1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-missing.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-missing.js
new file mode 100644
index 0000000000..6e0903c21d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-missing.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced deletes the elements after start when called with one argument
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  9. Else if deleteCount is not present, then
+    a. Let actualDeleteCount be len - actualStart.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = ["first", "second", "third"].toSpliced(1);
+
+assert.compareArray(result, ["first"]);
+
+reportCompare(0, 0);