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LibJS: Implement Object.isFrozen() and Object.isSealed()

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Linus Groh 2021-04-06 22:45:12 +02:00 • committed by Andreas Kling
parent 9af07c7803
commit f3264b0dbd
7 changed files with 105 additions and 0 deletions
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26
Userland/Libraries/LibJS/Runtime/Object.cpp
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@ -208,6 +208,32 @@ bool Object::set_integrity_level(IntegrityLevel level)
return true;
}
// 7.3.16 TestIntegrityLevel, https://tc39.es/ecma262/#sec-testintegritylevel
bool Object::test_integrity_level(IntegrityLevel level)
{
auto& vm = this->vm();
auto extensible = is_extensible();
if (vm.exception())
return false;
if (extensible)
return false;
auto keys = get_own_properties(PropertyKind::Key);
if (vm.exception())
return false;
for (auto& key : keys) {
auto property_name = PropertyName::from_value(global_object(), key);
auto property_descriptor = get_own_property_descriptor(property_name);
VERIFY(property_descriptor.has_value());
if (property_descriptor->attributes.is_configurable())
return false;
if (level == IntegrityLevel::Frozen && property_descriptor->is_data_descriptor()) {
if (property_descriptor->attributes.is_writable())
return false;
}
}
return true;
}
Value Object::get_own_property(const PropertyName& property_name, Value receiver) const
{
VERIFY(property_name.is_valid());