Fix broken test

tests/standalone/io/file_test.dart

Index: tests/standalone/io/file_test.dart
diff --git a/tests/standalone/io/file_test.dart b/tests/standalone/io/file_test.dart
index e3b314560436aca454d695c27304e9c4a29ec51b..d445debcf775ff9efd3a96ccca76eb8b82af23ad 100644
--- a/tests/standalone/io/file_test.dart
+++ b/tests/standalone/io/file_test.dart
@@ -11,11 +11,13 @@ import 'dart:io';
 import 'dart:isolate';
 
 class MyListOfOneElement
-    extends Object with ListMixin<int>, UnmodifiableListMixin {
+    extends Object with ListMixin<int> implements List<int> {
   int _value;
   MyListOfOneElement(this._value);
   int get length => 1;
   operator [](int index) => _value;

[kustermann, 2013/04/24 13:09:49]

I'd throw if 'index != 0' in 'operator[]'.

[Søren Gjesse, 2013/04/24 13:11:53]

Good point, done.

+  void set length(int index) { throw "Unsupported"; }
+  operator []=(int index, value) { throw "Unsupported"; }
 }
 
 class FileTest {