new_contents: import os
  import sysctl
  from sysctl.tests import SysctlTestBase
  
  
  class TestSysctlANum(SysctlTestBase):
  
      def test_sysctl_setvalue(self):
          dummy = sysctl.filter('kern.dummy')[0]
          try:
              self.command("/sbin/sysctl kern.dummy=0")
          except:
              if os.getuid() == 0:
                  raise
  
          try:
              dummy.value = 1
          except TypeError:
              if os.getuid() == 0:
                  raise
  
          if os.getuid() == 0:
              value = int(self.command("/sbin/sysctl -n kern.dummy"))
              if value != 1:
                  raise ValueError("Failed to set kern.dummy")
  
subject: Add test to set a sysctl value