public function testMySqlExtensionNotLoaded()
{
$databaseConfig = ['driver' => 'pdo_mysql'];
$this->config->get('general/database')->willReturn($databaseConfig);
$this->extensionController->databaseDriver('missing', 'MySQL', 'pdo_mysql')->shouldBeCalled();
$this->_validation->expects($this->once())->method('extension_loaded')->will($this->returnValue(false));
$this->validator->check('database');
}