PHP Decode

<?php
declare(strict_types=1);

namespace KafkaTest\Protocol;

use Kafka\Protocol\DescribeGroups;
use PHPUnit\Framework\TestCase;
use function bin2hex;
use function hex2bin;
use function json_encode;

final class DescribeGroupsTest extends TestCase
{
    /**
     * @var DescribeGroups
     */
    private $describe;

    public function setUp(): void
    {
        $this->describe = new DescribeGroups('0.9.0.1');
    }

    public function testEncode(): void
    {
        $data = ['test'];

        $test = $this->describe->encode($data);
        self::assertSame('0000001d000f00000000000f00096b61666b612d70687000000001000474657374', bin2hex($test));
    }

    public function testEncodeEmptyArray(): void
    {
        $data = [];

        $test = $this->describe->encode($data);
        self::assertSame('00000017000f00000000000f00096b61666b612d70687000000000', bin2hex($test));
    }

    public function testDecode(): void
    {
        $data     = '0000000100000004746573740006537461626c650008636f6e73756d6572000567726f757000000001002e6b61666b612d7068702d34646133393366622d333763662d343263632d393064642d37626636626133316664333000096b61666b612d706870000a2f3132372e302e302e31000000100000000000010004746573740000000000000018000000000001000474657374000000010000000000000000';
        $expected = '[{"errorCode":0,"groupId":"test","state":"Stable","protocolType":"consumer","protocol":"group","members":[{"memberId":"kafka-php-4da393fb-37cf-42cc-90dd-7bf6ba31fd30","clientId":"kafka-php","clientHost":"\/127.0.0.1","metadata":{"version":0,"topics":["test"],"userData":""},"assignment":{"version":0,"partitions":[{"topicName":"test","partitions":[0]}],"userData":""}}]}]';

        $test = $this->describe->decode(hex2bin($data));
        self::assertJsonStringEqualsJsonString($expected, json_encode($test));
    }
}
 ?>