Slave Rift

<?phpnamespace App\Tests;use App\Game\ScoreNumber;use PHPUnit\Framework\TestCase;final class ScoreNumberTest extends TestCase{    public function testFormatsOrdinaryIdleStyleScores(): void    {        self::assertSame('1.23K', (new ScoreNumber(1234.0))->format());        self::assertSame('987.00M', (new ScoreNumber(987000000.0))->format());    }    public function testMultipliesFarBeyondNativeFloatRange(): void    {        $score = ScoreNumber::fromParts(9.9, 400)->multiply(12.0);        self::assertEqualsWithDelta(1.188, $score->mantissa, 0.000001);        self::assertSame(402, $score->exponent);        self::assertSame('1.19e402', $score->format());    }    public function testAddsAlignedHugeValuesWithoutReconstructingThem(): void    {        $score = ScoreNumber::fromParts(5.0, 250);        $score->add(ScoreNumber::fromParts(2.5, 249));        self::assertEqualsWithDelta(5.25, $score->mantissa, 0.000001);        self::assertSame(250, $score->exponent);    }    public function testNegligibleTermsDoNotDestabiliseHugeScore(): void    {        $score = ScoreNumber::fromParts(7.0, 500);        $score->add(ScoreNumber::fromParts(9.0, 480));        self::assertSame(7.0, $score->mantissa);        self::assertSame(500, $score->exponent);    }}