@Test
public void should_carry_signal_through_LSHIFT_gate_with_wire_by_value() {

    Circuit circuit = new Circuit("123 -> x\n" +
            "x LSHIFT 2 -> f");
    Optional<SpecificValue> d = circuit.signalOf(new Wire("f"));
    assertThat(d).contains(new SpecificValue(492));
}