add test

Author: Gabriel Schulhof

test/js-native-api/test_reference_double_free/binding.gyp

@@ -0,0 +1,11 @@
+{
+  "targets": [
+    {
+      "target_name": "test_reference_double_free",
+      "sources": [
+        "../entry_point.c",
+        "test_reference_double_free.c"
+      ]
+    }
+  ]
+}

test/js-native-api/test_reference_double_free/test.js

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+'use strict';
+
+// This test makes no assertions. It tests a fix without which it will crash
+// with a double free.
+
+const { buildType } = require('../../common');
+
+const addon = require(`./build/${buildType}/test_reference_double_free`);
+
+{ const obj = new addon.MyObject(); }

test/js-native-api/test_reference_double_free/test_reference_double_free.c

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+#include <stdlib.h>
+#include <js_native_api.h>
+#include "../common.h"
+
+static void Destructor(napi_env env, void* data, void* nothing) {
+  napi_ref* ref = data;
+  NODE_API_CALL_RETURN_VOID(env, napi_delete_reference(env, *ref));
+  free(ref);
+}
+
+static napi_value New(napi_env env, napi_callback_info info) {
+  size_t argc = 0;
+  napi_value js_this;
+  napi_ref* ref = malloc(sizeof(*ref));
+
+  NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, NULL, &js_this, NULL));
+  NODE_API_CALL(env, napi_wrap(env, js_this, ref, Destructor, NULL, ref)); 
+  NODE_API_CALL(env, napi_reference_ref(env, *ref, NULL));
+
+  return js_this;
+}
+
+EXTERN_C_START
+napi_value Init(napi_env env, napi_value exports) {
+  napi_value myobj_ctor;
+  NODE_API_CALL(env,
+      napi_define_class(
+          env, "MyObject", NAPI_AUTO_LENGTH, New, NULL, 0, NULL, &myobj_ctor));
+  NODE_API_CALL(env,
+      napi_set_named_property(env, exports, "MyObject", myobj_ctor));
+  return exports;
+}
+EXTERN_C_END