diff options
Diffstat (limited to 'Userland/Libraries')
4 files changed, 87 insertions, 0 deletions
diff --git a/Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h b/Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h index a26cba67e8..ebeef2e506 100644 --- a/Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h +++ b/Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h @@ -369,6 +369,7 @@ namespace JS { P(subarray) \ P(substr) \ P(substring) \ + P(subtract) \ P(sup) \ P(tan) \ P(tanh) \ diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp index d749a8182c..5373fdeb44 100644 --- a/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp +++ b/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp @@ -36,6 +36,7 @@ void InstantPrototype::initialize(GlobalObject& global_object) u8 attr = Attribute::Writable | Attribute::Configurable; define_native_function(vm.names.add, add, 1, attr); + define_native_function(vm.names.subtract, subtract, 1, attr); define_native_function(vm.names.round, round, 1, attr); define_native_function(vm.names.equals, equals, 1, attr); define_native_function(vm.names.valueOf, value_of, 0, attr); @@ -152,6 +153,31 @@ JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::add) return create_temporal_instant(global_object, *ns); } +// 8.3.8 Temporal.Instant.prototype.subtract ( temporalDurationLike ), https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.subtract +JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::subtract) +{ + auto temporal_duration_like = vm.argument(0); + + // 1. Let instant be the this value. + // 2. Perform ? RequireInternalSlot(instant, [[InitializedTemporalInstant]]). + auto* instant = typed_this(global_object); + if (vm.exception()) + return {}; + + // 3. Let duration be ? ToLimitedTemporalDuration(temporalDurationLike, « "years", "months", "weeks", "days" »). + auto duration = to_limited_temporal_duration(global_object, temporal_duration_like, { "years"sv, "months"sv, "weeks"sv, "days"sv }); + if (vm.exception()) + return {}; + + // 4. Let ns be ? AddInstant(instant.[[Nanoseconds]], −duration.[[Hours]], −duration.[[Minutes]], −duration.[[Seconds]], −duration.[[Milliseconds]], −duration.[[Microseconds]], −duration.[[Nanoseconds]]). + auto* ns = add_instant(global_object, instant->nanoseconds(), -duration->hours, -duration->minutes, -duration->seconds, -duration->milliseconds, -duration->microseconds, -duration->nanoseconds); + if (vm.exception()) + return {}; + + // 5. Return ! CreateTemporalInstant(ns). + return create_temporal_instant(global_object, *ns); +} + // 8.3.11 Temporal.Instant.prototype.round ( options ), https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.round JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::round) { diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.h b/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.h index 55360e6dd6..b7b420c092 100644 --- a/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.h +++ b/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.h @@ -24,6 +24,7 @@ private: JS_DECLARE_NATIVE_FUNCTION(epoch_microseconds_getter); JS_DECLARE_NATIVE_FUNCTION(epoch_nanoseconds_getter); JS_DECLARE_NATIVE_FUNCTION(add); + JS_DECLARE_NATIVE_FUNCTION(subtract); JS_DECLARE_NATIVE_FUNCTION(round); JS_DECLARE_NATIVE_FUNCTION(equals); JS_DECLARE_NATIVE_FUNCTION(value_of); diff --git a/Userland/Libraries/LibJS/Tests/builtins/Temporal/Instant/Instant.prototype.subtract.js b/Userland/Libraries/LibJS/Tests/builtins/Temporal/Instant/Instant.prototype.subtract.js new file mode 100644 index 0000000000..1f058ebc7f --- /dev/null +++ b/Userland/Libraries/LibJS/Tests/builtins/Temporal/Instant/Instant.prototype.subtract.js @@ -0,0 +1,59 @@ +describe("correct behavior", () => { + test("length is 1", () => { + expect(Temporal.Instant.prototype.subtract).toHaveLength(1); + }); + + test("basic functionality", () => { + const instant = new Temporal.Instant(1625614921000000000n); + const duration = new Temporal.Duration(0, 0, 0, 0, 1, 2, 3, 4, 5, 6); + expect(instant.subtract(duration).epochNanoseconds).toBe(1625611197995994994n); + }); +}); + +describe("errors", () => { + test("this value must be a Temporal.Instant object", () => { + expect(() => { + Temporal.Instant.prototype.subtract.call("foo"); + }).toThrowWithMessage(TypeError, "Not a Temporal.Instant"); + }); + + test("invalid nanoseconds value, positive", () => { + const instant = new Temporal.Instant(8_640_000_000_000_000_000_000n); + const duration = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, -1); + expect(() => { + instant.subtract(duration); + }).toThrowWithMessage( + RangeError, + "Invalid epoch nanoseconds value, must be in range -86400 * 10^17 to 86400 * 10^17" + ); + }); + + test("invalid nanoseconds value, negative", () => { + const instant = new Temporal.Instant(-8_640_000_000_000_000_000_000n); + const duration = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, 1); + expect(() => { + instant.subtract(duration); + }).toThrowWithMessage( + RangeError, + "Invalid epoch nanoseconds value, must be in range -86400 * 10^17 to 86400 * 10^17" + ); + }); + + test("disallowed fields", () => { + const instant = new Temporal.Instant(1625614921000000000n); + for (const [args, property] of [ + [[123, 0, 0, 0], "years"], + [[0, 123, 0, 0], "months"], + [[0, 0, 123, 0], "weeks"], + [[0, 0, 0, 123], "days"], + ]) { + const duration = new Temporal.Duration(...args); + expect(() => { + instant.subtract(duration); + }).toThrowWithMessage( + RangeError, + `Invalid value for duration property '${property}': must be zero, got 123` + ); + } + }); +}); |