1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/sort/comparefn-is-undefined.js b/js/src/tests/test262/built-ins/TypedArray/prototype/sort/comparefn-is-undefined.js
new file mode 100644
index 0000000000..f63e734f2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/sort/comparefn-is-undefined.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.sort
+description: >
+  Treats explicit undefined comparefn the same as implicit undefined comparefn
+info: |
+  %TypedArray%.prototype.sort ( comparefn )
+
+  1. If comparefn is not undefined and IsCallable(comparefn) is false, throw a TypeError exception.
+  ...
+includes: [compareArray.js, testTypedArray.js]
+features: [TypedArray]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  let sample = new TA([42, 44, 46, 43, 45]);
+  let explicit = sample.sort(undefined);
+  let implicit = sample.sort();
+
+  assert.compareArray(explicit, [42, 43, 44, 45, 46], 'The value of `explicit` is [42, 43, 44, 45, 46]');
+  assert.compareArray(implicit, [42, 43, 44, 45, 46], 'The value of `implicit` is [42, 43, 44, 45, 46]');
+});
+
+reportCompare(0, 0);