PHPUnit and “Cannot regenerate session ID”

I am testing en event of login form sending (inspired by similar test in Návštěvní kniha v Nette s testy (TDD))

Problem is that even though I have started session in bootstrap.php (container->session->start()), the output after running tests reads:

<?php
AuthenticationPresenterTest::testLoginForm()
Nette\InvalidStateException: Cannot regenerate session ID after HTTP headers have been sent (output started at E:\...\php\pear\PHPUnit\Util\Printer.php:173).
?>

I am not sure if this problem is in Nette or PHPUnit. The form is submitted and AuthenticationPresenter::loginFormSubmitted(form) function tries to login the user ($this->getUser()->login(...) is called). The problem starts here and the error message (written above) is thrown on the line with “print($buffer);” (Printer.php:173). I tried using condition \Nette\Environment::getSession()->isStarted() before the print with no result (but test works when condition is negated!).

Please, is there a way how to solve this? Thank you

My test code:

<?php
    public function testLoginForm()
    {
        $requestData = array(
            'action' => 'login',
            'do' => 'loginForm-submit',
            ...
        );
        $request = new Request('Authentication', 'POST', $requestData, $requestData);
        $response = $this->presenter->run($request);

        self::assertInstanceOf(
                'Nette\Application\Responses\RedirectResponse', $response
        );
    }
?>

Last edited by OndrejSlamecka (2012-01-10 23:06)