1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-called-for-each-array-property.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-called-for-each-array-property.js
new file mode 100644
index 0000000000..487719742b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-called-for-each-array-property.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Predicate is called for each array property.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  ...
+features: [array-find-from-last]
+---*/
+
+var arr = [undefined, , , 'foo'];
+var called = 0;
+
+arr.findLastIndex(function() {
+  called++;
+});
+
+assert.sameValue(called, 4);
+
+reportCompare(0, 0);