nextcloud-server/tests/bootstrap.php

<?php
define('PHPUNIT_RUN', 1);

$configDir = getenv('CONFIG_DIR');
if ($configDir) {
	define('PHPUNIT_CONFIG_DIR', $configDir);
}

require_once __DIR__ . '/../lib/base.php';

\OC::$composerAutoloader->addPsr4('Test\\', OC::$SERVERROOT . '/tests/lib/', true);
\OC::$composerAutoloader->addPsr4('Tests\\', OC::$SERVERROOT . '/tests/', true);

// load all enabled apps
\OC_App::loadApps();

if (!class_exists('PHPUnit_Framework_TestCase')) {
	require_once('PHPUnit/Autoload.php');
}

OC_Hook::clear();

set_include_path(get_include_path() . PATH_SEPARATOR . '/usr/share/php');