From bdf36575c805efbf995fb233f6ea68deff6ba66a Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Thu, 2 Sep 2021 10:50:51 -0400
Subject: [PATCH] LibJS: Implement Intl.Locale.prototype.numeric

---
 .../LibJS/Runtime/Intl/LocalePrototype.cpp       | 14 ++++++++++++++
 .../LibJS/Runtime/Intl/LocalePrototype.h         |  1 +
 .../Intl/Locale/Locale.prototype.numeric.js      | 16 ++++++++++++++++
 3 files changed, 31 insertions(+)
 create mode 100644 Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.numeric.js

diff --git a/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.cpp
index a8e11e443f..fa82a5841d 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.cpp
@@ -52,6 +52,7 @@ void LocalePrototype::initialize(GlobalObject& global_object)
     define_native_accessor(vm.names.collation, collation, {}, Attribute::Configurable);
     define_native_accessor(vm.names.hourCycle, hour_cycle, {}, Attribute::Configurable);
     define_native_accessor(vm.names.numberingSystem, numbering_system, {}, Attribute::Configurable);
+    define_native_accessor(vm.names.numeric, numeric, {}, Attribute::Configurable);
 }
 
 // 14.3.5 Intl.Locale.prototype.toString ( ), https://tc39.es/ecma402/#sec-Intl.Locale.prototype.toString
@@ -109,4 +110,17 @@ JS_DEFINE_NATIVE_GETTER(LocalePrototype::base_name)
 JS_ENUMERATE_LOCALE_KEYWORD_PROPERTIES
 #undef __JS_ENUMERATE
 
+// 14.3.11 get Intl.Locale.prototype.numeric, https://tc39.es/ecma402/#sec-Intl.Locale.prototype.numeric
+JS_DEFINE_NATIVE_GETTER(LocalePrototype::numeric)
+{
+    // 1. Let loc be the this value.
+    // 2. Perform ? RequireInternalSlot(loc, [[InitializedLocale]]).
+    auto* locale_object = typed_this(global_object);
+    if (!locale_object)
+        return {};
+
+    // 3. Return loc.[[Numeric]].
+    return Value(locale_object->numeric());
+}
+
 }
diff --git a/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.h b/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.h
index 02880cb91d..bdd557c569 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.h
+++ b/Userland/Libraries/LibJS/Runtime/Intl/LocalePrototype.h
@@ -27,6 +27,7 @@ private:
     JS_DECLARE_NATIVE_GETTER(collation);
     JS_DECLARE_NATIVE_GETTER(hour_cycle);
     JS_DECLARE_NATIVE_GETTER(numbering_system);
+    JS_DECLARE_NATIVE_GETTER(numeric);
 };
 
 }
diff --git a/Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.numeric.js b/Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.numeric.js
new file mode 100644
index 0000000000..3dcab9f41b
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/Intl/Locale/Locale.prototype.numeric.js
@@ -0,0 +1,16 @@
+describe("errors", () => {
+    test("called on non-Locale object", () => {
+        expect(() => {
+            Intl.Locale.prototype.numeric;
+        }).toThrowWithMessage(TypeError, "Not a Intl.Locale object");
+    });
+});
+
+describe("normal behavior", () => {
+    test("basic functionality", () => {
+        expect(new Intl.Locale("en").numeric).toBeFalse();
+        expect(new Intl.Locale("en-u-kn-true").numeric).toBeTrue();
+        expect(new Intl.Locale("en", { numeric: false }).numeric).toBeFalse();
+        expect(new Intl.Locale("en-u-kn-false", { numeric: true }).numeric).toBeTrue();
+    });
+});