public @Test void testAlternatorTool() {
AlternatorTool alternatorTool = (AlternatorTool)toolbox.get("alternator");
assertNotNull(alternatorTool);
/* test automatic alternator */
Alternator auto = alternatorTool.auto(new String[] {"red","blue","yellow"});
assertStringEquals("red", auto.getCurrent());
assertStringEquals("red", auto.getNext());
assertStringEquals("blue", auto);
assertStringEquals("yellow", auto);
assertStringEquals("red", auto);