Test for aliasing of typed data for setRange

Test for aliasing of typed data for setRange

BUG=
R=lrn@google.com

Committed: https://code.google.com/p/dart/source/detail?r=30817

[sra1, 2013-11-21 05:10:28]

Please review this test in the light of Issue 15231.

If we are agreed on the proposed steps in Issue 15231 then I will extend the
test with more cases.

[Lasse Reichstein Nielsen, 2013-11-21 09:50:37]

https://codereview.chromium.org/80163002/diff/1/tests/lib/typed_data/typed_da...
File tests/lib/typed_data/typed_data_setRange_test.dart (right):

https://codereview.chromium.org/80163002/diff/1/tests/lib/typed_data/typed_da...
tests/lib/typed_data/typed_data_setRange_test.dart:33: Expect.equals('[1, 2, 3,
4, 5, 6, 7, 8]', '$a2');
It's pretty neat if you can avoid problems with overlapping buffers, but it's
more than what would be required for setRange.
It only guarantees that overlapping moves work if the *same* object is used as
receiver and source.
So, if this is costly (which is possible if the overlapping regions are not
aligned - is that allowed?), it is probably not worth it.

[Lasse Reichstein Nielsen, 2013-11-25 07:16:48]

lgtm

https://codereview.chromium.org/80163002/diff/1/tests/lib/typed_data/typed_da...
File tests/lib/typed_data/typed_data_setRange_test.dart (right):

https://codereview.chromium.org/80163002/diff/1/tests/lib/typed_data/typed_da...
tests/lib/typed_data/typed_data_setRange_test.dart:33: Expect.equals('[1, 2, 3,
4, 5, 6, 7, 8]', '$a2');
But if TypedArray.set does the job efficiently, by all means use it!

https://codereview.chromium.org/80163002/diff/1/tests/lib/typed_data/typed_da...
tests/lib/typed_data/typed_data_setRange_test.dart:34: 
Consider testing overlapping moves in the same list too, with overlaps in both
directions (source before dest, dest before source).

[sra1, 2013-12-03 17:50:41]

Committed patchset #2 manually as r30817 (presubmit successful).