### Question:
GrammarSugar { public static NonTerminal star(Symbol symbol) { return star(symbol, new StarRulesUpdater() { @Override public void updateRules(Rule emptyCase, Rule stepCase) { } }); }  static NonTerminal seq(Symbol... symbols); static NonTerminal optional(Symbol symbol); static NonTerminal plus(Symbol symbol); static NonTerminal star(Symbol symbol); static NonTerminal star(Symbol symbol, StarRulesUpdater updater); static NonTerminal oneOf(Symbol first, Symbol... symbols); static NonTerminal oneOf(OneOfRuleUpdater updater, Symbol first, Symbol... symbols); static NonTerminal separated(Symbol item, Symbol separator); static NonTerminal separated(Symbol item, Symbol separator, boolean atLeastOne); static NonTerminal terminated(Symbol item, Symbol separator); static NonTerminal terminated(Symbol item, Symbol separator, boolean trailingOptional); static NonTerminal terminated(Symbol item, Symbol separator, boolean trailingOptional, boolean emptyStart); static NonTerminal terminated(Symbol item, Symbol separator, Symbol terminator, boolean trailingOptional, boolean emptyStart);  }### Answer:
@Test public void starPart() { Grammar g = new Grammar(); Terminal id = g.newTerminal("id"); Terminal error = g.newTerminal("error"); g.newRule(g.getStart(), star(id)); LRParser parser = new LRParser(new SLRTableGenerator(g).generateTable()); assertFalse(parser.parse(error)); assertEquals("[]", "" + parser.parse(asLexemes(new Terminal[0]))); assertEquals("[id, id, id]", "" + parser.parse(asLexemes(id, id, id))); }