<?php

declare(strict_types=1);

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

use Domain\Models\ValueObjects\Period;
use DateTime;

covers(Period::class);

describe('period', function (): void {
    beforeEach(function (): void {
        $this->start = new DateTime('2026-01-01');
        $this->end   = new DateTime('2026-01-31');
    });

    it('creates a valid period', function (): void {
        // GIVEN / WHEN
        $period = new Period(
            $this->start,
            $this->end
        );

        // THEN
        expect($period)->toBeInstanceOf(Period::class)
            ->and($period->start)->toBe($this->start)
            ->and($period->end)->toBe($this->end);
    });

    it('accepts a period whose end equals its start', function (): void {
        // GIVEN
        $start = new DateTime('2026-01-01');
        $end   = new DateTime('2026-01-01');

        // WHEN
        $period = new Period($start, $end);

        // THEN
        expect($period->start)->toBe($start)
            ->and($period->end)->toBe($end);
    });

    it('throws when the end is before the start', function (): void {
        // GIVEN / WHEN / THEN
        expect(fn () => new Period(new DateTime('2026-02-01'), new DateTime('2026-01-01')))
            ->toThrow(\DomainException::class, 'Period end date cannot be before its start date.');
    });
});