Temporarily reintroduce IndexOutOfRangeError matcher in unittests.

lib/core/errors.dart

Index: lib/core/errors.dart
diff --git a/lib/core/errors.dart b/lib/core/errors.dart
index c5164262b001829302b756feef6d9150f6e55322..5984e1249c12098aff23ded917a9e3f39e59eac8 100644
--- a/lib/core/errors.dart
+++ b/lib/core/errors.dart
@@ -44,9 +44,9 @@ class CastError implements Error {
 /**
  * Exception thrown because of an index outside of the valid range.
  *
- * Temporarily extends [Exception] for backwards compatiblity.
+ * Temporarily implements [IndexOutOfRangeException] for backwards compatiblity.
  */
-class RangeError extends ArgumentError implements Exception {
+class RangeError extends ArgumentError implements IndexOutOfRangeException {
   // TODO(lrn): This constructor should be called only with string values.
   // It currently isn't in all cases.
   /** Create a new [RangeError] with the given [message]. */
@@ -63,11 +63,9 @@ class RangeError extends ArgumentError implements Exception {
  *
  * This class allows code throwing the old [IndexOutOfRangeException] to
  * work until they change to the new [RangeError] name.
- * Code **catching** IndexOutOfRangeException will fail to catch
- * the [RangeError] objects that are now thrown.
  */
-class IndexOutOfRangeException extends ArgumentError {
-  IndexOutOfRangeException(var message) : super(message);
+interface IndexOutOfRangeException implements Exception default RangeError {

[Søren Gjesse, 2012/11/02 08:14:57]

interface still works?

[Lasse Reichstein Nielsen, 2012/11/02 08:20:29]

Yes. Redirecting factory constructors don't work yet in dart2js, so I have to
use an interface (because it should be const, which I'll add!).

+  IndexOutOfRangeException(var message);
 }