@Before public void setUp() { instance = new Max(); inputNeurons = new ArrayList<>(4); for (int i = 0; i < 4; i++) inputNeurons.add(new InputNeuron()); Neuron toNeuron = new Neuron(); toNeuron.setInputFunction(instance); inputConnections = new ArrayList(4); for (int i = 0; i < 4; i++) { Connection inConn = new Connection(inputNeurons.get(i), toNeuron, 1); inputConnections.add(inConn); toNeuron.addInputConnection(inConn); } }