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n-api: make napi_get_property_names return strings

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The documentation says that this method returns an array of strings.
Currently, it does not do so for indices. Resolve that by telling
V8 explicitly to convert to string.

PR-URL: https://github.com/nodejs/node/pull/27524
Fixes: https://github.com/nodejs/node/issues/27496
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
This commit is contained in:
Anna Henningsen 2019-05-01 23:40:02 +02:00 committed by Daniel Bevenius
parent d7d6526260
commit 5c08481aa7
3 changed files with 51 additions and 1 deletions
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9
src/js_native_api_v8.cc
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@ -870,7 +870,14 @@ napi_status napi_get_property_names(napi_env env,
v8::Local<v8::Object> obj;
CHECK_TO_OBJECT(env, context, obj, object);
auto maybe_propertynames = obj->GetPropertyNames(context);
v8::MaybeLocal<v8::Array> maybe_propertynames = obj->GetPropertyNames(
context,
v8::KeyCollectionMode::kIncludePrototypes,
static_cast<v8::PropertyFilter>(
v8::PropertyFilter::ONLY_ENUMERABLE |
v8::PropertyFilter::SKIP_SYMBOLS),
v8::IndexFilter::kIncludeIndices,
v8::KeyConversionMode::kConvertToString);
CHECK_MAYBE_EMPTY(env, maybe_propertynames, napi_generic_failure);

23
test/js-native-api/test_object/test.js
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@ -202,3 +202,26 @@ assert.strictEqual(newObject.test_string, 'test string');
assert.strictEqual(test_object.Delete(obj, 'foo'), true);
assert.strictEqual(obj.foo, 'baz');
}
{
// Verify that napi_get_property_names gets the right set of property names,
// i.e.: includes prototypes, only enumerable properties, skips symbols,
// and includes indices and converts them to strings.
const object = Object.create({
inherited: 1
});
object.normal = 2;
object[Symbol('foo')] = 3;
Object.defineProperty(object, 'unenumerable', {
value: 4,
enumerable: false,
writable: true,
configurable: true
});
object[5] = 5;
assert.deepStrictEqual(test_object.GetPropertyNames(object),
['5', 'normal', 'inherited']);
}

20
test/js-native-api/test_object/test_object.c
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@ -63,6 +63,25 @@ static napi_value GetNamed(napi_env env, napi_callback_info info) {
return output;
}
static napi_value GetPropertyNames(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_ASSERT(env, argc >= 1, "Wrong number of arguments");
napi_valuetype value_type0;
NAPI_CALL(env, napi_typeof(env, args[0], &value_type0));
NAPI_ASSERT(env, value_type0 == napi_object,
"Wrong type of arguments. Expects an object as first argument.");
napi_value output;
NAPI_CALL(env, napi_get_property_names(env, args[0], &output));
return output;
}
static napi_value Set(napi_env env, napi_callback_info info) {
size_t argc = 3;
napi_value args[3];
@ -325,6 +344,7 @@ napi_value Init(napi_env env, napi_value exports) {
napi_property_descriptor descriptors[] = {
DECLARE_NAPI_PROPERTY("Get", Get),
DECLARE_NAPI_PROPERTY("GetNamed", GetNamed),
DECLARE_NAPI_PROPERTY("GetPropertyNames", GetPropertyNames),
DECLARE_NAPI_PROPERTY("Set", Set),
DECLARE_NAPI_PROPERTY("SetNamed", SetNamed),
DECLARE_NAPI_PROPERTY("Has", Has),