### Question:
Product extends InputFunction implements Serializable { @Override public double getOutput(List<Connection> inputConnections) { if (inputConnections.size() == 0) { return 0d; } double output = 1d; for (Connection connection : inputConnections) { output *= connection.getInput(); } return output; }  @Override double getOutput(List<Connection> inputConnections);  }### Answer:
@Test public void testGetOutput() { for (int i = 0; i < inputNeurons.size(); i++) { inputNeurons.get(i).setInput(inputs[i]); inputNeurons.get(i).calculate(); } double result = instance.getOutput(inputConnections); assertEquals(expected, result, .000001); }