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LibJS: Implement Temporal.ZonedDateTime.compare

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Luke Wilde 2021-11-07 01:09:09 +00:00 • committed by Idan Horowitz
parent c9ec3295d9
commit ac12581140
3 changed files with 31 additions and 0 deletions
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15
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -31,6 +32,7 @@ void ZonedDateTimeConstructor::initialize(GlobalObject& global_object)
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.from, from, 1, attr);
define_native_function(vm.names.compare, compare, 2, attr);
define_direct_property(vm.names.length, Value(2), Attribute::Configurable);
}
@ -97,4 +99,17 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimeConstructor::from)
return TRY(to_temporal_zoned_date_time(global_object, item, options));
}
// 6.2.3 Temporal.ZonedDateTime.compare ( one, two ), https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.compare
JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimeConstructor::compare)
{
// 1. Set one to ? ToTemporalZonedDateTime(one).
auto* one = TRY(to_temporal_zoned_date_time(global_object, vm.argument(0)));
// 2. Set two to ? ToTemporalZonedDateTime(two).
auto* two = TRY(to_temporal_zoned_date_time(global_object, vm.argument(1)));
// 3. Return 𝔽(! CompareEpochNanoseconds(one.[[Nanoseconds]], two.[[Nanoseconds]])).
return Value(compare_epoch_nanoseconds(one->nanoseconds(), two->nanoseconds()));
}
}

1
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.h
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@ -25,6 +25,7 @@ private:
virtual bool has_constructor() const override { return true; }
JS_DECLARE_NATIVE_FUNCTION(from);
JS_DECLARE_NATIVE_FUNCTION(compare);
};
}

15
Userland/Libraries/LibJS/Tests/builtins/Temporal/ZonedDateTime/ZonedDateTime.compare.js Normal file
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@ -0,0 +1,15 @@
describe("correct behavior", () => {
test("length is 2", () => {
expect(Temporal.ZonedDateTime.compare).toHaveLength(2);
});
test("basic functionality", () => {
const zonedDateTimeOne = new Temporal.ZonedDateTime(1n, new Temporal.TimeZone("UTC"));
const zonedDateTimeTwo = new Temporal.ZonedDateTime(2n, new Temporal.TimeZone("UTC"));
expect(Temporal.ZonedDateTime.compare(zonedDateTimeOne, zonedDateTimeOne)).toBe(0);
expect(Temporal.ZonedDateTime.compare(zonedDateTimeTwo, zonedDateTimeTwo)).toBe(0);
expect(Temporal.ZonedDateTime.compare(zonedDateTimeOne, zonedDateTimeTwo)).toBe(-1);
expect(Temporal.ZonedDateTime.compare(zonedDateTimeTwo, zonedDateTimeOne)).toBe(1);
});
});