Does Site.createPortalUser work in test class?

I am writing a test class to test SiteRegisterController.cls. But registerUser is returning null during testing. What could be the problem? Any thoughts?

Answers:

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Method 1

http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_classes_sites.htm

The test class is clearly documented here.repeating for clarity

 // Test method for verifying the positive test case 

static testMethod void testRegistration() {
    SiteRegisterController controller = new SiteRegisterController();
    controller.username = '<a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="3f4b5a4c4b7f59504d5c5a115c5052">[email protected]</a>';
    controller.email = '<a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="245041575064424b5647410a474b49">[email protected]</a>';
    controller.communityNickname = 'test';
    // registerUser always returns null when the page isn't accessed as a guest user 

    System.assert(controller.registerUser() == null);
    controller.password = 'abcd1234';
    controller.confirmPassword = 'abcd123';
    System.assert(controller.registerUser() == null);
}

As mentioned we will get null when the page is not accessed as a Guest User.You may use System.Runas(GuestUser) to resolve your issue .

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