+
+ assertEquals("[object Array Iterator]",
+ Object.prototype.toString.call(iterator));
+ assertEquals("Array Iterator", ArrayIteratorPrototype[Symbol.toStringTag]);
+ var desc = Object.getOwnPropertyDescriptor(
+ ArrayIteratorPrototype, Symbol.toStringTag);
+ assertTrue(desc.configurable);
+ assertFalse(desc.writable);
+ assertEquals("Array Iterator", desc.value);