Add comprehensive test coverage for untested components

[Copilot]

Generated 28 test files covering previously untested classes and modules, following existing test patterns.

Coverage Added

Models & Relationships (6 tests)

• AppliedCoupon, Discountable, Tax pivot models
• Price meta model with currency formatting
• Property and PropertyValue models

Drivers (8 tests)

• Cart drivers: Cookie, Session, Null
• Payment gateways: Cash, Manual, Transfer
• Shipping: LocalPickup, base Driver

Business Logic (4 tests)

• Traits: AsCustomer, AsOrder, HasPrices, HasProperties
• Order calculations, coupon application, pricing

Infrastructure (10 tests)

• Event listeners: ClearCookies, FormatBazarStubs, RefreshInventory
• HTTP controllers: base Controller, GatewayController
• Notifications: OrderDetails
• Support: Countries, base Driver
• Relations: custom Prices relation
• Actions: SendOrderDetails

Test Structure

All tests follow repository conventions:

• Extend Cone\Bazar\Tests\TestCase
• Use Laravel factories and testing utilities
• Standard setUp/tearDown patterns
• Descriptive test_* method names

public function test_driver_queues_cookie_after_resolution(): void
{
    $cart = $this->driver->getModel();
    $queuedCookies = Cookie::getQueuedCookies();
    
    $this->assertSame('cart_id', $queuedCookies[0]->getName());
    $this->assertSame($cart->getKey(), $queuedCookies[0]->getValue());
}

Stats: 49 test files (previously 21), +1,950 lines of test code

Original prompt

Could you generate the missing tests based on the current test suite?

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