LibJS: Expose BYTES_PER_ELEMENT on each TypedArray

1 files changed, 18 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.BYTES_PER_ELEMENT.js b/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.BYTES_PER_ELEMENT.js
new file mode 100644
index 0000000000..3d221eebd9
--- /dev/null
+++ b/Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.BYTES_PER_ELEMENT.js
@@ -0,0 +1,18 @@
+// Update when more typed arrays get added
+const TYPED_ARRAYS = [
+    { array: Uint8Array, expected: 1 },
+    { array: Uint16Array, expected: 2 },
+    { array: Uint32Array, expected: 4 },
+    { array: Int8Array, expected: 1 },
+    { array: Int16Array, expected: 2 },
+    { array: Int32Array, expected: 4 },
+    { array: Float32Array, expected: 4 },
+    { array: Float64Array, expected: 8 },
+];
+
+test("basic functionality", () => {
+    TYPED_ARRAYS.forEach(T => {
+        const typedArray = new T.array();
+        expect(typedArray.BYTES_PER_ELEMENT).toBe(T.expected);
+    });
+});