1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-and-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-and-start.js
new file mode 100644
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+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-and-start.js
@@ -0,0 +1,54 @@
+// 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: >
+  Copy values with non-negative target and start positions.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+  14. Let count be min(final-from, len-to).
+  15. If from<to and to<from+count
+    ...
+  16. Else,
+    a. Let direction = 1.
+  17. Repeat, while count > 0
+    ...
+    a. If fromPresent is true, then
+      i. Let fromVal be Get(O, fromKey).
+      ...
+      iii. Let setStatus be Set(O, toKey, fromVal, true).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  ['a', 'b', 'c', 'd', 'e', 'f'].copyWithin(0, 0),
+  ['a', 'b', 'c', 'd', 'e', 'f']
+);
+
+assert.compareArray(
+  ['a', 'b', 'c', 'd', 'e', 'f'].copyWithin(0, 2),
+  ['c', 'd', 'e', 'f', 'e', 'f']
+);
+
+assert.compareArray(
+  ['a', 'b', 'c', 'd', 'e', 'f'].copyWithin(3, 0),
+  ['a', 'b', 'c', 'a', 'b', 'c']
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(1, 4),
+  [0, 4, 5, 3, 4, 5]
+);
+
+reportCompare(0, 0);