SonataAdminBundle/Tests/tests/autoload.php.dist

<?php

// if the bundle is within a symfony project, try to reuse the project's autoload
$autoload = __DIR__.'/../../../../../../app/autoload.php';

// if the bundle is the project, try to use the composer's autoload for the tests
$composerAutoload = __DIR__.'/../../vendor/autoload.php';

if (is_file($autoload)) {
    include $autoload;
} elseif (is_file($composerAutoload)) {
    include $composerAutoload;
} else {
    throw new \Exception('unable to autoload vendors for tests');
}