LibJS: Expose TypedArray.prototype.byteLength

1 files changed, 19 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.byteLength.js b/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.byteLength.js
new file mode 100644
index 0000000000..6d647fa46b
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.byteLength.js
@@ -0,0 +1,19 @@
+// Update when more typed arrays get added
+const TYPED_ARRAYS = [
+    { array: Uint8Array, expected: 3 },
+    { array: Uint16Array, expected: 6 },
+    { array: Uint32Array, expected: 12 },
+    { array: Int8Array, expected: 3 },
+    { array: Int16Array, expected: 6 },
+    { array: Int32Array, expected: 12 },
+    { array: Float32Array, expected: 12 },
+    { array: Float64Array, expected: 24 },
+];
+
+test("basic functionality", () => {
+    TYPED_ARRAYS.forEach(T => {
+        const typedArray = new T.array([1, 2, 3]);
+        expect(Object.hasOwn(typedArray, "byteOffset")).toBeFalse();
+        expect(typedArray.byteLength).toBe(T.expected);
+    });
+});