Added the ability to get the names of the options in a set of parsed arguments, and the default val…

tests/lib/args/args_test.dart

Index: tests/lib/args/args_test.dart
===================================================================
--- tests/lib/args/args_test.dart	(revision 10607)
+++ tests/lib/args/args_test.dart	(working copy)
@@ -381,6 +381,22 @@
         var args = parser.parse(['']);
         expect(args['define'], equals(['0']));
       });
+
+      test('queries the default value', () {

[Bob Nystrom, 2012/08/16 22:22:10]

Move these to a separate group for the getDefault() method, please.

[gram, 2012/08/16 23:20:17]

Done.

+        var parser = new ArgParser();
+        parser.addOption('define', defaultsTo:'0', allowMultiple: true);

[Bob Nystrom, 2012/08/16 22:22:10]

Space after ":".

[gram, 2012/08/16 23:20:17]

Done.

+        expect(parser.getDefault('define'), equals('0'));
+        expect(()=>parser.getDefault('undefine'),

[Bob Nystrom, 2012/08/16 22:22:10]

If it's OK with you, I would make this a separate test:

test('throws if you pass an unknown option name', () { ... {)

[gram, 2012/08/16 23:20:17]

Done.

+            throwsIllegalArgumentException);
+      });
+
+      test('queries the set options', () {

[Bob Nystrom, 2012/08/16 22:22:10]

This should be a separate group for the ".options" getter too.

[gram, 2012/08/16 23:20:17]

Done.

+        var parser = new ArgParser();
+        parser.addFlag('woof', defaultsTo: false);
+        parser.addOption('meow', defaultsTo: 'kitty');
+        var args = parser.parse([]);
+        expect(args.options, hasLength(2));
+      });
     });
 
     group('remaining args', () {