LibJS: Add %TypedArray%.prototype.values

3 files changed, 57 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp b/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp
index 0ce14a7da5..887ea51914 100644
--- a/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp
@@ -35,6 +35,7 @@ void TypedArrayPrototype::initialize(GlobalObject& object)
     define_native_function(vm.names.some, some, 1, attr);
     define_native_function(vm.names.join, join, 1, attr);
     define_native_function(vm.names.keys, keys, 0, attr);
+    define_native_function(vm.names.values, values, 0, attr);
 
     define_native_accessor(*vm.well_known_symbol_to_string_tag(), to_string_tag_getter, nullptr, Attribute::Configurable);
 
@@ -249,6 +250,15 @@ JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::keys)
     return ArrayIterator::create(global_object, typed_array, Object::PropertyKind::Key);
 }
 
+// 23.2.3.30 %TypedArray%.prototype.values ( ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
+JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::values)
+{
+    auto typed_array = typed_array_from(vm, global_object);
+    if (!typed_array)
+        return {};
+    return ArrayIterator::create(global_object, typed_array, Object::PropertyKind::Value);
+}
+
 // 23.2.3.1 get %TypedArray%.prototype.buffer, https://tc39.es/ecma262/#sec-get-%typedarray%.prototype.buffer
 JS_DEFINE_NATIVE_GETTER(TypedArrayPrototype::buffer_getter)
 {
diff --git a/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.h b/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.h
index fc9b1735fe..06a802ff4f 100644
--- a/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.h
+++ b/Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.h
@@ -33,6 +33,7 @@ private:
     JS_DECLARE_NATIVE_FUNCTION(some);
     JS_DECLARE_NATIVE_FUNCTION(join);
     JS_DECLARE_NATIVE_FUNCTION(keys);
+    JS_DECLARE_NATIVE_FUNCTION(values);
 };
 
 }
diff --git a/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.values.js b/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.values.js
new file mode 100644
index 0000000000..c25cc9402a
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.values.js
@@ -0,0 +1,46 @@
+const TYPED_ARRAYS = [
+    Uint8Array,
+    Uint16Array,
+    Uint32Array,
+    Int8Array,
+    Int16Array,
+    Int32Array,
+    Float32Array,
+    Float64Array,
+];
+
+const BIGINT_TYPED_ARRAYS = [BigUint64Array, BigInt64Array];
+
+test("length is 0", () => {
+    TYPED_ARRAYS.forEach(T => {
+        expect(T.prototype.values).toHaveLength(0);
+    });
+
+    BIGINT_TYPED_ARRAYS.forEach(T => {
+        expect(T.prototype.values).toHaveLength(0);
+    });
+});
+
+test("basic functionality", () => {
+    TYPED_ARRAYS.forEach(T => {
+        const a = new T([30, 40, 50]);
+        const it = a.values();
+        expect(it.next()).toEqual({ value: 30, done: false });
+        expect(it.next()).toEqual({ value: 40, done: false });
+        expect(it.next()).toEqual({ value: 50, done: false });
+        expect(it.next()).toEqual({ value: undefined, done: true });
+        expect(it.next()).toEqual({ value: undefined, done: true });
+        expect(it.next()).toEqual({ value: undefined, done: true });
+    });
+
+    BIGINT_TYPED_ARRAYS.forEach(T => {
+        const a = new T([30n, 40n, 50n]);
+        const it = a.values();
+        expect(it.next()).toEqual({ value: 30n, done: false });
+        expect(it.next()).toEqual({ value: 40n, done: false });
+        expect(it.next()).toEqual({ value: 50n, done: false });
+        expect(it.next()).toEqual({ value: undefined, done: true });
+        expect(it.next()).toEqual({ value: undefined, done: true });
+        expect(it.next()).toEqual({ value: undefined, done: true });
+    });
+});