1 files changed, 22 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/es6/map-iterator-4.js b/deps/v8/test/mjsunit/es6/map-iterator-4.js
new file mode 100644
index 0000000000..a43282a69c
--- /dev/null
+++ b/deps/v8/test/mjsunit/es6/map-iterator-4.js
@@ -0,0 +1,22 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --no-stress-opt
+
+var map = new Map([[1,2], [2,3], [3,4]]);
+assertTrue(%MapIteratorProtector());
+assertTrue(%SetIteratorProtector());
+
+// This changes %MapIteratorPrototype%. No more tests should be run after this
+// in the same instance.
+var iterator = map.keys();
+iterator.__proto__.next = () => ({done: true});
+
+assertFalse(%MapIteratorProtector());
+assertTrue(%SetIteratorProtector());
+assertEquals([], [...map]);
+assertEquals([], [...map.entries()]);
+assertEquals([], [...map.keys()]);
+assertEquals([], [...map.values()]);
+assertEquals([], [...iterator]);