// tests actual swap algebra
@Test
public void testSelectorSwap2() {
Fields incomingFields = new Fields("0", "1", 2, 3);
Tuple incoming = new Tuple(0, 1, 2, 3);
Fields resultFields = new Fields("0", "1");
Tuple result = new Tuple(0, 1);
Fields remainderFields = incomingFields.subtract(resultFields);
Tuple remainderView = createNarrow(incomingFields.getPos(remainderFields));
Tuple outgoingTuple = createComposite(Fields.asDeclaration(remainderFields), resultFields);
TupleViews.reset(remainderView, incoming);
TupleViews.reset(outgoingTuple, remainderView, result);
assertEquals(new Tuple(2, 3, 0, 1), outgoingTuple);
assertEquals(new Tuple(2, 3, 0, 1), new Tuple(outgoingTuple));
}
