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LibJS: Implement Temporal.Instant.prototype.toJSON()

This commit is contained in:
Linus Groh 2021-08-31 00:24:46 +01:00 committed by Andreas Kling
parent 463eb361ad
commit c171aa40a8
3 changed files with 37 additions and 0 deletions

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@ -42,6 +42,7 @@ void InstantPrototype::initialize(GlobalObject& global_object)
define_native_function(vm.names.equals, equals, 1, attr);
define_native_function(vm.names.toString, to_string, 0, attr);
define_native_function(vm.names.toLocaleString, to_locale_string, 0, attr);
define_native_function(vm.names.toJSON, to_json, 0, attr);
define_native_function(vm.names.valueOf, value_of, 0, attr);
}
@ -354,6 +355,23 @@ JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::to_locale_string)
return js_string(vm, *string);
}
// 8.3.15 Temporal.Instant.prototype.toJSON ( ), https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.tojson
JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::to_json)
{
// 1. Let instant be the this value.
// 2. Perform ? RequireInternalSlot(instant, [[InitializedTemporalInstant]]).
auto* instant = typed_this(global_object);
if (vm.exception())
return {};
// 3. Return ? TemporalInstantToString(instant, undefined, "auto").
auto string = temporal_instant_to_string(global_object, *instant, js_undefined(), String { "auto"sv });
if (vm.exception())
return {};
return js_string(vm, *string);
}
// 8.3.16 Temporal.Instant.prototype.valueOf ( ), https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.valueof
JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::value_of)
{

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@ -29,6 +29,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(equals);
JS_DECLARE_NATIVE_FUNCTION(to_string);
JS_DECLARE_NATIVE_FUNCTION(to_locale_string);
JS_DECLARE_NATIVE_FUNCTION(to_json);
JS_DECLARE_NATIVE_FUNCTION(value_of);
};

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@ -0,0 +1,18 @@
describe("correct behavior", () => {
test("length is 0", () => {
expect(Temporal.Instant.prototype.toJSON).toHaveLength(0);
});
test("basic functionality", () => {
const instant = new Temporal.Instant(1625614921123456789n);
expect(instant.toJSON()).toBe("2021-07-06T23:42:01.123456789Z");
});
});
describe("errors", () => {
test("this value must be a Temporal.Instant object", () => {
expect(() => {
Temporal.Instant.prototype.toJSON.call("foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.Instant");
});
});