OrderApiTest_Implementation_Guide.php

<?php

/*
 * ORDER API CODEBASE ASSESSMENT - Story: 01KPFGR1-s-001
 * Analysis of existing Order API for implementing new OrderApiTest.php
 * Date: 2026-04-18
 */

/*
 * FINDINGS SUMMARY
 * ================
 *
 * 1. API ENDPOINT PATHS (CONFIRMED)
 *    - Correct paths: /api/v1/orders (GET, POST)
 *    - DISCREPANCY: Existing tests use /api/orders but routes are /api/v1/orders
 *    - Routes are defined in routes/api.php with v1 prefix
 *
 * 2. VALIDATION RULES (IDENTIFIED)
 *    From app/Http/Requests/CreateOrderRequest.php:
 *    - foreign_currency_amount: required|numeric|min:0
 *    - total_amount: required|numeric|min:0
 *    - currency: required|exists:currencies,currency
 *
 * 3. TEST DATABASE SETUP (ANALYZED)
 *    - Uses RefreshDatabase trait
 *    - Currency seeded in setUp() method
 *    - Test isolation between test methods
 *    - Uses Laravel's testing database configuration
 *
 * 4. EXISTING TEST PATTERNS (DOCUMENTED)
 *    From tests/Feature/OrderTest.php and tests/Feature/CurrencyTest.php:
 *
 *    Pattern 1: API Testing
 *    - postJson('/api/orders', $data) for creating
 *    - getJson('/api/orders') for listing
 *    - assertStatus() for HTTP response codes
 *
 *    Pattern 2: Response Structure Validation
 *    - assertJsonStructure() with expected fields
 *    - Full field list: id, currency, symbol, exchange_rate, surcharge_rate,
 *      foreign_currency_amount, total_amount, surcharge_amount, discount_amount,
 *      discount_rate, created_at, updated_at
 *
 *    Pattern 3: Database Assertions
 *    - assertDatabaseHas() to verify data persistence
 *
 *    Pattern 4: Validation Testing
 *    - Test negative amounts (should fail with 422)
 *    - Test non-numeric inputs (should fail with 422)
 *    - Test invalid currencies (should fail with 404)
 *
 *    Pattern 5: Business Logic Testing
 *    - Verify calculation accuracy
 *    - Test surcharge: totalAmount * surcharge_rate
 *    - Test discount: (totalAmount - surcharge) * discount_rate
 *
 * 5. CONTROLLER ARCHITECTURE
 *    From app/Http/Controllers/OrderController.php:
 *    - Uses Repository pattern (OrderRepository)
 *    - Constructor injection of dependencies
 *    - index() returns repository->findAll()
 *    - store() uses repository->create($request->all())
 *
 * 6. BUSINESS LOGIC IMPLEMENTATION
 *    From app/Repository/OrderRepository.php:
 *    - Currency lookup by code
 *    - Surcharge calculation: totalAmount * currency.surcharge_rate
 *    - Discount calculation: adjustedAmount * currency.discountRate
 *    - Final total: originalTotal - surcharge - discount
 *
 * 7. DATA MODEL
 *    From database/migrations/2018_07_03_134540_create_order_table.php:
 *    - Orders table with decimal precision (13,4) for amounts
 *    - Exchange rates with precision (8,7)
 *    - Currency field limited to 3 characters
 *
 * 8. VALIDATION MIDDLEWARE
 *    From routes/api.php:
 *    - Uses custom validate.request middleware
 *    - Applied before controller method execution
 */

namespace Tests\Feature;

use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;

/*
 * SAMPLE STRUCTURE FOR NEW OrderApiTest.php
 * Based on existing patterns and correcting identified issues
 */
class OrderApiTest extends TestCase
{
    use RefreshDatabase;

    protected function setUp(): void
    {
        parent::setUp();

        /*
         * CURRENCY SEEDING PATTERN (from existing tests)
         * Note: Field name inconsistency found - discountRate vs discount_rate
         */
        // Currency::create([
        //     'currency' => 'ZAR',
        //     'symbol' => 'R',
        //     'exchange_rate' => 0.0751574,
        //     'surcharge_rate' => 0.075,
        //     'discountRate' => 0.03,  // Note: inconsistent with model definition
        // ]);
    }

    /*
     * TEST CASES TO IMPLEMENT (based on analysis)
     * Following existing patterns but using CORRECT endpoints
     */

    public function test_correct_api_endpoint_paths()
    {
        /*
         * CRITICAL: Use /api/v1/orders NOT /api/orders
         * Existing tests have wrong endpoints
         */
        // $response = $this->postJson('/api/v1/orders', $validData);
        // $response = $this->getJson('/api/v1/orders');
    }

    public function test_validation_rules_comprehensive()
    {
        /*
         * Test all CreateOrderRequest validation rules:
         * 1. foreign_currency_amount: required|numeric|min:0
         * 2. total_amount: required|numeric|min:0
         * 3. currency: required|exists:currencies,currency
         */
    }

    public function test_business_logic_calculations()
    {
        /*
         * BUSINESS LOGIC VERIFICATION (from OrderRepository analysis)
         * 1. Surcharge: originalTotal * currency.surcharge_rate
         * 2. Adjusted total: originalTotal - surcharge
         * 3. Discount: adjustedTotal * currency.discountRate
         * 4. Final total: adjustedTotal - discount
         */
    }

    public function test_json_response_structure()
    {
        /*
         * EXPECTED RESPONSE STRUCTURE (from existing tests)
         * Must include all calculated fields
         */
        // ->assertJsonStructure([
        //     'id', 'currency', 'symbol', 'exchange_rate', 'surcharge_rate',
        //     'foreign_currency_amount', 'total_amount', 'surcharge_amount',
        //     'discount_amount', 'discount_rate', 'created_at', 'updated_at'
        // ]);
    }

    public function test_database_persistence()
    {
        /*
         * DATABASE ASSERTION PATTERN (from existing tests)
         */
        // $this->assertDatabaseHas('orders', [
        //     'currency' => 'ZAR',
        //     'foreign_currency_amount' => 1000
        // ]);
    }
}

/*
 * IMPLEMENTATION CHECKLIST FOR NEW OrderApiTest.php
 * ==================================================
 *
 * ✅ Existing test patterns documented
 * ✅ Order API validation rules identified
 * ✅ Current test database setup analyzed
 * ✅ API endpoint paths confirmed (/api/v1/orders)
 *
 * NEXT STEPS:
 * 1. Create OrderApiTest.php using correct /api/v1/orders endpoints
 * 2. Follow RefreshDatabase and setUp() patterns
 * 3. Test all validation rules comprehensively
 * 4. Verify business logic calculations
 * 5. Test JSON response structure matches existing pattern
 * 6. Add database persistence verification
 * 7. Address field naming inconsistency (discountRate vs discount_rate)
 *
 * CRITICAL FIXES NEEDED:
 * - Existing tests use wrong endpoints (/api/orders vs /api/v1/orders)
 * - Field naming inconsistency in Currency model/repository
 */