# Bug 1 Preservation Property Tests - Results

## Test Execution Summary

**Date**: Task 2 Execution
**Status**: ✅ ALL TESTS PASSED (18/18)
**Code State**: UNFIXED (baseline behavior observation)

## Test Results

### Property 2.1: Stock-In Approvals Increase Total Available MT
**Status**: ✅ PASSED (5/5 test cases)
**Validates**: Requirement 5.1

Tested with quantities: 100 MT, 500 MT, 1000 MT, 2500 MT, 5000 MT

**Observed Behavior**:
- Stock-in approvals correctly increase Total Available MT by the stocked-in quantity
- Total Empty MT correctly decreases by the stocked-in quantity
- Formula verified: `totalAvailableAfter = totalAvailableBefore + quantityMt`
- Formula verified: `totalEmptyAfter = 26000 - totalAvailableAfter`

**Preservation Goal**: ✅ Confirmed - Stock-in functionality works correctly on unfixed code

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### Property 2.2: getSummary() Returns Correct Global Totals
**Status**: ✅ PASSED (5/5 test cases)
**Validates**: Requirement 5.2

Tested configurations:
1. Balances: [5000, 10000, 6000] → Total: 21000 MT, Empty: 5000 MT
2. Balances: [3000, 2000, 1000] → Total: 6000 MT, Empty: 20000 MT
3. Balances: [15000, 8000, 3000] → Total: 26000 MT, Empty: 0 MT
4. Balances: [100, 200, 300] → Total: 600 MT, Empty: 25400 MT
5. Balances: [0, 0, 0] → Total: 0 MT, Empty: 26000 MT

**Observed Behavior**:
- `getSummary()` correctly calculates Total Available MT as sum of all `inventory_balance.currentQuantityMt`
- Total Empty MT correctly calculated as `Math.max(0, 26000 - totalAvailableMt)`
- Global metrics aggregate across all warehouses correctly

**Preservation Goal**: ✅ Confirmed - Global summary calculations work correctly on unfixed code

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### Property 2.3: getExpiry() Aggregates Batch Quantities Across Warehouses
**Status**: ✅ PASSED (2/2 test cases)
**Validates**: Requirement 5.3

Test Case 1: Single batch across 3 warehouses
- Warehouse A: 1,900 MT
- Warehouse B: 8,100 MT
- Warehouse C: 8,000 MT
- **Result**: Correctly aggregated to 18,000 MT total

Test Case 2: Multiple batches across 2 warehouses
- BATCH-A: 500 MT (Warehouse X) + 1,500 MT (Warehouse Y) = 2,000 MT total
- BATCH-B: 1,000 MT (Warehouse X only)
- **Result**: Correctly aggregated per batch across warehouses

**Observed Behavior**:
- `getExpiry()` aggregates batch quantities across all warehouses
- Warehouse field lists all warehouses containing the batch
- Total MT represents sum across all warehouses, not warehouse-specific

**Preservation Goal**: ✅ Confirmed - Expiry tracking aggregates correctly across warehouses on unfixed code

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### Property 2.4: getInventory() Displays Per-Batch Records Correctly
**Status**: ✅ PASSED (1/1 test case)
**Validates**: Requirement 5.4

Tested with 3 batches:
- BATCH-001: 5,000 MT
- BATCH-002: 10,000 MT
- BATCH-003: 3,000 MT

**Observed Behavior**:
- `getInventory()` displays per-batch inventory records correctly
- Each record shows correct `availableMt` from `inventory_balance.currentQuantityMt`
- Threshold progress percentage calculated correctly
- All batch metadata (warehouse, item, batch number, expiry) displayed correctly

**Preservation Goal**: ✅ Confirmed - Inventory table displays per-batch records correctly on unfixed code

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### Property 2.5: Total Empty MT Calculation Without Transactions
**Status**: ✅ PASSED (5/5 test cases)
**Validates**: Requirement 5.2

Tested scenarios:
1. Total Available: 21,000 MT → Empty: 5,000 MT
2. Total Available: 10,000 MT → Empty: 16,000 MT
3. Total Available: 26,000 MT → Empty: 0 MT
4. Total Available: 0 MT → Empty: 26,000 MT
5. Total Available: 15,500 MT → Empty: 10,500 MT

**Observed Behavior**:
- Total Empty MT correctly calculated as `Math.max(0, 26000 - totalAvailableMt)`
- Formula holds: `totalAvailableMt + totalEmptyMt = 26000`
- Calculation works correctly without any transactions

**Preservation Goal**: ✅ Confirmed - Baseline Total Empty MT calculation works correctly on unfixed code

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## Summary

### Overall Status: ✅ ALL PRESERVATION TESTS PASSED

**Total Test Cases**: 18
**Passed**: 18
**Failed**: 0

### Key Findings

1. **Stock-In Functionality**: Works correctly on unfixed code - Total Available MT increases and Total Empty MT decreases as expected

2. **Global Metrics**: `getSummary()` correctly calculates totals across all warehouses using `inventory_balance` records

3. **Expiry Tracking**: `getExpiry()` correctly aggregates batch quantities across warehouses (not warehouse-specific)

4. **Inventory Display**: `getInventory()` correctly displays per-batch records with accurate quantities

5. **Baseline Calculation**: Total Empty MT calculation works correctly when no transactions are involved

### Preservation Requirements Validated

- ✅ **Requirement 5.1**: Stock-in approvals increase Total Available MT correctly
- ✅ **Requirement 5.2**: `getSummary()` returns correct global totals across all warehouses
- ✅ **Requirement 5.3**: `getExpiry()` aggregates batch quantities across warehouses
- ✅ **Requirement 5.4**: `getInventory()` displays per-batch records correctly

### Next Steps

These tests establish the baseline behavior that MUST be preserved after implementing the fix for Bug 1. After the fix is implemented:

1. Re-run these preservation tests (Task 3.3)
2. **Expected Outcome**: All tests should still PASS
3. If any test fails, it indicates a regression - the fix broke existing functionality
4. The fix should ONLY affect stock-out approvals (Bug Condition 1), not stock-in or other operations

### Test Coverage

The property-based testing approach provides strong guarantees:
- Multiple test cases per property (5-18 cases total)
- Various input ranges tested (100 MT to 26,000 MT)
- Edge cases covered (0 MT, full capacity, multiple warehouses)
- Comprehensive validation of preservation requirements

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**Conclusion**: The unfixed code correctly handles all non-buggy operations (stock-in, global summaries, expiry tracking, inventory display). These behaviors must remain unchanged after fixing Bug 1.