func testCleanup(t *testing.T, g *graph.Graph, cmds []helper.Cmd, names []string) {
	// cleanup side on the test
	testPassed := false
	onChange := func(ws *websocket.Conn) {
		g.Lock()
		defer g.Unlock()

		if !testPassed {
			clean := true
			for _, name := range names {
				n := g.LookupFirstNode(graph.Metadata{"Name": name})
				if n != nil {
					clean = false
					break
				}
			}

			if clean {
				testPassed = true

				ws.Close()
			}
		}
	}

	testTopology(t, g, cmds, onChange)
	if !testPassed {
		t.Error("test not executed or failed")
	}

	helper.CleanGraph(g)
}