ldc-mesbr-app/tests/Unit/Domain/Models/ValueObjects/Coupon/CouponCodeTest.php

<?php

declare(strict_types=1);

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

use Domain\Models\ValueObjects\Coupon\CouponCode;

covers(CouponCode::class);

describe('coupon code', function (): void {
    it('creates a valid coupon code', function (): void {
        // GIVEN
        $value = 'AAA01';

        // WHEN
        $code = new CouponCode($value);

        // THEN
        expect($code)->toBeInstanceOf(CouponCode::class)
            ->and($code->value)->toBe($value);
    });
});

describe('coupon code validation rules', function (): void {
    it('rejects invalid coupon codes', function (string $invalid): void {
        // WHEN / THEN
        expect(fn (): CouponCode => new CouponCode($invalid))->toThrow(\DomainException::class);

        // GIVEN
    })->with([
        // rejects empty strings
        '',
        ' ',
        "\t",
        "\n",
        // rejects numbers only
        '12345',
        '67890',
        // rejects letters only
        'ABCDE',
        'FGHIJ',
        // rejects codes with special characters
        'AB@12',
        'CD#34',
        'EF$56',
        // rejects codes that have the same digit repeated
        'ABC11',
        'DEF22',
        'GHI33',
        // rejects codes with lowercase letters
        'AbC12',
        'dEf34',
        'GhI56',
    ]);

    it('rejects codes with more/less than 3 letters or more/less than 2 digits', function (string $invalid): void {
        // WHEN / THEN
        expect(fn (): CouponCode => new CouponCode($invalid))->toThrow(\DomainException::class);

        // GIVEN
    })->with([
        'ABCD12',
        'ABC123',
        'ABCDE123',
        'AB12',
        'A1',
        'AB1',
        'A12',
        'AB123',
        'A123',
        'ABC1',
        'AB12C',
    ]);
});