1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-start.js
new file mode 100644
index 0000000000..7faf5378eb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-start.js
@@ -0,0 +1,59 @@
+// 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 out of bounds negative start argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(0, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(0, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(2, -10), [0, 1, 0, 1, 2],
+  '[0, 1, 2, 3, 4].copyWithin(2, -10) must return [0, 1, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(2, -Infinity), [1, 2, 1, 2, 3],
+  '[1, 2, 3, 4, 5].copyWithin(2, -Infinity) must return [1, 2, 1, 2, 3]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(10, -10), [0, 1, 2, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(10, -10) must return [0, 1, 2, 3, 4]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(10, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(10, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-9, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(-9, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(-9, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(-9, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+reportCompare(0, 0);