1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/tests/test262/prs/3994/built-ins/Uint8Array/prototype/setFromHex/target-size.js b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/prototype/setFromHex/target-size.js
new file mode 100644
index 0000000000..d73fa1749d
--- /dev/null
+++ b/js/src/tests/test262/prs/3994/built-ins/Uint8Array/prototype/setFromHex/target-size.js
@@ -0,0 +1,32 @@
+// |reftest| shell-option(--enable-uint8array-base64) skip-if(!Uint8Array.fromBase64||!xulRuntime.shell) -- uint8array-base64 is not enabled unconditionally, requires shell-options
+// Copyright (C) 2024 Kevin Gibbons. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-uint8array.prototype.setfromhex
+description: Uint8Array.prototype.setFromHex behavior when target buffer is small
+includes: [compareArray.js]
+features: [uint8array-base64, TypedArray]
+---*/
+
+// buffer too small
+var target = new Uint8Array([255, 255]);
+var result = target.setFromHex('aabbcc');
+assert.sameValue(result.read, 4);
+assert.sameValue(result.written, 2);
+assert.compareArray(target, [170, 187]);
+
+// buffer exact
+var target = new Uint8Array([255, 255, 255]);
+var result = target.setFromHex('aabbcc');
+assert.sameValue(result.read, 6);
+assert.sameValue(result.written, 3);
+assert.compareArray(target, [170, 187, 204]);
+
+// buffer too large
+var target = new Uint8Array([255, 255, 255, 255]);
+var result = target.setFromHex('aabbcc');
+assert.sameValue(result.read, 6);
+assert.sameValue(result.written, 3);
+assert.compareArray(target, [170, 187, 204, 255]);
+
+reportCompare(0, 0);