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test: improve test coverage for n-api

Add basic tests for handle scopes as code coverage
reports that we are not covering these with the existing

PR-URL: #12327
Reviewed-By: James M Snell <>
Reviewed-By: Colin Ihrig <>
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mhdawson committed Apr 11, 2017
1 parent 75c471a commit 0ec0272e107e26c9740f33baade3cbe10a321fa3
@@ -0,0 +1,8 @@
"targets": [
"target_name": "test_handle_scope",
"sources": [ "test_handle_scope.c" ]
@@ -0,0 +1,10 @@
'use strict';
const common = require('../../common');
const assert = require('assert');

// testing handle scope api calls
const testHandleScope =

assert.ok(testHandleScope.NewScopeEscape() instanceof Object);
@@ -0,0 +1,42 @@
#include <node_api.h>
#include "../common.h"
#include <string.h>

// these tests validate the handle scope functions in the normal
// flow. Forcing gc behaviour to fully validate they are doing
// the right right thing would be quite hard so we keep it
// simple for now.

napi_value NewScope(napi_env env, napi_callback_info info) {
napi_handle_scope scope;
napi_value output = NULL;

NAPI_CALL(env, napi_open_handle_scope(env, &scope));
NAPI_CALL(env, napi_create_object(env, &output));
NAPI_CALL(env, napi_close_handle_scope(env, scope));
return NULL;

napi_value NewScopeEscape(napi_env env, napi_callback_info info) {
napi_escapable_handle_scope scope;
napi_value output = NULL;
napi_value escapee = NULL;

NAPI_CALL(env, napi_open_escapable_handle_scope(env, &scope));
NAPI_CALL(env, napi_create_object(env, &output));
NAPI_CALL(env, napi_escape_handle(env, scope, output, &escapee));
NAPI_CALL(env, napi_close_escapable_handle_scope(env, scope));
return escapee;

void Init(napi_env env, napi_value exports, napi_value module, void* priv) {
napi_property_descriptor properties[] = {
DECLARE_NAPI_PROPERTY("NewScopeEscape", NewScopeEscape),

NAPI_CALL_RETURN_VOID(env, napi_define_properties(
env, exports, sizeof(properties) / sizeof(*properties), properties));

NAPI_MODULE(addon, Init)

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