1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Iterator/prototype/forEach/get-next-method-only-once.js b/js/src/tests/test262/built-ins/Iterator/prototype/forEach/get-next-method-only-once.js
new file mode 100644
index 0000000000..06e64bf63d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Iterator/prototype/forEach/get-next-method-only-once.js
@@ -0,0 +1,39 @@
+// |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.forEach
+description: >
+  Gets the next method from the iterator only once
+info: |
+  %Iterator.prototype%.forEach ( fn )
+
+features: [iterator-helpers]
+flags: []
+---*/
+let nextGets = 0;
+
+class TestIterator extends Iterator {
+  get next() {
+    ++nextGets;
+    let counter = 5;
+    return function () {
+      if (counter < 0) {
+        return { done: true, value: undefined };
+      } else {
+        return { done: false, value: --counter };
+      }
+    };
+  }
+}
+
+let iterator = new TestIterator();
+
+assert.sameValue(nextGets, 0);
+assert.sameValue(
+  iterator.forEach(() => {}),
+  undefined
+);
+assert.sameValue(nextGets, 1);
+
+reportCompare(0, 0);