Object.observe: test mutating an object via the API

test/cctest/test-object-observe.cc

 // Copyright 2012 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 260 matching lines @@
     LocalContext context3(NULL, Handle<ObjectTemplate>(), global_proxy);
     CompileRun(
         "var records3 = [];"
         "Object.observe(this, function(r) { [].push.apply(records3, r) });"
         "this.qux = 'context3';");
     CHECK_EQ(1, CompileRun("records3.length")->Int32Value());
     CHECK(global_proxy->StrictEquals(CompileRun("records3[0].object")));
   }
   CHECK_EQ(3, CompileRun("records.length")->Int32Value());
 }
+
+TEST(APITestBasicMutation) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  LocalContext context;
+  Handle<Object> obj = Handle<Object>::Cast(CompileRun(
+      "var records = [];"
+      "var obj = {};"
+      "function observer(r) { [].push.apply(records, r); };"
+      "Object.observe(obj, observer);"
+      "obj"));
+  obj->Set(String::New("foo"), Number::New(1));
+  obj->Set(1, Number::New(2));
+  // ForceSet should work just as well as Set
+  obj->ForceSet(String::New("foo"), Number::New(3));
+  obj->ForceSet(Number::New(1), Number::New(4));
+  // Setting an indexed element via the property setting method
+  obj->Set(Number::New(1), Number::New(5));
+  // Setting with a non-String, non-uint32 key
+  obj->Set(Number::New(1.1), Number::New(6), DontDelete);
+  obj->Delete(String::New("foo"));
+  obj->Delete(1);
+  obj->ForceDelete(Number::New(1.1));
+
+  // Force delivery
+  // TODO(adamk): Should the above set methods trigger delivery themselves?
+  CompileRun("void 0");
+  CHECK_EQ(9, CompileRun("records.length")->Int32Value());
+  ExpectString("records[0].type", "new");

[rossberg, 2012/12/18 13:35:58]

Can you check object and oldValue as well? Perhaps via a helper function?

[adamk, 2012/12/18 17:26:10]

Added a helper. Will do a cleanup in a future change to make more use of it/make
it better, but it suffices for this test.

+  ExpectString("records[0].name", "foo");
+  ExpectString("records[1].type", "new");
+  ExpectString("records[1].name", "1");
+  ExpectString("records[2].type", "updated");
+  ExpectString("records[2].name", "foo");
+  ExpectString("records[3].type", "updated");
+  ExpectString("records[3].name", "1");
+  ExpectString("records[4].type", "updated");
+  ExpectString("records[4].name", "1");
+  ExpectString("records[5].type", "new");
+  ExpectString("records[5].name", "1.1");
+  ExpectString("records[6].type", "deleted");
+  ExpectString("records[6].name", "foo");
+  ExpectString("records[7].type", "deleted");
+  ExpectString("records[7].name", "1");
+  ExpectString("records[8].type", "deleted");
+  ExpectString("records[8].name", "1.1");
+}