public function testSource($container, $contextSource, $expectedSource)
{
$processor = $this->createContaoTableProcessor();
$processor->setContainer($container);
$result = $processor(['context' => ['contao' => new ContaoContext(__METHOD__, null, null, null, null, $contextSource)]]);
/** @var ContaoContext $context */
$context = $result['extra']['contao'];
$this->assertEquals($expectedSource, $context->getSource());
}