1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/subarray/BigInt/result-is-new-instance-with-shared-buffer.js b/js/src/tests/test262/built-ins/TypedArray/prototype/subarray/BigInt/result-is-new-instance-with-shared-buffer.js
new file mode 100644
index 0000000000..3b8ea3c331
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/subarray/BigInt/result-is-new-instance-with-shared-buffer.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.subarray
+description: Returns a new instance sharing the same buffer
+info: |
+  22.2.3.27 %TypedArray%.prototype.subarray( begin , end )
+
+  ...
+  17. Return ? TypedArraySpeciesCreate(O, argumentsList).
+includes: [testBigIntTypedArray.js, compareArray.js]
+features: [BigInt, TypedArray]
+---*/
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+  var sample = new TA([40n, 41n, 42n, 43n]);
+  var buffer = sample.buffer;
+  var result = sample.subarray(1);
+
+  assert.notSameValue(result, sample, "returns a new instance");
+  assert.sameValue(result.buffer, sample.buffer, "shared buffer");
+  assert.sameValue(sample.buffer, buffer, "original buffer is preserved");
+
+  sample[1] = 100n;
+  assert(
+    compareArray(result, [100n, 42n, 43n]),
+    "changes on the original sample values affect the new instance"
+  );
+
+  result[1] = 111n;
+  assert(
+    compareArray(sample, [40n, 100n, 111n, 43n]),
+    "changes on the new instance values affect the original sample"
+  );
+});
+
+reportCompare(0, 0);