n-api,test: add a new.target test to addons-napi

Added a N-API test to verify new.target behavior. PR-URL: #19236 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michael Dawson <[email protected]>

Author: boingoing

test/addons-napi/test_new_target/binding.c

@@ -0,0 +1,69 @@
+#include<node_api.h>
+#include"../common.h"
+
+napi_valueBaseClass(napi_envenv, napi_callback_infoinfo){
+napi_valuenewTargetArg;
+NAPI_CALL(env, napi_get_new_target(env, info, &newTargetArg));
+napi_valuethisArg;
+NAPI_CALL(env, napi_get_cb_info(env, info, NULL, NULL, &thisArg, NULL));
+napi_valueundefined;
+NAPI_CALL(env, napi_get_undefined(env, &undefined));
+
+// this !== new.target since we are being invoked through super()
+boolresult;
+NAPI_CALL(env, napi_strict_equals(env, newTargetArg, thisArg, &result));
+NAPI_ASSERT(env, !result, "this !== new.target");
+
+// new.target !== undefined because we should be called as a new expression
+NAPI_ASSERT(env, newTargetArg!=NULL, "newTargetArg != NULL");
+NAPI_CALL(env, napi_strict_equals(env, newTargetArg, undefined, &result));
+NAPI_ASSERT(env, !result, "new.target !== undefined");
+
+returnthisArg;
+}
+
+napi_valueConstructor(napi_envenv, napi_callback_infoinfo){
+boolresult;
+napi_valuenewTargetArg;
+NAPI_CALL(env, napi_get_new_target(env, info, &newTargetArg));
+size_targc=1;
+napi_valueargv;
+napi_valuethisArg;
+NAPI_CALL(env, napi_get_cb_info(env, info, &argc, &argv, &thisArg, NULL));
+napi_valueundefined;
+NAPI_CALL(env, napi_get_undefined(env, &undefined));
+
+// new.target !== undefined because we should be called as a new expression
+NAPI_ASSERT(env, newTargetArg!=NULL, "newTargetArg != NULL");
+NAPI_CALL(env, napi_strict_equals(env, newTargetArg, undefined, &result));
+NAPI_ASSERT(env, !result, "new.target !== undefined");
+
+// arguments[0] should be Constructor itself (test harness passed it)
+NAPI_CALL(env, napi_strict_equals(env, newTargetArg, argv, &result));
+NAPI_ASSERT(env, result, "new.target === Constructor");
+
+returnthisArg;
+}
+
+napi_valueOrdinaryFunction(napi_envenv, napi_callback_infoinfo){
+napi_valuenewTargetArg;
+NAPI_CALL(env, napi_get_new_target(env, info, &newTargetArg));
+
+NAPI_ASSERT(env, newTargetArg==NULL, "newTargetArg == NULL");
+
+napi_value_true;
+NAPI_CALL(env, napi_get_boolean(env, true, &_true));
+return_true;
+}
+
+napi_valueInit(napi_envenv, napi_valueexports){
+constnapi_property_descriptordesc[] ={
+DECLARE_NAPI_PROPERTY("BaseClass", BaseClass),
+DECLARE_NAPI_PROPERTY("OrdinaryFunction", OrdinaryFunction),
+DECLARE_NAPI_PROPERTY("Constructor", Constructor)
+ };
+NAPI_CALL(env, napi_define_properties(env, exports, 3, desc));
+returnexports;
+}
+
+NAPI_MODULE(NODE_GYP_MODULE_NAME, Init)

test/addons-napi/test_new_target/binding.gyp

@@ -0,0 +1,9 @@
+{
+'targets': [
+{
+'target_name': 'binding',
+'defines': [ 'V8_DEPRECATION_WARNINGS=1' ],
+'sources': [ 'binding.c' ]
+ }
+ ]
+}

test/addons-napi/test_new_target/test.js

@@ -0,0 +1,21 @@
+'use strict';
+
+constcommon=require('../../common');
+constassert=require('assert');
+constbinding=require(`./build/${common.buildType}/binding`);
+
+classClassextendsbinding.BaseClass{
+constructor(){
+super();
+this.method();
+}
+method(){
+this.ok=true;
+}
+}
+
+assert.ok(newClass()instanceofbinding.BaseClass);
+assert.ok(newClass().ok);
+assert.ok(binding.OrdinaryFunction());
+assert.ok(
+newbinding.Constructor(binding.Constructor)instanceofbinding.Constructor);