Get information about original function from bound function

test/cctest/test-api.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 17818 matching lines @@
   script->Run();
   v8::Local<v8::Function> foo = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::NewFromUtf8(env->GetIsolate(), "foo")));
   v8::Local<v8::Function> bar = v8::Local<v8::Function>::Cast(
       env->Global()->Get(v8::String::NewFromUtf8(env->GetIsolate(), "bar")));
   CHECK_EQ(script->GetId(), foo->ScriptId());
   CHECK_EQ(script->GetId(), bar->ScriptId());
 }
 
 
+THREADED_TEST(FunctionGetBoundFunction) {
+  LocalContext env;
+  v8::HandleScope scope(env->GetIsolate());
+  v8::ScriptOrigin origin = v8::ScriptOrigin(v8::String::NewFromUtf8(
+      env->GetIsolate(), "test"));
+  v8::Handle<v8::String> script = v8::String::NewFromUtf8(
+      env->GetIsolate(),
+      "function f () {}\n"
+      "var g = f.bind();\n");
+  v8::Script::Compile(script, &origin)->Run();
+  v8::Local<v8::Function> f = v8::Local<v8::Function>::Cast(
+      env->Global()->Get(v8::String::NewFromUtf8(env->GetIsolate(), "f")));
+  v8::Local<v8::Function> g = v8::Local<v8::Function>::Cast(
+      env->Global()->Get(v8::String::NewFromUtf8(env->GetIsolate(), "g")));
+  CHECK(!g->GetBoundFunction()->IsUndefined());

[yurys, 2013/12/12 20:20:50]

CHECK(g->GetBoundFunction()->IsFunction())

[Alexandra Mikhaylova, 2013/12/18 10:00:28]

Done.

+  CHECK_EQ(*v8::String::Utf8Value(f->GetName()),

[yurys, 2013/12/12 20:20:50]

CHECK_EQ should work well for Handles, you don't need to to cast them to
Utf8Value

[Alexandra Mikhaylova, 2013/12/18 10:00:28]

Done.

+           *v8::String::Utf8Value(
+      Local<v8::Function>::Cast(g->GetBoundFunction())->GetName()));

[yurys, 2013/12/12 20:20:50]

It may make sense to extract Local<v8::Function>::Cast(g->GetBoundFunction())
into a separate statement to avoid duplication.

[Alexandra Mikhaylova, 2013/12/18 10:00:28]

Done.

+  CHECK_EQ(f->GetScriptLineNumber(),
+           Local<v8::Function>::Cast(
+      g->GetBoundFunction())->GetScriptLineNumber());
+  CHECK_EQ(f->GetScriptColumnNumber(),
+           Local<v8::Function>::Cast(
+      g->GetBoundFunction())->GetScriptColumnNumber());
+}
+
+
 static void GetterWhichReturns42(
     Local<String> name,
     const v8::PropertyCallbackInfo<v8::Value>& info) {
   CHECK(v8::Utils::OpenHandle(*info.This())->IsJSObject());
   CHECK(v8::Utils::OpenHandle(*info.Holder())->IsJSObject());
   info.GetReturnValue().Set(v8_num(42));
 }
 
 
 static void SetterWhichSetsYOnThisTo23(
@@ skipping 3101 matching lines @@
   }
   for (int i = 0; i < runs; i++) {
     Local<String> expected;
     if (i != 0) {
       CHECK_EQ(v8_str("escape value"), values[i]);
     } else {
       CHECK(values[i].IsEmpty());
     }
   }
 }