1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Iterator/prototype/every/predicate-returns-non-boolean.js b/js/src/tests/test262/built-ins/Iterator/prototype/every/predicate-returns-non-boolean.js
new file mode 100644
index 0000000000..4130445ff5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Iterator/prototype/every/predicate-returns-non-boolean.js
@@ -0,0 +1,33 @@
+// |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.every
+description: >
+  Iterator.prototype.every coerces predicate return value to boolean
+info: |
+  %Iterator.prototype%.every ( predicate )
+
+  4.f. If ToBoolean(result) is false, return ? IteratorClose(iterated, NormalCompletion(false)).
+
+features: [iterator-helpers]
+flags: []
+---*/
+function* g() {
+  for (let i = 4; i >= 0; --i) {
+    yield i;
+  }
+}
+
+let iter = g();
+
+let predicateCalls = 0;
+let result = iter.every(v => {
+  ++predicateCalls;
+  return v;
+});
+
+assert.sameValue(result, false);
+assert.sameValue(predicateCalls, 5);
+
+reportCompare(0, 0);