Add test for whether a completer or stream controller has been closed.

Add test for whether a completer or stream controller has been closed.


BUG=http://dartbug.com/8638

Committed: https://code.google.com/p/dart/source/detail?r=19211

[Lasse Reichstein Nielsen, 2013-02-20 13:24:12]

Naming is perhaps inconsistent.
It uses "completed" but "isClosed".
The problem is that the correct tense would not be "isCompleted" but
"hasBeenCompleted". Or perhaps "isComplete".

[floitsch, 2013-02-26 13:57:32]

I would like us to use "completed" everywhere. No "complete".
"It is completed" does not mean the same thing as "it is complete", but in the
context of futures both work, and it is much simpler if we stick to one term
("completed").

https://chromiumcodereview.appspot.com/12324004/diff/1/sdk/lib/async/future.dart
File sdk/lib/async/future.dart (right):

https://chromiumcodereview.appspot.com/12324004/diff/1/sdk/lib/async/future.d...
sdk/lib/async/future.dart:369: bool get completed;
has/isCompleted

[floitsch, 2013-02-26 14:02:38]

and LGTM.

[Lasse Reichstein Nielsen, 2013-02-28 11:37:06]

Committed patchset #2 manually as r19211 (presubmit successful).