Chaining of setup/teardown.

Chaining of setup/teardown.

Committed: https://code.google.com/p/dart/source/detail?r=21819

[Siggi Cherem (dart-lang), 2013-04-19 23:55:05]

lgtm, with a suggestion...

https://codereview.chromium.org/14092004/diff/1/pkg/unittest/lib/unittest.dart
File pkg/unittest/lib/unittest.dart (right):

https://codereview.chromium.org/14092004/diff/1/pkg/unittest/lib/unittest.dar...
pkg/unittest/lib/unittest.dart:636: _parentTeardown = _oldParentTeardown;
now that we have 5 of these, it might be worth creating a context object per
group:

class GroupContext {
  String name;
  Function setup;
  Function teardown;
  GroupContext parent;
}

then here you would simply do:
_currentGroup = _currentGroup.parent;

[gram, 2013-04-22 17:11:07]

Committed patchset #3 manually as r21819 (presubmit successful).