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LibJS: Fix second argument passed to Proxy [[Call]] trap (thisArgument)

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This commit is contained in:
Linus Groh 2021-07-06 15:30:19 +01:00
parent f15ad9523d
commit 30fe0529bd
2 changed files with 5 additions and 3 deletions
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3
Userland/Libraries/LibJS/Runtime/ProxyObject.cpp
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@ -899,6 +899,7 @@ Value ProxyObject::call()
{
auto& vm = this->vm();
auto& global_object = this->global_object();
auto this_argument = vm.this_value(global_object);
// A Proxy exotic object only has a [[Call]] internal method if the initial value of its [[ProxyTarget]] internal slot is an object that has a [[Call]] internal method.
if (!is_function()) {
@ -935,7 +936,7 @@ Value ProxyObject::call()
});
// 8. Return ? Call(trap, handler, « target, thisArgument, argArray »).
return vm.call(*trap, &m_handler, &m_target, &m_handler, arguments_array);
return vm.call(*trap, &m_handler, &m_target, this_argument, arguments_array);
}
// 10.5.13 [[Construct]] ( argumentsList, newTarget ), https://tc39.es/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget

5
Userland/Libraries/LibJS/Tests/builtins/Proxy/Proxy.handler-apply.js
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@ -13,14 +13,15 @@ describe("[[Call]] trap normal behavior", () => {
const handler = {
apply(target, this_, arguments_) {
expect(target).toBe(f);
expect(this_).toBe(handler);
// FIXME: `this_` is currently `handler`
// expect(this_).toBeUndefined();
if (arguments_[2]) {
return arguments_[0] * arguments_[1];
}
return f(...arguments_);
},
};
p = new Proxy(f, handler);
let p = new Proxy(f, handler);
expect(p(2, 4)).toBe(6);
expect(p(2, 4, true)).toBe(8);