# Preservation Property Tests Results

## Test Execution Date
2025-01-XX (executed on UNFIXED code)

## Summary
✅ **All Preservation Tests PASSED**: 6/6 tests passed, confirming baseline behavior to preserve.

## Preservation Properties Validated

### 1. Global Inventory Metrics (getSummary)
- **Status**: ✅ PASS
- **Behavior**: Returns totals across all warehouses
- **Values Observed**:
  - Total Available MT: 100
  - Total Empty MT: 25,900
  - Threshold Target MT: 26,000
  - Pending Reviews: 5
- **Must Preserve**: This global aggregation must remain unchanged after the fix

### 2. Expiry Reference Modal (getExpiry)
- **Status**: ✅ PASS
- **Behavior**: Aggregates batch quantities across warehouses
- **Must Preserve**: Expiry tracking should continue to show totals across all warehouses

### 3. Batch Exclusion Logic
- **Status**: ✅ PASS
- **Behavior**: Batches with `stockedOut: true` are excluded from results
- **Must Preserve**: This filtering logic must remain unchanged

### 4. Fallback Logic
- **Status**: ✅ PASS
- **Behavior**: Falls back to `inventory_balance.currentQuantityMt` when no sheet data exists
- **Values Observed**: Returns 50 MT from balance when no sheets available
- **Must Preserve**: This fallback mechanism must continue to work

### 5. Single-Warehouse Batches
- **Status**: ✅ PASS
- **Behavior**: Returns correct MT for batches that exist in only one warehouse
- **Values Observed**: 400 bags × 25kg / 1000 = 10 MT
- **Must Preserve**: Single-warehouse batches should continue to work correctly (they work by coincidence on unfixed code)

### 6. Other Inventory Service Methods
- **Status**: ✅ PASS
- **Behavior**: `getBatches()` in `inventory.service.ts` already uses warehouse-specific calculation
- **Values Observed**: Returns 25 MT for warehouse 1 (1000 bags × 25kg / 1000)
- **Must Preserve**: This method already works correctly and should remain unchanged

## Conclusion

All preservation tests pass on the unfixed code, establishing the baseline behavior that must be preserved after implementing the fix.

The fix should:
1. ✅ NOT change global inventory summary calculations
2. ✅ NOT change expiry reference aggregation
3. ✅ NOT change batch exclusion logic
4. ✅ NOT change fallback to inventory_balance
5. ✅ NOT break single-warehouse batch calculations
6. ✅ NOT affect other inventory service methods

## Next Steps

1. ✅ Task 1 Complete: Bug condition exploration test
2. ✅ Task 2 Complete: Preservation property tests
3. ⏭️ Task 3: Implement the fix in `findBatches` method
4. ⏭️ Task 4: Verify all tests pass after fix