test: add test for own properties on ObjectWrap

PR-URL: nodejs/node-addon-api#645
Reviewed-By: Gabriel Schulhof <[email protected]>
Reviewed-By: Chengzhong Wu <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>

Author: kevindavies8

test/objectwrap.cc

@@ -28,7 +28,22 @@ class Test : public Napi::ObjectWrap<Test> {
     if(info.Length() > 0) {
       finalizeCb_ = Napi::Persistent(info[0].As<Napi::Function>());
     }
+    // Create an own instance property.
+    info.This().As<Napi::Object>().DefineProperty(
+        Napi::PropertyDescriptor::Accessor(info.Env(),
+                                           info.This().As<Napi::Object>(),
+                                           "ownProperty",
+                                           OwnPropertyGetter,
+                                           napi_enumerable, this));
+
+    // Create an own instance property with a templated function.
+    info.This().As<Napi::Object>().DefineProperty(
+        Napi::PropertyDescriptor::Accessor<OwnPropertyGetter>("ownPropertyT",
+                                                              napi_enumerable, this));
+  }
 
+  static Napi::Value OwnPropertyGetter(const Napi::CallbackInfo& info) {
+    return static_cast<Test*>(info.Data())->Getter(info);
   }
 
   void Setter(const Napi::CallbackInfo& /*info*/, const Napi::Value& value) {

test/objectwrap.js

@@ -72,6 +72,18 @@ const test = (binding) => {
       obj[clazz.kTestAccessorTInternal] = 'instance internal getset 4';
       assert.strictEqual(obj[clazz.kTestAccessorTInternal], 'instance internal getset 4');
     }
+
+    // own property
+    {
+      obj.testSetter = 'own property value';
+      // Make sure the properties are enumerable.
+      assert(Object.getOwnPropertyNames(obj).indexOf('ownProperty') >= 0);
+      assert(Object.getOwnPropertyNames(obj).indexOf('ownPropertyT') >= 0);
+
+      // Make sure the properties return the right value.
+      assert.strictEqual(obj.ownProperty, 'own property value');
+      assert.strictEqual(obj.ownPropertyT, 'own property value');
+    }
   };
 
   const testMethod = (obj, clazz) => {
@@ -84,10 +96,12 @@ const test = (binding) => {
   };
 
   const testEnumerables = (obj, clazz) => {
-    // Object.keys: only object
-    assert.deepEqual(Object.keys(obj), []);
+    // Object.keys: only object without prototype
+    assert(Object.keys(obj).length === 2);
+    assert(Object.keys(obj).includes('ownProperty'));
+    assert(Object.keys(obj).indexOf('ownPropertyT') >= 0);
 
-    // for..in: object + prototype
+    // for..in: object and prototype
     {
       const keys = [];
       for (let key in obj) {