1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/BigInt/tonumber-value-detached-buffer.js b/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/BigInt/tonumber-value-detached-buffer.js
new file mode 100644
index 0000000000..974de14c4a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/BigInt/tonumber-value-detached-buffer.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2017 Mozilla Corporation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-integer-indexed-exotic-objects-set-p-v-receiver
+description: >
+  Setting a typed array element to a value that, when converted to the typed
+  array element type, detaches the typed array's underlying buffer,
+  will always return true.
+info: |
+  9.4.5.5 [[Set]] ( P, V, Receiver)
+
+  ...
+  2. If Type(P) is String, then
+    a. Let numericIndex be ! CanonicalNumericIndexString(P).
+    b. If numericIndex is not undefined, then
+      i. Perform ? IntegerIndexedElementSet(O, numericIndex, V).
+      ii. Return true.
+  ...
+includes: [testBigIntTypedArray.js, detachArrayBuffer.js]
+features: [align-detached-buffer-semantics-with-web-reality, BigInt, Reflect, TypedArray]
+---*/
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+  let ta = new TA(1);
+  let isDetached = false;
+  let result = Reflect.set(ta, 0, {
+    valueOf() {
+      $DETACHBUFFER(ta.buffer);
+      isDetached = true;
+      return 42n;
+    }
+  });
+
+  assert.sameValue(result, true);
+  assert.sameValue(ta[0], undefined);
+  assert.sameValue(isDetached, true);
+});
+
+reportCompare(0, 0);