VersionPress\Tests\Automation\WpAutomation::getAbspath PHP Method

    public function getAbspath()
    {
        static $abspath = false;
        if ($abspath === false) {
            $abspath = $this->runWpCliCommand('eval', null, ['print(ABSPATH);']) ?: null;
        }
        return $abspath;
    }

 public static function setUpBeforeClass()
 {
     parent::setUpBeforeClass();
     self::$testConfig = TestConfig::createDefaultConfig();
     self::$wpAutomation = new WpAutomation(self::$testConfig->testSite, self::$testConfig->wpCliVersion);
     self::setUpSite();
     DBAsserter::assertFilesEqualDatabase();
     $yamlDir = self::$wpAutomation->getPluginsDir() . '/versionpress/.versionpress';
     $schemaFile = $yamlDir . '/schema.yml';
     $actionsFile = $yamlDir . '/actions.yml';
     $shortcodeFile = $yamlDir . '/shortcodes.yml';
     /** @var $wp_db_version */
     require self::$wpAutomation->getAbspath() . '/wp-includes/version.php';
     if (!function_exists('get_shortcode_regex')) {
         require_once self::$wpAutomation->getAbspath() . '/wp-includes/shortcodes.php';
     }
     self::$schemaInfo = new DbSchemaInfo([$schemaFile], self::$testConfig->testSite->dbTablePrefix, $wp_db_version);
     $actionsInfoProvider = new ActionsInfoProvider([$actionsFile]);
     $changeInfoFactory = new ChangeInfoFactory(self::$schemaInfo, $actionsInfoProvider);
     $dbHost = self::$testConfig->testSite->dbHost;
     $dbUser = self::$testConfig->testSite->dbUser;
     $dbPassword = self::$testConfig->testSite->dbPassword;
     $dbName = self::$testConfig->testSite->dbName;
     $wpdb = new wpdb($dbUser, $dbPassword, $dbName, $dbHost);
     $wpdb->set_prefix(self::$testConfig->testSite->dbTablePrefix);
     self::$database = new Database($wpdb);
     $shortcodesInfo = new ShortcodesInfo([$shortcodeFile]);
     self::$vpidRepository = new VpidRepository(self::$database, self::$schemaInfo);
     self::$shortcodesReplacer = new ShortcodesReplacer($shortcodesInfo, self::$vpidRepository);
     $vpdbPath = self::$wpAutomation->getVpdbDir();
     self::$tableSchemaRepository = new TableSchemaStorage(self::$database, $vpdbPath . '/.schema');
     self::$storageFactory = new StorageFactory($vpdbPath, self::$schemaInfo, self::$database, [], $changeInfoFactory, self::$tableSchemaRepository);
     self::$urlReplacer = new AbsoluteUrlReplacer(self::$testConfig->testSite->url);
 }