test rename overhaul: step 7 - corelib tests

tests/corelib/reg_exp_first_match_test.dart

 // Copyright (c) 2011, 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.
 
 // Dart test program for RegExp.firstMatch.
 
 class RegExpFirstMatchTest {
   static testMain() {
     Expect.equals('cat', new RegExp("(\\w+)").firstMatch("cat dog")[0]);
     Expect.equals(null, new RegExp("foo").firstMatch("bar"));
   }
 }
 
 main() {
   RegExpFirstMatchTest.testMain();
 }