<?php

declare(strict_types=1);

namespace Tests\Unit\Domain\Models\ValueObjects\Coupon;

use Domain\Models\ValueObjects\Coupon\CouponQuantity;

covers(CouponQuantity::class);

describe('coupon quantity', function (): void {
    $quantity         = 10;
    $zeroQuantity     = 0;
    $negativeQuantity = -1;

    it('creates a valid coupon quantity', function () use ($quantity): void {
        // GIVEN / WHEN
        $couponQuantity = new CouponQuantity($quantity);

        // THEN
        expect($couponQuantity)->toBeInstanceOf(CouponQuantity::class)
            ->and($couponQuantity->value)->toBe($quantity);
    });

    it('rejects a quantity of zero', function () use ($zeroQuantity): void {
        // WHEN
        $action = fn (): CouponQuantity => new CouponQuantity($zeroQuantity);

        // THEN
        expect($action)->toThrow(\DomainException::class, 'CouponQuantity quantity must be positive.');
    });

    it('rejects a negative quantity', function () use ($negativeQuantity): void {
        // WHEN
        $action = fn (): CouponQuantity => new CouponQuantity($negativeQuantity);

        // THEN
        expect($action)->toThrow(\DomainException::class, 'CouponQuantity quantity must be positive.');
    });
});