public function testPageDataCanBeAccessed()
 {
     $_POST['signed_request'] = $this->rawSignedRequestAuthorized;
     $helper = new FacebookPageTabHelper('123', 'foo_app_secret');
     $this->assertTrue($helper->isLiked());
     $this->assertFalse($helper->isAdmin());
     $this->assertEquals('42', $helper->getPageId());
     $this->assertEquals('42', $helper->getPageData('id'));
     $this->assertEquals('default', $helper->getPageData('foo', 'default'));
 }