feat(RegExp): expose match indexes in Dart

modules/angular2/test/facade/lang_spec.js

@@ -0,0 +1,24 @@
+import {describe, it, expect, beforeEach, ddescribe, iit, xit, el} from 'angular2/test_lib';
+
+import {ListWrapper} from 'angular2/src/facade/collection';
+import {isPresent, RegExpWrapper, RegExpMatcherWrapper} from 'angular2/src/facade/lang';
+
+export function main() {
+  describe('RegExp', () => {
+    it('should expose the index for each match', () => {
+      var re = RegExpWrapper.create('(!)');
+      var matcher = RegExpWrapper.matcher(re, '0!23!567!!');
+      var indexes = [];
+      var m;
+
+      while (isPresent(m = RegExpMatcherWrapper.next(matcher))) {
+        ListWrapper.push(indexes, m.index);
+        expect(m[0]).toEqual('!');
+        expect(m[1]).toEqual('!');
+        expect(m.length).toBe(2);
+      }
+
+      expect(indexes).toEqual([1, 4, 8, 9]);
+    })
+ });
+}