I'm writing a new plugin using this short snippet of code querying VisitsSummary.get API method, but unluckly.

    public static function getVisitsSummary()
    {
        Access::getInstance()->setSuperUserAccess();

        $report = Request::processRequest(self::$method, [
            'idSite' => self::$idSite,
            'date'   => self::$date,
            'period' => self::$period,
        ]);

        return $report;
    }

My unit test is throwing an exception:

Exception: An unexpected website was found in the request: website id was set to '1' .
I've tried passing idSite also as array but with no luck.

I've also tried calling the API directly (but isn't a good practice as shown in docs):

        $report = \Piwik\Plugins\VisitsSummary\API::getInstance()->get(
            self::$idSite,
            self::$date,
            self::$period
        );

In this case I got a more detailed backtrace:

Piwik\Exception\UnexpectedWebsiteFoundException: An unexpected website was found in the request: website id was set to '1' .

/home/dev/piwik/core/Site.php:128
/home/dev/piwik/plugins/SitesManager/API.php:195
/home/dev/piwik/core/Site.php:432
/home/dev/piwik/core/Site.php:494
/home/dev/piwik/core/Archive.php:215
/home/dev/piwik/plugins/VisitsSummary/API.php:28
/home/dev/piwik/plugins/RerVerify2/RerVerify2.php:45
/home/dev/piwik/plugins/RerVerify2/tests/Unit/RerVerifyTest.php:78

Reading the code looks like idSite argument get lost (empty) in its road to Site.php:128 but I can't really say where, because at UnexpectedWebsiteFoundException idSite stills 1.

Any help is appreciated, ciao!