# Phase 4 Testing Results - Basic Sales & POS

## Test Date
December 16, 2024

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## Test Summary

Phase 4 sales functionality tested successfully! ✅

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## ✅ Sales Service Tests

### Create Sale
- **Endpoint:** POST /api/sales
- **Status:** ✅ PASS
- **Request:**
  ```json
  {
    "sale_type": "POS",
    "items": [
      {
        "product_id": 1,
        "quantity": 2,
        "unit_price": 1000
      }
    ]
  }
  ```
- **Result:**
  - Sale created successfully with invoice number
  - Inventory reserved (quantity reduced)
  - Totals calculated correctly (subtotal, VAT, total)
  - Sale items created
  - Sale linked to cashier (user_id)

### Get Sale by ID
- **Endpoint:** GET /api/sales/:id
- **Status:** ✅ PASS
- **Result:**
  - Sale details retrieved successfully
  - Includes sale items with product details
  - Includes customer (if provided)
  - Includes cashier (user) information

### List Sales
- **Endpoint:** GET /api/sales?page=1&limit=5
- **Status:** ✅ PASS
- **Result:**
  - Sales list returned with pagination
  - Filters working (status, customer_id, date range, user_id)
  - Pagination metadata correct

### Cancel Sale
- **Endpoint:** PUT /api/sales/:id/cancel
- **Status:** ✅ PASS
- **Result:**
  - Sale status changed to CANCELLED
  - Inventory released (quantity increased back)
  - Only DRAFT sales can be cancelled
  - System logs updated

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## ✅ Inventory Integration Tests

### Inventory Reservation on Sale Creation
- **Status:** ✅ PASS
- **Result:**
  - Inventory quantity reduced when sale created
  - Inventory movement recorded with reason 'SALE'
  - Reference ID set to sale ID

### Inventory Release on Sale Cancellation
- **Status:** ✅ PASS
- **Result:**
  - Inventory quantity increased when sale cancelled
  - Inventory movement recorded with reason 'SALE_RETURN'
  - Reference ID set to sale ID

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## ✅ Totals Calculation Tests

### Sale Totals
- **Status:** ✅ PASS
- **Result:**
  - Subtotal calculated correctly (sum of line totals)
  - VAT calculated correctly (sum of VAT amounts)
  - Total calculated correctly (subtotal + VAT)
  - Totals rounded to 2 decimal places

### Item Totals
- **Status:** ✅ PASS
- **Result:**
  - Line total calculated (quantity * unit_price)
  - VAT amount calculated (line_total * vat_rate / 100)
  - VAT rate retrieved from tax category or product default

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## ✅ Invoice Number Generation Tests

### Unique Invoice Numbers
- **Status:** ✅ PASS
- **Result:**
  - Invoice numbers generated in format: INV-YYYYMMDD-XXXXX
  - Sequential numbering per day
  - Unique invoice numbers

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## ✅ Error Handling Tests

### Insufficient Stock Error
- **Endpoint:** POST /api/sales (with quantity exceeding stock)
- **Status:** ✅ PASS
- **Result:**
  - Correctly rejected sale creation
  - Returned appropriate error message
  - Inventory quantity unchanged

### Validation Errors
- **Status:** ✅ PASS
- **Result:**
  - Missing required fields return validation errors
  - Invalid data types return validation errors
  - Proper error messages

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## 📊 Test Coverage Summary

| Endpoint | Method | Status | Notes |
|----------|--------|--------|-------|
| /api/sales | POST | ✅ PASS | Creates sale, reserves inventory |
| /api/sales/:id | GET | ✅ PASS | Returns sale with items |
| /api/sales | GET | ✅ PASS | Lists sales with filters |
| /api/sales/:id/cancel | PUT | ✅ PASS | Cancels sale, releases inventory |

**Total Tests:** 4 core endpoints + integration tests  
**Passed:** All  
**Failed:** 0  
**Pass Rate:** 100%

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## 🎯 Functionality Verified

### Core Features
- ✅ Sale creation with items
- ✅ Inventory reservation on sale creation
- ✅ Inventory release on sale cancellation
- ✅ Total calculation (subtotal, VAT, total)
- ✅ Invoice number generation
- ✅ Sale listing with filters
- ✅ Sales linked to cashier (user_id)

### Business Logic
- ✅ Only DRAFT sales can be cancelled
- ✅ Prevents negative inventory
- ✅ Transaction support for data integrity
- ✅ VAT calculation from tax categories
- ✅ Multiple items in sale

### Data Integrity
- ✅ Inventory movements logged correctly
- ✅ System logs record all changes
- ✅ Totals calculated correctly
- ✅ Associations (product, customer, user) included

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## ✅ All Systems Operational

**Phase 4:** Basic Sales & POS - ✅ COMPLETE AND TESTED

All sales functionality tested and verified working correctly!

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## Notes

- Sales are created with DRAFT status initially
- Inventory is reserved on sale creation (reduced)
- Inventory is released on sale cancellation (increased)
- Invoice numbers are unique and sequential per day
- All operations logged to system logs for audit trail
- Transaction support ensures data integrity

