mirror of
https://github.com/RGBCube/serenity
synced 2025-07-23 04:17:34 +00:00
LibJS: Implement Object.create()
This commit is contained in:
parent
da8a35a79e
commit
9cd010167a
4 changed files with 87 additions and 0 deletions
|
@ -94,6 +94,7 @@ namespace JS {
|
||||||
P(cosh) \
|
P(cosh) \
|
||||||
P(count) \
|
P(count) \
|
||||||
P(countReset) \
|
P(countReset) \
|
||||||
|
P(create) \
|
||||||
P(debug) \
|
P(debug) \
|
||||||
P(defineProperties) \
|
P(defineProperties) \
|
||||||
P(defineProperty) \
|
P(defineProperty) \
|
||||||
|
|
|
@ -64,6 +64,7 @@ void ObjectConstructor::initialize(GlobalObject& global_object)
|
||||||
define_native_function(vm.names.keys, keys, 1, attr);
|
define_native_function(vm.names.keys, keys, 1, attr);
|
||||||
define_native_function(vm.names.values, values, 1, attr);
|
define_native_function(vm.names.values, values, 1, attr);
|
||||||
define_native_function(vm.names.entries, entries, 1, attr);
|
define_native_function(vm.names.entries, entries, 1, attr);
|
||||||
|
define_native_function(vm.names.create, create, 2, attr);
|
||||||
}
|
}
|
||||||
|
|
||||||
ObjectConstructor::~ObjectConstructor()
|
ObjectConstructor::~ObjectConstructor()
|
||||||
|
@ -311,4 +312,31 @@ JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::entries)
|
||||||
return Array::create_from(global_object, obj_arg->get_enumerable_own_property_names(PropertyKind::KeyAndValue));
|
return Array::create_from(global_object, obj_arg->get_enumerable_own_property_names(PropertyKind::KeyAndValue));
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// 20.1.2.2 Object.create, https://tc39.es/ecma262/#sec-object.create
|
||||||
|
JS_DEFINE_NATIVE_FUNCTION(ObjectConstructor::create)
|
||||||
|
{
|
||||||
|
auto prototype_value = vm.argument(0);
|
||||||
|
auto properties = vm.argument(1);
|
||||||
|
|
||||||
|
Object* prototype;
|
||||||
|
if (prototype_value.is_null()) {
|
||||||
|
prototype = nullptr;
|
||||||
|
} else if (prototype_value.is_object()) {
|
||||||
|
prototype = &prototype_value.as_object();
|
||||||
|
} else {
|
||||||
|
vm.throw_exception<TypeError>(global_object, ErrorType::ObjectPrototypeWrongType);
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
|
||||||
|
auto* object = Object::create_empty(global_object);
|
||||||
|
object->set_prototype(prototype);
|
||||||
|
|
||||||
|
if (!properties.is_undefined()) {
|
||||||
|
object->define_properties(properties);
|
||||||
|
if (vm.exception())
|
||||||
|
return {};
|
||||||
|
}
|
||||||
|
return object;
|
||||||
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
@ -61,6 +61,7 @@ private:
|
||||||
JS_DECLARE_NATIVE_FUNCTION(keys);
|
JS_DECLARE_NATIVE_FUNCTION(keys);
|
||||||
JS_DECLARE_NATIVE_FUNCTION(values);
|
JS_DECLARE_NATIVE_FUNCTION(values);
|
||||||
JS_DECLARE_NATIVE_FUNCTION(entries);
|
JS_DECLARE_NATIVE_FUNCTION(entries);
|
||||||
|
JS_DECLARE_NATIVE_FUNCTION(create);
|
||||||
};
|
};
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
@ -0,0 +1,57 @@
|
||||||
|
test("length is 2", () => {
|
||||||
|
expect(Object.create).toHaveLength(2);
|
||||||
|
});
|
||||||
|
|
||||||
|
describe("errors", () => {
|
||||||
|
test("non-object protpotype value", () => {
|
||||||
|
expect(() => Object.create(42)).toThrowWithMessage(
|
||||||
|
TypeError,
|
||||||
|
"Prototype must be an object or null"
|
||||||
|
);
|
||||||
|
});
|
||||||
|
});
|
||||||
|
|
||||||
|
describe("normal behavior", () => {
|
||||||
|
test("creates object with given prototype", () => {
|
||||||
|
let o;
|
||||||
|
|
||||||
|
o = Object.create(null);
|
||||||
|
expect(o).toEqual({});
|
||||||
|
expect(Object.getPrototypeOf(o)).toBe(null);
|
||||||
|
|
||||||
|
const p = {};
|
||||||
|
o = Object.create(p);
|
||||||
|
expect(o).toEqual({});
|
||||||
|
expect(Object.getPrototypeOf(o)).toBe(p);
|
||||||
|
});
|
||||||
|
|
||||||
|
test("creates object with properties from propertiesObject, if given", () => {
|
||||||
|
const o = Object.create(
|
||||||
|
{},
|
||||||
|
{
|
||||||
|
foo: {
|
||||||
|
writable: true,
|
||||||
|
configurable: true,
|
||||||
|
value: "foo",
|
||||||
|
},
|
||||||
|
bar: {
|
||||||
|
enumerable: true,
|
||||||
|
value: "bar",
|
||||||
|
},
|
||||||
|
}
|
||||||
|
);
|
||||||
|
expect(Object.getOwnPropertyNames(o)).toEqual(["foo", "bar"]);
|
||||||
|
expect(Object.getOwnPropertyDescriptor(o, "foo")).toEqual({
|
||||||
|
value: "foo",
|
||||||
|
writable: true,
|
||||||
|
enumerable: false,
|
||||||
|
configurable: true,
|
||||||
|
});
|
||||||
|
expect(Object.getOwnPropertyDescriptor(o, "bar")).toEqual({
|
||||||
|
value: "bar",
|
||||||
|
writable: false,
|
||||||
|
enumerable: true,
|
||||||
|
configurable: false,
|
||||||
|
});
|
||||||
|
});
|
||||||
|
});
|
Loading…
Add table
Add a link
Reference in a new issue