res.Write([]byte("server not happy"))
			return
		}
		res.WriteHeader(http.StatusOK)
		res.Write([]byte("server happy"))
	}))

	// replace the global CNI client with mock
	newCNIClient = func(address, path string) CNIEventClient {
		c := http.DefaultClient

		eventC := CNIEventClient{
			client: c,
			url:    testServer.URL + path,
		}
		return eventC
	}