Add corelib tests

test/codegen/corelib/has_next_iterator_test.dart

Index: test/codegen/corelib/has_next_iterator_test.dart
diff --git a/test/codegen/corelib/has_next_iterator_test.dart b/test/codegen/corelib/has_next_iterator_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..bd8a0f360ca20843cad0add89731e4057e945e92
--- /dev/null
+++ b/test/codegen/corelib/has_next_iterator_test.dart
@@ -0,0 +1,36 @@
+// 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.
+
+library hasNextIterator.test;
+import "package:expect/expect.dart";
+import 'dart:collection';
+
+main() {
+  var it = new HasNextIterator([].iterator);
+  Expect.isFalse(it.hasNext);
+  Expect.isFalse(it.hasNext);
+  Expect.throws(() => it.next(), (e) => e is StateError);
+  Expect.isFalse(it.hasNext);
+
+  it = new HasNextIterator([1].iterator);
+  Expect.isTrue(it.hasNext);
+  Expect.isTrue(it.hasNext);
+  Expect.equals(1, it.next());
+  Expect.isFalse(it.hasNext);
+  Expect.isFalse(it.hasNext);
+  Expect.throws(() => it.next(), (e) => e is StateError);
+  Expect.isFalse(it.hasNext);
+
+  it = new HasNextIterator([1, 2].iterator);
+  Expect.isTrue(it.hasNext);
+  Expect.isTrue(it.hasNext);
+  Expect.equals(1, it.next());
+  Expect.isTrue(it.hasNext);
+  Expect.isTrue(it.hasNext);
+  Expect.equals(2, it.next());
+  Expect.isFalse(it.hasNext);
+  Expect.isFalse(it.hasNext);
+  Expect.throws(() => it.next(), (e) => e is StateError);
+  Expect.isFalse(it.hasNext);
+}