1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-not-called-on-empty-array.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-not-called-on-empty-array.js
new file mode 100644
index 0000000000..a68e8420b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-not-called-on-empty-array.js
@@ -0,0 +1,37 @@
+// 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 only called if this.length is > 0.
+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 »)).
+  6. Return -1.
+features: [array-find-from-last]
+---*/
+
+var called = false;
+
+var predicate = function() {
+  called = true;
+  return true;
+};
+
+var result = [].findLastIndex(predicate);
+
+assert.sameValue(
+  called, false,
+  '[].findLastIndex(predicate) does not call predicate'
+);
+assert.sameValue(
+  result, -1,
+  '[].findLastIndex(predicate) returned undefined'
+);
+
+reportCompare(0, 0);