napi: synchronize function call context test

Closes #107

Author: Gabriel Schulhof

src/node_jsvmapi.h

@@ -18,6 +18,7 @@
 #ifndef SRC_NODE_JSVMAPI_H_
 #define SRC_NODE_JSVMAPI_H_
 
+#include <stddef.h>
 #include "node_jsvmapi_types.h"
 
 #ifndef NODE_EXTERN

test/addons-abi/3_callbacks/binding.cc

@@ -21,11 +21,30 @@ void RunCallback(napi_env env, const napi_callback_info info) {
   if (status != napi_ok) return;
 }
 
-void Init(napi_env env, napi_value exports, napi_value module) {
+void RunCallbackWithRecv(napi_env env, const napi_callback_info info) {
   napi_status status;
-  napi_property_descriptor desc = { "exports", RunCallback };
-  status = napi_define_property(env, module, &desc);
+
+  napi_value args[2];
+  status = napi_get_cb_args(env, info, args, 2);
+  if (status != napi_ok) return;
+
+  napi_value cb = args[0];
+  napi_value recv = args[1];
+
+  status = napi_call_function(env, recv, cb, 0, nullptr, nullptr);
   if (status != napi_ok) return;
 }
 
+void Init(napi_env env, napi_value exports, napi_value module) {
+  napi_status status;
+  napi_property_descriptor desc[2] = {
+    { "RunCallback", RunCallback },
+    { "RunCallbackWithRecv", RunCallbackWithRecv }
+  };
+  for (int index = 0; index < 2; index++) {
+    status = napi_define_property(env, exports, &desc[index]);
+    if (status != napi_ok) return;
+  }
+}
+
 NODE_MODULE_ABI(addon, Init)

test/addons-abi/3_callbacks/test.js

@@ -3,6 +3,23 @@ require('../../common');
 var assert = require('assert');
 var addon = require('./build/Release/binding');
 
-addon(function(msg) {
+addon.RunCallback(function(msg) {
   assert.equal(msg, 'hello world');
 });
+
+var global = ( function() { return this; } ).apply();
+
+function testRecv(desiredRecv) {
+  addon.RunCallbackWithRecv(function() {
+    assert.equal(this,
+      ( desiredRecv === undefined || desiredRecv === null ) ? global : desiredRecv );
+  }, desiredRecv);
+}
+
+testRecv(undefined);
+testRecv(null);
+testRecv(5);
+testRecv(true);
+testRecv("Hello");
+testRecv([]);
+testRecv({});