From 64811ab7b64c83034ac48f07fc6d10175eefa8c4 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Wed, 20 Nov 2024 18:12:23 -0500
Subject: [PATCH] LibJS: Implement Temporal.PlainMonthDay.prototype.valueOf

---
 .../LibJS/Runtime/Temporal/PlainMonthDayPrototype.cpp |  8 ++++++++
 .../LibJS/Runtime/Temporal/PlainMonthDayPrototype.h   |  1 +
 .../PlainMonthDay/PlainMonthDay.prototype.valueOf.js  | 11 +++++++++++
 3 files changed, 20 insertions(+)
 create mode 100644 Libraries/LibJS/Tests/builtins/Temporal/PlainMonthDay/PlainMonthDay.prototype.valueOf.js

diff --git a/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.cpp b/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.cpp
index f8f92146ac6..325dc5e7745 100644
--- a/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.cpp
+++ b/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.cpp
@@ -40,6 +40,7 @@ void PlainMonthDayPrototype::initialize(Realm& realm)
     define_native_function(realm, vm.names.toString, to_string, 0, attr);
     define_native_function(realm, vm.names.toLocaleString, to_locale_string, 0, attr);
     define_native_function(realm, vm.names.toJSON, to_json, 0, attr);
+    define_native_function(realm, vm.names.valueOf, value_of, 0, attr);
 }
 
 // 10.3.3 get Temporal.PlainMonthDay.prototype.calendarId, https://tc39.es/proposal-temporal/#sec-get-temporal.plainmonthday.prototype.calendarid
@@ -172,4 +173,11 @@ JS_DEFINE_NATIVE_FUNCTION(PlainMonthDayPrototype::to_json)
     return PrimitiveString::create(vm, temporal_month_day_to_string(month_day, ShowCalendar::Auto));
 }
 
+// 10.3.11 Temporal.PlainMonthDay.prototype.valueOf ( ), https://tc39.es/proposal-temporal/#sec-temporal.plainmonthday.prototype.valueof
+JS_DEFINE_NATIVE_FUNCTION(PlainMonthDayPrototype::value_of)
+{
+    // 1. Throw a TypeError exception.
+    return vm.throw_completion<TypeError>(ErrorType::Convert, "Temporal.PlainMonthDay", "a primitive value");
+}
+
 }
diff --git a/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.h b/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.h
index ace7fbc8005..2780f77aa8c 100644
--- a/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.h
+++ b/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.h
@@ -31,6 +31,7 @@ private:
     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);
 };
 
 }
diff --git a/Libraries/LibJS/Tests/builtins/Temporal/PlainMonthDay/PlainMonthDay.prototype.valueOf.js b/Libraries/LibJS/Tests/builtins/Temporal/PlainMonthDay/PlainMonthDay.prototype.valueOf.js
new file mode 100644
index 00000000000..f8f48e07fc3
--- /dev/null
+++ b/Libraries/LibJS/Tests/builtins/Temporal/PlainMonthDay/PlainMonthDay.prototype.valueOf.js
@@ -0,0 +1,11 @@
+describe("errors", () => {
+    test("throws TypeError", () => {
+        const plainMonthDay = new Temporal.PlainMonthDay(7, 6);
+        expect(() => {
+            plainMonthDay.valueOf();
+        }).toThrowWithMessage(
+            TypeError,
+            "Cannot convert Temporal.PlainMonthDay to a primitive value"
+        );
+    });
+});