1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/join/separator-tostring-once-after-resized.js b/js/src/tests/test262/built-ins/TypedArray/prototype/join/separator-tostring-once-after-resized.js
new file mode 100644
index 0000000000..fdae9040c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/join/separator-tostring-once-after-resized.js
@@ -0,0 +1,42 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2024 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-%typedarray%.prototype.join
+description: >
+  ToString is called once when the array is resized.
+info: |
+  %TypedArray%.prototype.join ( separator )
+
+  ...
+  2. Let taRecord be ? ValidateTypedArray(O, seq-cst).
+  3. Let len be TypedArrayLength(taRecord).
+  ...
+  5. Else, let sep be ? ToString(separator).
+  ...
+
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+let rab = new ArrayBuffer(3, {maxByteLength: 5});
+let ta = new Int8Array(rab);
+
+let callCount = 0;
+
+let index = {
+  toString() {
+    callCount++;
+    rab.resize(0);
+    return "-";
+  }
+};
+
+assert.sameValue(callCount, 0);
+
+let r = ta.join(index);
+
+assert.sameValue(callCount, 1);
+assert.sameValue(r, "--");
+
+reportCompare(0, 0);