1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Iterator/prototype/take/return-is-not-forwarded-after-exhaustion.js b/js/src/tests/test262/built-ins/Iterator/prototype/take/return-is-not-forwarded-after-exhaustion.js
new file mode 100644
index 0000000000..edb5b7deef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Iterator/prototype/take/return-is-not-forwarded-after-exhaustion.js
@@ -0,0 +1,53 @@
+// |reftest| shell-option(--enable-iterator-helpers) skip-if(!this.hasOwnProperty('Iterator')||!xulRuntime.shell) -- iterator-helpers is not enabled unconditionally, requires shell-options
+// Copyright (C) 2023 Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-iteratorprototype.take
+description: >
+  Underlying iterator return is not called after result iterator observes that underlying iterator is exhausted
+info: |
+  %Iterator.prototype%.take ( limit )
+
+features: [iterator-helpers]
+flags: []
+---*/
+let returnCount = 0;
+
+class TestIterator extends Iterator {
+  next() {
+    return {
+      done: true,
+      value: undefined,
+    };
+  }
+  return() {
+    throw new Test262Error();
+  }
+}
+
+let iterator = new TestIterator().take(0);
+assert.throws(Test262Error, function () {
+  iterator.return();
+});
+iterator.next();
+iterator.return();
+
+iterator = new TestIterator().take(1);
+iterator.next();
+iterator.return();
+
+iterator = new TestIterator().take(1);
+assert.throws(Test262Error, function () {
+  iterator.return();
+});
+iterator.next();
+iterator.return();
+
+iterator = new TestIterator().take(1).take(1).take(1).take(1).take(1);
+assert.throws(Test262Error, function () {
+  iterator.return();
+});
+iterator.next();
+iterator.return();
+
+reportCompare(0, 0);