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LibJS: Put exports before symbols in keys of module namespace object

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davidot 2022-08-31 20:31:02 +02:00 committed by Linus Groh
parent fb61e9274a
commit 3b56043612
Notes: sideshowbarker 2024-07-18 03:20:18 +09:00 
Author: https://github.com/davidot
Commit: https://github.com/SerenityOS/serenity/commit/3b56043612
Pull-request: https://github.com/SerenityOS/serenity/pull/15100
Reviewed-by: https://github.com/linusg
3 changed files with 27 additions and 4 deletions
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11
Userland/Libraries/LibJS/Runtime/ModuleNamespaceObject.cpp
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@ -210,16 +210,19 @@ ThrowCompletionOr<bool> ModuleNamespaceObject::internal_delete(PropertyKey const
ThrowCompletionOr<MarkedVector<Value>> ModuleNamespaceObject::internal_own_property_keys() const
{
// 1. Let exports be O.[[Exports]].
// NOTE: We only add the exports after we know the size of symbolKeys
MarkedVector<Value> exports { vm().heap() };
// 2. Let symbolKeys be OrdinaryOwnPropertyKeys(O).
auto symbol_keys = MUST(Object::internal_own_property_keys());
// 3. Return the list-concatenation of exports and symbolKeys.
for (auto& export_name : m_exports) {
symbol_keys.append(js_string(vm(), export_name));
}
exports.ensure_capacity(m_exports.size() + symbol_keys.size());
for (auto const& export_name : m_exports)
exports.unchecked_append(js_string(vm(), export_name));
exports.extend(symbol_keys);
return symbol_keys;
return exports;
}
}

4
Userland/Libraries/LibJS/Tests/modules/basic-modules.js
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@ -182,6 +182,10 @@ describe("in- and exports", () => {
test("can import with (useless) assertions", () => {
expectModulePassed("./import-with-assertions.mjs");
});
test("namespace has expected ordering", () => {
expectModulePassed("./namespace-order.mjs");
});
});
describe("loops", () => {

16
Userland/Libraries/LibJS/Tests/modules/namespace-order.mjs Normal file
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@ -0,0 +1,16 @@
import * as ns from "./default-and-star-export.mjs";
const keys = Reflect.ownKeys(ns);
// The keys should be in alphabetical order and @@toString at the end
if (keys.length < 4) throw new Error("Expected at least 3 keys and @@toStringTag");
if (keys[0] !== "") throw new Error('Expected keys[0] === ""');
if (keys[1] !== "*") throw new Error('Expected keys[1] === "*"');
if (keys[2] !== "default") throw new Error('Expected keys[2] === "default"');
if (keys.indexOf(Symbol.toStringTag) <= 2)
throw new Error("Expected Symbol.toStringTag to be behind string keys");
export const passed = true;