Parse comma-separated multiple values.

test/args_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library args_test;
 
 import 'package:unittest/unittest.dart';
 import 'package:args/args.dart';
 import 'utils.dart';
 
@@ skipping 91 matching lines @@
 
     test('throws ArgumentError if an option name is invalid', () {
       var parser = new ArgParser();
 
       for (var name in _INVALID_OPTIONS) {
         var reason = '${Error.safeToString(name)} is not valid';
         throwsIllegalArg(() => parser.addOption(name), reason: reason);
       }
     });
 
+    test('throws ArgumentError if splitCommas is passed with allowMultiple: '
+        'false', () {
+      var parser = new ArgParser();
+      throwsIllegalArg(() => parser.addOption('flummox', splitCommas: true));
+      throwsIllegalArg(() => parser.addOption('flummox', splitCommas: false));
+    });
+
     test('accepts valid option names', () {
       var parser = new ArgParser();
 
       for (var name in _VALID_OPTIONS) {
         var reason = '${Error.safeToString(name)} is valid';
         expect(() => parser.addOption(name), returnsNormally, reason: reason);
       }
     });
   });
 
@@ skipping 182 matching lines @@
 const _VALID_OPTIONS = const [
   'a', // One character.
   'contains-dash',
   'contains_underscore',
   'ends-with-dash-',
   'contains--doubledash--',
   '1starts-with-number',
   'contains-a-1number',
   'ends-with-a-number8'
 ];