1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/toLocaleString-detached.js b/js/src/tests/non262/TypedArray/toLocaleString-detached.js
new file mode 100644
index 0000000000..fe95ae689c
--- /dev/null
+++ b/js/src/tests/non262/TypedArray/toLocaleString-detached.js
@@ -0,0 +1,38 @@
+if (typeof detachArrayBuffer === "function") {
+    const originalNumberToLocaleString = Number.prototype.toLocaleString;
+
+    // Throws if array buffer is detached.
+    for (let constructor of typedArrayConstructors) {
+        let typedArray = new constructor(42);
+        detachArrayBuffer(typedArray.buffer);
+        assertThrowsInstanceOf(() => typedArray.toLocaleString(), TypeError);
+    }
+
+    // Throws a TypeError if detached in Number.prototype.toLocaleString.
+    for (let constructor of typedArrayConstructors) {
+        Number.prototype.toLocaleString = function() {
+            "use strict";
+            if (!detached) {
+                detachArrayBuffer(typedArray.buffer);
+                detached = true;
+            }
+            return this;
+        };
+
+        // No error for single element arrays.
+        let detached = false;
+        let typedArray = new constructor(1);
+        assertEq(typedArray.toLocaleString(), "0");
+        assertEq(detached, true);
+
+        // TypeError if more than one element is present.
+        detached = false;
+        typedArray = new constructor(2);
+        assertThrowsInstanceOf(() => typedArray.toLocaleString(), TypeError);
+        assertEq(detached, true);
+    }
+    Number.prototype.toLocaleString = originalNumberToLocaleString;
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);