LibJS: Implement Temporal.Duration.prototype.nanoseconds

Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h

@@ -244,6 +244,7 @@ namespace JS {
  P(months) \
  P(multiline) \
  P(name) \
+ P(nanoseconds) \
  P(next) \
  P(now) \
  P(of) \

Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp

@@ -34,6 +34,7 @@ void DurationPrototype::initialize(GlobalObject& global_object)
  define_native_accessor(vm.names.seconds, seconds_getter, {}, Attribute::Configurable);
  define_native_accessor(vm.names.milliseconds, milliseconds_getter, {}, Attribute::Configurable);
  define_native_accessor(vm.names.microseconds, microseconds_getter, {}, Attribute::Configurable);
+ define_native_accessor(vm.names.nanoseconds, nanoseconds_getter, {}, Attribute::Configurable);
 }
 
 static Duration* typed_this(GlobalObject& global_object)
@@ -166,4 +167,17 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::microseconds_getter)
  return Value(duration->microseconds());
 }
 
+// 7.3.12 get Temporal.Duration.prototype.nanoseconds, https://tc39.es/proposal-temporal/#sec-get-temporal.duration.prototype.nanoseconds
+JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::nanoseconds_getter)
+{
+ // 1. Let duration be the this value.
+ // 2. Perform ? RequireInternalSlot(duration, [[InitializedTemporalDuration]]).
+ auto* duration = typed_this(global_object);
+ if (vm.exception())
+ return {};
+
+ // 3. Return duration.[[Nanoseconds]].
+ return Value(duration->nanoseconds());
+}
+
 }

Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.h

@@ -28,6 +28,7 @@ class DurationPrototype final : public Object {
  JS_DECLARE_NATIVE_FUNCTION(seconds_getter);
  JS_DECLARE_NATIVE_FUNCTION(milliseconds_getter);
  JS_DECLARE_NATIVE_FUNCTION(microseconds_getter);
+ JS_DECLARE_NATIVE_FUNCTION(nanoseconds_getter);
 };
 
 }

Userland/Libraries/LibJS/Tests/builtins/Temporal/Duration/Duration.prototype.nanoseconds.js

@@ -0,0 +1,14 @@
+describe("correct behavior", () => {
+ test("basic functionality", () => {
+ const duration = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, 123);
+ expect(duration.nanoseconds).toBe(123);
+ });
+});
+
+test("errors", () => {
+ test("this value must be a Temporal.Duration object", () => {
+ expect(() => {
+ Reflect.get(Temporal.Duration.prototype, "nanoseconds", "foo");
+ }).toThrowWithMessage(TypeError, "Not a Temporal.Duration");
+ });
+});