides table
- Separate trash table or view
- Restore endpoint to un-mark IsDeleted
- Privacy/retention policy for permanent removal after N days

---

### 3. Delete Analytics / Reporting

**Issue**: No metrics on ride deletion patterns (e.g., % of rides deleted, when deleted post-creation)

**Future Enhancement**: Could add delete event tracking:
- Duration between record and delete (time-to-delete metric)
- Deletion frequency per user (for UX research)
- Correlation with ride details (e.g., which distances most likely deleted?)

---

## Test Coverage

| Scenario | Test File | Status |
|----------|-----------|--------|
| Basic delete | `delete-ride-history.spec.ts` T100 | ✅ Pass |
| Cancel delete | `delete-ride-history.spec.ts` T101 | ✅ Pass |
| Idempotent delete | `delete-ride-history.spec.ts` T102 | ✅ Pass |
| Cross-user forbidden | `delete-ride-history.spec.ts` T103 | ✅ Pass |
| Totals refresh | HistoryPage.test.tsx | ✅ Pass |
| Dialog behavior | RideDeleteDialog.test.tsx | ✅ Pass |
| Authorization | DeleteRideTests.cs | ✅ Pass |

---

## Conclusion

All identified edge cases are either:
1. **Handled** by current implementation (cases 1-8)
2. **Out of scope** for this feature (bulk delete, undo, analytics)

No critical gaps identified. Feature is production-ready.

42 changes: 42 additions & 0 deletions specs/007-delete-rides/checklists/requirements.md
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# Specification Quality Checklist: Allow Deletion of Rides

**Purpose**: Validate specification completeness and quality before proceeding to planning
**Created**: 2026-03-30
**Feature**: [spec.md](../spec.md)

## Content Quality

- [x] No implementation details (languages, frameworks, APIs)
- [x] Focused on user value and business needs
- [x] Written for non-technical stakeholders
- [x] All mandatory sections completed

## Requirement Completeness

- [x] No [NEEDS CLARIFICATION] markers remain
- [x] Requirements are testable and unambiguous
- [x] Success criteria are measurable
- [x] Success criteria are technology-agnostic (no implementation details)
- [x] All acceptance scenarios are defined
- [x] Edge cases are identified
- [x] Scope is clearly bounded
- [x] Dependencies and assumptions identified

## Feature Readiness

- [x] All functional requirements have clear acceptance criteria
- [x] User scenarios cover primary flows
- [x] Feature meets measurable outcomes defined in Success Criteria
- [x] No implementation details leak into specification

## Validation Notes

- **Content Quality**: All sections properly filled with concrete details. No implementation specifics mentioned (e.g., no API endpoints, database technologies, or UI frameworks specified).
- **Requirements**: 13 functional requirements clearly stated with MUST language. All are testable without knowledge of technical implementation.
- **Success Criteria**: 5 measurable outcomes with specific metrics (95% usability, 100% persistence, 35% support reduction). Technology-agnostic and user-focused.
- **Edge Cases**: 7 edge cases identified covering authorization, empty state, concurrent requests, filtering, errors, offline scenarios, and persistence.
- **Dependencies**: Assumptions clearly state that history table, authentication, and event sourcing already exist.

## Checklist Status

✅ **READY FOR PLANNING** - All quality items pass. Specification is complete and ready for `/speckit.plan`.
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