Add corelib tests

test/codegen/corelib/string_replace_dollar_test.dart

Index: test/codegen/corelib/string_replace_dollar_test.dart
diff --git a/test/codegen/corelib/string_replace_dollar_test.dart b/test/codegen/corelib/string_replace_dollar_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c0077a05965d7e1ede883b8db9f830eb8ebdfa24
--- /dev/null
+++ b/test/codegen/corelib/string_replace_dollar_test.dart
@@ -0,0 +1,27 @@
+// 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.
+
+import "package:expect/expect.dart";
+
+main() {
+  String jsText = r"""'$'
+""";
+  String htmlStr = '%%DART';
+  String htmlOut = htmlStr.replaceAll("%%DART", jsText);
+  Expect.equals(jsText, htmlOut);
+  htmlOut = htmlStr.replaceFirst("%%DART", jsText);
+  Expect.equals(jsText, htmlOut);
+  htmlOut = htmlStr.replaceAll(new RegExp("%%DART"), jsText);
+  Expect.equals(jsText, htmlOut);
+  htmlOut = htmlStr.replaceFirst(new RegExp("%%DART"), jsText);
+  Expect.equals(jsText, htmlOut);
+
+  // Regression test, http://dartbug.com/17886
+  String doubleDollar = r"$'$`";
+  var string = r"flip-flip-flop";
+  var result = string.replaceFirst("flip", doubleDollar);
+  Expect.equals(r"$'$`-flip-flop", result);
+  result = string.replaceAll("flip", doubleDollar);
+  Expect.equals(r"$'$`-$'$`-flop", result);
+}