1 files changed, 63 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-target.js b/js/src/tests/test262/built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-target.js
new file mode 100644
index 0000000000..925be0ce7c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-target.js
@@ -0,0 +1,63 @@
+// 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.copywithin
+description: >
+  Set values with out of bounds negative target argument.
+info: |
+  22.2.3.5 %TypedArray%.prototype.copyWithin (target, start [ , end ] )
+
+  %TypedArray%.prototype.copyWithin is a distinct function that implements the
+  same algorithm as Array.prototype.copyWithin as defined in 22.1.3.3 except
+  that the this object's [[ArrayLength]] internal slot is accessed in place of
+  performing a [[Get]] of "length" and the actual copying of values in step 12
+  must be performed in a manner that preserves the bit-level encoding of the
+  source data.
+
+  ...
+
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  4. If relativeTarget < 0, let to be max((len + relativeTarget), 0); else let
+  to be min(relativeTarget, len).
+  ...
+includes: [compareArray.js, testBigIntTypedArray.js]
+features: [BigInt, TypedArray]
+---*/
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+  assert(
+    compareArray(
+      new TA([0n, 1n, 2n, 3n]).copyWithin(-10, 0),
+      [0n, 1n, 2n, 3n]
+    ),
+    '[0, 1, 2, 3].copyWithin(-10, 0) -> [0, 1, 2, 3]'
+  );
+
+  assert(
+    compareArray(
+      new TA([1n, 2n, 3n, 4n, 5n]).copyWithin(-Infinity, 0),
+      [1n, 2n, 3n, 4n, 5n]
+    ),
+    '[1, 2, 3, 4, 5].copyWithin(-Infinity, 0) -> [1, 2, 3, 4, 5]'
+  );
+
+  assert(
+    compareArray(
+      new TA([0n, 1n, 2n, 3n, 4n]).copyWithin(-10, 2),
+      [2n, 3n, 4n, 3n, 4n]
+    ),
+    '[0, 1, 2, 3, 4].copyWithin(-10, 2) -> [2, 3, 4, 3, 4]'
+  );
+
+  assert(
+    compareArray(
+      new TA([1n, 2n, 3n, 4n, 5n]).copyWithin(-Infinity, 2),
+      [3n, 4n, 5n, 4n, 5n]
+    ),
+    '[1, 2, 3, 4, 5].copyWithin(-Infinity, 2) -> [3, 4, 5, 4, 5]'
+  );
+});
+
+reportCompare(0, 0);