1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/set/BigInt/typedarray-arg-set-values-same-buffer-same-type-resized.js b/js/src/tests/test262/built-ins/TypedArray/prototype/set/BigInt/typedarray-arg-set-values-same-buffer-same-type-resized.js
new file mode 100644
index 0000000000..64cb878109
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/set/BigInt/typedarray-arg-set-values-same-buffer-same-type-resized.js
@@ -0,0 +1,48 @@
+// |reftest| skip -- resizable-arraybuffer is not supported
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.set-typedarray-offset
+description: >
+  Set values from different instances using the same buffer and same
+  constructor when underlying ArrayBuffer has been resized
+includes: [testBigIntTypedArray.js, compareArray.js]
+features: [BigInt, TypedArray, resizable-arraybuffer]
+---*/
+
+assert.sameValue(
+  typeof ArrayBuffer.prototype.resize,
+  'function',
+  'implements ArrayBuffer.prototype.resize'
+);
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var ab = new ArrayBuffer(BPE * 4, {maxByteLength: BPE * 5});
+  var source = new TA(ab);
+  var target = new TA(ab);
+  var expected = [10, 20, 30, 40];
+
+  source[0] = 10n;
+  source[1] = 20n;
+  source[2] = 30n;
+  source[3] = 40n;
+
+  try {
+    ab.resize(BPE * 5);
+    expected = [10n, 20n, 30n, 40n, 0n];
+  } catch (_) {}
+
+  target.set(source);
+  assert(compareArray(target, expected), 'following grow');
+
+  try {
+    ab.resize(BPE * 3);
+    expected = [10n, 20n, 30n];
+  } catch (_) {}
+
+  target.set(source);
+  assert(compareArray(target, expected), 'following shrink');
+});
+
+reportCompare(0, 0);