public function testGetAllElements()
 {
     Session::clear_all();
     // Remove all session that might've been set by the test harness
     Session::set('Test', 'Test');
     Session::set('Test-2', 'Test-2');
     $session = Session::get_all();
     unset($session['HTTP_USER_AGENT']);
     $this->assertEquals($session, array('Test' => 'Test', 'Test-2' => 'Test-2'));
 }