1 files changed, 60 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-end.js
new file mode 100644
index 0000000000..3bea4299b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-end.js
@@ -0,0 +1,60 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Set values with negative end argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  12. ReturnIfAbrupt(relativeEnd).
+  13. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let
+  final be min(relativeEnd, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1, -1), [1, 2, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1, -1) must return [1, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(2, 0, -1), [0, 1, 0, 1, 2],
+  '[0, 1, 2, 3, 4].copyWithin(2, 0, -1) must return [0, 1, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(1, 2, -2), [0, 2, 2, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(1, 2, -2) must return [0, 2, 2, 3, 4]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, -2, -1), [2, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, -2, -1) must return [2, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(2, -2, -1), [0, 1, 3, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(2, -2, -1) must return [0, 1, 3, 3, 4]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-3, -2, -1), [0, 2, 2, 3],
+  '[0, 1, 2, 3].copyWithin(-3, -2, -1) must return [0, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-2, -3, -1), [0, 1, 2, 2, 3],
+  '[0, 1, 2, 3, 4].copyWithin(-2, -3, -1) must return [0, 1, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-5, -2, -1), [3, 1, 2, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(-5, -2, -1) must return [3, 1, 2, 3, 4]'
+);
+
+reportCompare(0, 0);