test: Improve N-API test coverage

- add coverage for napi_get_prototype
- add coverage for napi_strict_equals

PR-URL: #13044
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jason Ginchereau <jasongin@microsoft.com>

test/addons-napi/test_general/binding.gyp

@@ -0,0 +1,8 @@
{
  "targets": [
    {
      "target_name": "test_general",
      "sources": [ "test_general.c" ]
    }
  ]
}

test/addons-napi/test_general/test.js

@@ -0,0 +1,32 @@
'use strict';

const common = require('../../common');
const test_general = require(`./build/${common.buildType}/test_general`);
const assert = require('assert');

const val1 = '1';
const val2 = 1;
const val3 = 1;

class BaseClass {
}

class ExtendedClass extends BaseClass {
}

const baseObject = new BaseClass();
const extendedObject = new ExtendedClass();

// test napi_strict_equals
assert.ok(test_general.testStrictEquals(val1, val1));
assert.strictEqual(test_general.testStrictEquals(val1, val2), false);
assert.ok(test_general.testStrictEquals(val2, val3));

// test napi_get_prototype
assert.strictEqual(test_general.testGetPrototype(baseObject),
                   Object.getPrototypeOf(baseObject));
assert.strictEqual(test_general.testGetPrototype(extendedObject),
                   Object.getPrototypeOf(extendedObject));
assert.ok(test_general.testGetPrototype(baseObject) !==
          test_general.testGetPrototype(extendedObject),
          'Prototypes for base and extended should be different');

test/addons-napi/test_general/test_general.c

@@ -0,0 +1,38 @@
#include <node_api.h>
#include "../common.h"

napi_value testStrictEquals(napi_env env, napi_callback_info info) {
  size_t argc = 2;
  napi_value args[2];
  NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));

  bool bool_result;
  napi_value result;
  NAPI_CALL(env, napi_strict_equals(env, args[0], args[1], &bool_result));
  NAPI_CALL(env, napi_get_boolean(env, bool_result, &result));

  return result;
}

napi_value testGetPrototype(napi_env env, napi_callback_info info) {
  size_t argc = 1;
  napi_value args[1];
  NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));

  napi_value result;
  NAPI_CALL(env, napi_get_prototype(env, args[0], &result));

  return result;
}

void Init(napi_env env, napi_value exports, napi_value module, void* priv) {
  napi_property_descriptor descriptors[] = {
    DECLARE_NAPI_PROPERTY("testStrictEquals", testStrictEquals),
    DECLARE_NAPI_PROPERTY("testGetPrototype", testGetPrototype),
  };

  NAPI_CALL_RETURN_VOID(env, napi_define_properties(
    env, exports, sizeof(descriptors) / sizeof(*descriptors), descriptors));
}

NAPI_MODULE(addon, Init)