implemented toStringTag

boa-dev · Dec 9, 2023 · c291beb · c291beb
1 parent 942e140
commit c291beb
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Showing 3 changed files with 16 additions and 1 deletion.
diff --git a/boa_engine/src/builtins/typed_array/builtin.rs b/boa_engine/src/builtins/typed_array/builtin.rs
@@ -2960,7 +2960,11 @@ impl BuiltinTypedArray {
     ///
     /// [spec]: https://tc39.es/ecma262/#sec-get-%typedarray%.prototype-@@tostringtag
     #[allow(clippy::unnecessary_wraps)]
-    fn to_string_tag(this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+    pub(crate) fn to_string_tag(
+        this: &JsValue,
+        _: &[JsValue],
+        _: &mut Context,
+    ) -> JsResult<JsValue> {
         // 1. Let O be the this value.
         // 2. If Type(O) is not Object, return undefined.
         // 3. If O does not have a [[TypedArrayName]] internal slot, return undefined.

diff --git a/boa_engine/src/object/builtins/jstypedarray.rs b/boa_engine/src/object/builtins/jstypedarray.rs
@@ -570,6 +570,12 @@ impl JsTypedArray {
                 .expect("`with` must always return a `TypedArray` on success"),
         })
     }
+
+    /// Calls `TypedArray.prototype.toStringTag()`.
+    #[inline]
+    pub fn to_string_tag(&self, context: &mut Context) -> JsResult<JsValue> {
+        BuiltinTypedArray::to_string_tag(&self.inner.clone().into(), &[], context)
+    }
 }
 
 impl From<JsTypedArray> for JsObject {

diff --git a/boa_examples/src/bin/jstypedarray.rs b/boa_examples/src/bin/jstypedarray.rs
@@ -196,6 +196,11 @@ fn main() -> JsResult<()> {
     //     js_string!("500,00 €,8.123,00 €,12,00 €").into()
     // );
 
+    // toStringTag
+    let array = JsUint8Array::from_iter(vec![1u8, 2u8, 3u8, 4u8, 5u8, 6u8, 7u8, 8u8], context)?;
+    let tag = array.to_string_tag(context)?.to_string(context)?;
+    assert_eq!(tag, js_string!("Uint8Array"));
+
     context
         .register_global_property(
             js_string!("myUint8Array"),