Object.observe: generate change records for indexed properties.

test/mjsunit/harmony/object-observe.js

Index: test/mjsunit/harmony/object-observe.js
diff --git a/test/mjsunit/harmony/object-observe.js b/test/mjsunit/harmony/object-observe.js
index ba855868c78bbbd60f3128f7e38df54d89caaa18..6a0fc0dfea131f367345a1ac15ec858243377431 100644
--- a/test/mjsunit/harmony/object-observe.js
+++ b/test/mjsunit/harmony/object-observe.js
@@ -282,3 +282,44 @@ observer.assertCallbackRecords([
   { object: obj, name: "a", type: "reconfigured" },
   { object: obj, name: "a", type: "updated", oldValue: 9 },
 ]);
+
+// Observing indexed properties.
+reset();
+var obj = {'1': 1}
+Object.observe(obj, observer.callback);
+obj[1] = 2;
+obj[1] = 3;
+delete obj[1];
+obj[1] = 4;
+obj[1] = 4;  // ignored
+obj[1] = 5;
+Object.defineProperty(obj, "1", {value: 6});
+Object.defineProperty(obj, "1", {writable: false});
+obj[1] = 7;  // ignored
+Object.defineProperty(obj, "1", {value: 8});
+Object.defineProperty(obj, "1", {value: 7, writable: true});
+Object.defineProperty(obj, "1", {get: function() {}});
+delete obj[1];
+delete obj[1];
+Object.defineProperty(obj, "1", {get: function() {}, configurable: true});
+Object.defineProperty(obj, "1", {value: 9, writable: true});
+obj[1] = 10;
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, name: "1", type: "updated", oldValue: 1 },
+  { object: obj, name: "1", type: "updated", oldValue: 2 },
+  { object: obj, name: "1", type: "deleted", oldValue: 3 },
+  { object: obj, name: "1", type: "new" },
+  { object: obj, name: "1", type: "updated", oldValue: 4 },
+  { object: obj, name: "1", type: "updated", oldValue: 5 },
+  { object: obj, name: "1", type: "reconfigured", oldValue: 6 },
+  { object: obj, name: "1", type: "updated", oldValue: 6 },
+  { object: obj, name: "1", type: "reconfigured", oldValue: 8 },
+  { object: obj, name: "1", type: "reconfigured", oldValue: 7 },
+  // TODO(observe): oldValue should not be present below.
+  { object: obj, name: "1", type: "deleted", oldValue: undefined },
+  { object: obj, name: "1", type: "new" },
+  // TODO(observe): oldValue should be absent below, and type = "reconfigured".
+  { object: obj, name: "1", type: "updated", oldValue: undefined },
+  { object: obj, name: "1", type: "updated", oldValue: 9 },
+]);