Add corelib tests

test/codegen/corelib/list_for_each_test.dart

Index: test/codegen/corelib/list_for_each_test.dart
diff --git a/test/codegen/corelib/list_for_each_test.dart b/test/codegen/corelib/list_for_each_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..effe6da8098de3a9ad2f6c898522d740fe6a9c3a
--- /dev/null
+++ b/test/codegen/corelib/list_for_each_test.dart
@@ -0,0 +1,61 @@
+// Copyright (c) 2013, 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";
+import "dart:collection";
+
+class MyList extends ListBase {
+  List list;
+  MyList(this.list);
+  get length => list.length;
+  set length(value) { list.length = value; }
+  operator [](index) => list[index];
+  operator []=(index, val) { list[index] = val; }
+  toString() => list.toString();
+}
+
+void testWithoutModification(List list) {
+  var seen = [];
+  list.forEach(seen.add);
+
+  Expect.listEquals(list, seen);
+}
+
+void testWithModification(List list) {
+  if (list.isEmpty) return;
+  Expect.throws(() => list.forEach((_) => list.add(0)),
+                (e) => e is ConcurrentModificationError);
+}
+
+main() {
+  List fixedLengthList = new List(10);
+  for (int i = 0; i < 10; i++) fixedLengthList[i] = i + 1;
+
+  List growableList = new List();
+  growableList.length = 10;
+  for (int i = 0; i < 10; i++) growableList[i] = i + 1;
+
+  var growableLists = [
+    [],
+    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
+    new MyList([1, 2, 3, 4, 5]),
+    growableList,
+  ];
+  var fixedLengthLists = [
+    const [],
+    fixedLengthList,
+    const [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
+    new MyList(const [1, 2]),
+  ];
+
+  for (var list in growableLists) {
+    print(list);
+    testWithoutModification(list);
+    testWithModification(list);
+  }
+
+  for (var list in fixedLengthLists) {
+    testWithoutModification(list);
+  }
+}