def METHOD_NAME(self):
    vmParams = {
        'vmId': None,
        'xml': self.domain_xml,
    }
    vm = FakeVM(self.cif, vmParams)
    self.cif.vmContainer[self.uuid] = vm
    try:
        res = self.vm.create(vmParams)
        self.assertTrue(response.is_error(res, 'exist'))
    finally:
        del self.cif.vmContainer[self.uuid]
    self.assertEqual(self.cif.vmContainer, {})