test: function reference call & construct

PR-URL: nodejs/node-addon-api#1005
Reviewed-By: Michael Dawson <midawson@redhat.com>

test/binding.cc

@@ -33,6 +33,7 @@ Object InitDataViewReadWrite(Env env);
 Object InitError(Env env);
 Object InitExternal(Env env);
 Object InitFunction(Env env);
+Object InitFunctionReference(Env env);
 Object InitHandleScope(Env env);
 Object InitMovableCallbacks(Env env);
 Object InitMemoryManagement(Env env);
@@ -105,6 +106,7 @@ Object Init(Env env, Object exports) {
   exports.Set("error", InitError(env));
   exports.Set("external", InitExternal(env));
   exports.Set("function", InitFunction(env));
+  exports.Set("functionreference", InitFunctionReference(env));
   exports.Set("name", InitName(env));
   exports.Set("handlescope", InitHandleScope(env));
   exports.Set("movable_callbacks", InitMovableCallbacks(env));

test/binding.gyp

@@ -24,6 +24,7 @@
         'error.cc',
         'external.cc',
         'function.cc',
+        'functionreference.cc',
         'handlescope.cc',
         'movable_callbacks.cc',
         'memory_management.cc',

test/functionreference.cc

@@ -0,0 +1,30 @@
+#include "napi.h"
+
+using namespace Napi;
+
+namespace {
+Value Call(const CallbackInfo& info) {
+  HandleScope scope(info.Env());
+  FunctionReference ref;
+  ref.Reset(info[0].As<Function>());
+
+  return ref.Call({});
+}
+
+Value Construct(const CallbackInfo& info) {
+  HandleScope scope(info.Env());
+  FunctionReference ref;
+  ref.Reset(info[0].As<Function>());
+
+  return ref.New({});
+}
+}  // namespace
+
+Object InitFunctionReference(Env env) {
+  Object exports = Object::New(env);
+
+  exports["call"] = Function::New(env, Call);
+  exports["construct"] = Function::New(env, Construct);
+
+  return exports;
+}

test/functionreference.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const assert = require('assert');
+
+module.exports = require('./common').runTest(binding => {
+  test(binding.functionreference);
+});
+
+function test(binding) {
+  const e = new Error('foobar');
+  const functionMayThrow = () => { throw e; };
+  const classMayThrow = class { constructor() { throw e; } };
+
+  assert.throws(() => {
+    binding.call(functionMayThrow);
+  }, /foobar/);
+  assert.throws(() => {
+    binding.construct(classMayThrow);
+  }, /foobar/);
+}