Generators return boxed values

test/mjsunit/harmony/generators-iteration.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --harmony-generators --expose-gc
 
 // Test generator iteration.
 
 var GeneratorFunction = (function*(){yield 1;}).__proto__.constructor;
 
+function TestGeneratorResultPrototype() {
+  function* g() { yield 1; }
+  var iter = g();
+  var result = iter.next();
+
+  assertSame(Object.prototype, Object.getPrototypeOf(result));
+  property_names = Object.getOwnPropertyNames(result);
+  property_names.sort();
+  assertEquals(["done", "value"], property_names);
+  assertEquals({ value: 1, done: false }, result);
+}
+TestGeneratorResultPrototype()
+
 function TestGenerator(g, expected_values_for_next,
                        send_val, expected_values_for_send) {
   function testNext(thunk) {
     var iter = thunk();
     for (var i = 0; i < expected_values_for_next.length; i++) {
-      assertEquals(expected_values_for_next[i], iter.next());
+      assertEquals({ value: expected_values_for_next[i],
+                     done: i == expected_values_for_next.length - 1 },
+                   iter.next());
     }
     assertThrows(function() { iter.next(); }, Error);
   }
   function testSend(thunk) {
     var iter = thunk();
     for (var i = 0; i < expected_values_for_send.length; i++) {
-      assertEquals(expected_values_for_send[i], iter.send(send_val));
+      assertEquals({ value: expected_values_for_send[i],
+                     done: i == expected_values_for_send.length - 1 },
+                   iter.send(send_val));
     }
     assertThrows(function() { iter.send(send_val); }, Error);
   }
   function testThrow(thunk) {
     for (var i = 0; i < expected_values_for_next.length; i++) {
       var iter = thunk();
       for (var j = 0; j < i; j++) {
-        assertEquals(expected_values_for_next[j], iter.next());
+        assertEquals({ value: expected_values_for_next[j],
+                       done: j == expected_values_for_next.length - 1 },
+                     iter.next());
       }
       function Sentinel() {}
       assertThrows(function () { iter.throw(new Sentinel); }, Sentinel);
       assertThrows(function () { iter.next(); }, Error);
     }
   }
 
   testNext(g);
   testSend(g);
   testThrow(g);
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   function TestThrowRecursion() {
     function* g() { yield iter.throw(1); }
     var iter = g();
     return iter.next();
   }
   assertThrows(TestNextRecursion, Error);
   assertThrows(TestSendRecursion, Error);
   assertThrows(TestThrowRecursion, Error);
 }
 TestRecursion();