diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_6/Generators/objects.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_6/Generators/objects.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+// This file was written by Andy Wingo <wingo@igalia.com> and originally
+// contributed to V8 as generators-objects.js, available here:
+//
+// http://code.google.com/p/v8/source/browse/branches/bleeding_edge/test/mjsunit/harmony/generators-objects.js
+
+// Test aspects of the generator runtime.
+
+// Test the properties and prototype of a generator object.
+function TestGeneratorObject() {
+  function* g() { yield 1; }
+
+  var iter = g();
+  assertEq(Object.getPrototypeOf(iter), g.prototype);
+  assertTrue(iter instanceof g);
+  assertEq(String(iter), "[object Generator]");
+  assertDeepEq(Object.getOwnPropertyNames(iter), []);
+  assertNotEq(g(), iter);
+
+  // g() is the same as new g().
+  iter = new g();
+  assertEq(Object.getPrototypeOf(iter), g.prototype);
+  assertTrue(iter instanceof g);
+  assertEq(String(iter), "[object Generator]");
+  assertDeepEq(Object.getOwnPropertyNames(iter), []);
+  assertNotEq(new g(), iter);
+}
+TestGeneratorObject();
+
+
+// Test the methods of generator objects.
+function TestGeneratorObjectMethods() {
+  function* g() { yield 1; }
+  var iter = g();
+
+  function TestNonGenerator(non_generator) {
+    assertThrowsInstanceOf(function() { iter.next.call(non_generator); }, TypeError);
+    assertThrowsInstanceOf(function() { iter.next.call(non_generator, 1); }, TypeError);
+    assertThrowsInstanceOf(function() { iter.throw.call(non_generator, 1); }, TypeError);
+    assertThrowsInstanceOf(function() { iter.close.call(non_generator); }, TypeError);
+  }
+
+  TestNonGenerator(1);
+  TestNonGenerator({});
+  TestNonGenerator(function(){});
+  TestNonGenerator(g);
+  TestNonGenerator(g.prototype);
+}
+TestGeneratorObjectMethods();
+
+
+if (typeof reportCompare == "function")
+    reportCompare(true, true);