ldc-arcadia-api/tests/Unit/Domain/Models/ValueObjects/Inco/PortionAmountTest.php

<?php

declare(strict_types=1);

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

use Domain\Models\ValueObjects\Inco\PortionAmount;

covers(PortionAmount::class);

describe('PortionAmount Value Object Instantiation', function (): void {
    it('can be instantiated with low and high parts', function (): void {
        // GIVEN & WHEN
        $portion = new PortionAmount(100.0, 150.0, true);

        // THEN
        expect($portion->lowPart())->toBe(10000)
            ->and($portion->highPart())->toBe(15000)
            ->and($portion->approximative())->toBeTrue();
    });
});

describe('PortionAmount Value Object Domain Rules', function (): void {
    it('throws DomainException for negative lowPart', function (): void {
        // GIVEN, WHEN & THEN
        expect(fn () => new PortionAmount(-1.0))
            ->toThrow(\DomainException::class, 'lowPart must be between 0 and');
    });

    it('throws DomainException for negative highPart', function (): void {
        // GIVEN, WHEN & THEN
        expect(fn () => new PortionAmount(100.0, -1.0))
            ->toThrow(\DomainException::class, 'highPart must be between 0 and');
    });

    it('throws DomainException for lowPart greater than highPart', function (): void {
        // GIVEN, WHEN & THEN
        expect(fn () => new PortionAmount(150.0, 100.0))
            ->toThrow(\DomainException::class, 'lowPart cannot be greater than highPart');
    });

    it('throws DomainException for lowPart exceeding maximum value', function (): void {
        // GIVEN
        $maxMask  = (1 << 15) - 1;
        $scale    = (int) pow(10, 2);
        $maxValue = (float) bcdiv((string) $maxMask, (string) $scale, 2);

        // WHEN & THEN
        expect(fn () => new PortionAmount($maxValue + 0.01))
            ->toThrow(\DomainException::class, "lowPart must be between 0 and '{$maxValue}'");
    });

    it('throws DomainException for highPart exceeding maximum value', function (): void {
        // GIVEN
        $maxMask  = (1 << 15) - 1;
        $scale    = (int) pow(10, 2);
        $maxValue = (float) bcdiv((string) $maxMask, (string) $scale, 2);

        // WHEN & THEN
        expect(fn () => new PortionAmount(100.0, $maxValue + 0.01))
            ->toThrow(\DomainException::class, "highPart must be between 0 and '{$maxValue}'");
    });
});