Method.php

<?php
namespace Aoe\AoeDbSequenzer\Xclass;

use Aoe\AoeDbSequenzer\Sequenzer;
use Aoe\AoeDbSequenzer\Service\Typo3Service;
use TYPO3\CMS\Core\Database\Query\QueryBuilder as CoreQueryBuilder;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * @package Aoe\AoeDbSequenzer\Xclass
 */
class QueryBuilder extends CoreQueryBuilder
{
    /**
     * Determines the defined table name without quotation marks (`).
     *
     * @return string
     */
    protected function getTableName()
    {
        $mark = '`';
        $tableName = $this->concreteQueryBuilder->getQueryPart('from')['table'];
        if (!empty($tableName) && $tableName[0] === $mark && $tableName[strlen($tableName) - 1] === $mark) {
            return str_replace($mark, '', $tableName);
        }

        return $tableName;
    }

Test.php

<?php 
namespace Aoe\AoeDbSequenzer\Tests\Functional\Xclass;

use Aoe\AoeDbSequenzer\Xclass\QueryBuilder;
use Doctrine\DBAL\Driver\PDOMySql\Driver;
use Nimut\TestingFramework\TestCase\FunctionalTestCase;
use TYPO3\CMS\Core\Database\Connection;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class QueryBuilderTest extends FunctionalTestCase

    /**
     * @var QueryBuilder
     */
    protected $subject;
  
    /**
     * @test
     */
    public function getTableNameReturnsStringWithoutQuotationMarks()
    {
        $params = [];
        $driver = new Driver();
        $connection = GeneralUtility::makeInstance(Connection::class, $params, $driver);
        $this->subject = $this->getAccessibleMock(QueryBuilder::class, ['dummy'], [$connection]);

        $mockedQueryBuilder = $this->getAccessibleMock(\Doctrine\DBAL\Query\QueryBuilder::class, ['getQueryPart'], [$connection]);
        $mockedQueryBuilder->expects($this->any())->method('getQueryPart')->willReturn($this->returnValue("`tableName`"));

        $this->inject($this->subject, 'concreteQueryBuilder', $mockedQueryBuilder);


        $this->assertEquals(
            'tableName',
            $this->subject->_call('getTableName')
        );
    }