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LibJS: Implement Temporal.Instant.prototype.epochNanoseconds

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This commit is contained in:
Linus Groh 2021-07-08 22:20:49 +01:00
parent b5d0cdc97e
commit 117323f2d9
4 changed files with 44 additions and 0 deletions
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1
Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h
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@ -115,6 +115,7 @@ namespace JS {
P(enumerable) \
P(epochMicroseconds) \
P(epochMilliseconds) \
P(epochNanoseconds) \
P(epochSeconds) \
P(error) \
P(errors) \

17
Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp
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@ -26,6 +26,7 @@ void InstantPrototype::initialize(GlobalObject& global_object)
define_native_accessor(vm.names.epochSeconds, epoch_seconds_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.epochMilliseconds, epoch_milliseconds_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.epochMicroseconds, epoch_microseconds_getter, {}, Attribute::Configurable);
define_native_accessor(vm.names.epochNanoseconds, epoch_nanoseconds_getter, {}, Attribute::Configurable);
// 8.3.2 Temporal.Instant.prototype[ @@toStringTag ], https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype-@@tostringtag
define_direct_property(*vm.well_known_symbol_to_string_tag(), js_string(vm.heap(), "Temporal.Instant"), Attribute::Configurable);
@ -101,4 +102,20 @@ JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::epoch_microseconds_getter)
return js_bigint(vm.heap(), move(us));
}
// 8.3.6 get Temporal.Instant.prototype.epochNanoseconds, https://tc39.es/proposal-temporal/#sec-get-temporal.instant.prototype.epochnanoseconds
JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::epoch_nanoseconds_getter)
{
// 1. Let instant be the this value.
// 2. Perform ? RequireInternalSlot(instant, [[InitializedTemporalInstant]]).
auto* instant = typed_this(global_object);
if (vm.exception())
return {};
// 3. Let ns be instant.[[Nanoseconds]].
auto& ns = instant->nanoseconds();
// 4. Return ns.
return &ns;
}
}

1
Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.h
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@ -22,6 +22,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(epoch_seconds_getter);
JS_DECLARE_NATIVE_FUNCTION(epoch_milliseconds_getter);
JS_DECLARE_NATIVE_FUNCTION(epoch_microseconds_getter);
JS_DECLARE_NATIVE_FUNCTION(epoch_nanoseconds_getter);
};
}

25
Userland/Libraries/LibJS/Tests/builtins/Temporal/Instant/Instant.prototype.epochNanoseconds.js Normal file
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@ -0,0 +1,25 @@
describe("correct behavior", () => {
test("basic functionality", () => {
expect(new Temporal.Instant(0n).epochNanoseconds).toBe(0n);
expect(new Temporal.Instant(1n).epochNanoseconds).toBe(1n);
expect(new Temporal.Instant(999n).epochNanoseconds).toBe(999n);
expect(new Temporal.Instant(8_640_000_000_000_000_000_000n).epochNanoseconds).toBe(
8_640_000_000_000_000_000_000n
);
expect(new Temporal.Instant(-0n).epochNanoseconds).toBe(-0n);
expect(new Temporal.Instant(-1n).epochNanoseconds).toBe(-1n);
expect(new Temporal.Instant(-999n).epochNanoseconds).toBe(-999n);
expect(new Temporal.Instant(-8_640_000_000_000_000_000_000n).epochNanoseconds).toBe(
-8_640_000_000_000_000_000_000n
);
});
});
test("errors", () => {
test("this value must be a Temporal.Instant object", () => {
expect(() => {
Reflect.get(Temporal.Instant.prototype, "epochNanoseconds", "foo");
}).toThrowWithMessage(TypeError, "Not a Temporal.Instant");
});
});