improve completion test failure message by adding node info

improve completion test failure message by adding node info

BUG=
R=scheglov@google.com

Committed: https://code.google.com/p/dart/source/detail?r=40885

[danrubel, 2014-10-02 00:06:12]

danrubel@google.com changed reviewers:
+ scheglov@google.com

[scheglov, 2014-10-02 02:28:09]

LGTM

https://codereview.chromium.org/620013002/diff/1/pkg/analysis_server/test/ser...
File pkg/analysis_server/test/services/completion/completion_test_util.dart
(right):

https://codereview.chromium.org/620013002/diff/1/pkg/analysis_server/test/ser...
pkg/analysis_server/test/services/completion/completion_test_util.dart:293:
AstNode node = new NodeLocator.con1(completionOffset).searchWithin(unit);
We could remember the node in "computeFull".

[danrubel, 2014-10-02 16:27:17]

https://codereview.chromium.org/620013002/diff/1/pkg/analysis_server/test/ser...
File pkg/analysis_server/test/services/completion/completion_test_util.dart
(right):

https://codereview.chromium.org/620013002/diff/1/pkg/analysis_server/test/ser...
pkg/analysis_server/test/services/completion/completion_test_util.dart:293:
AstNode node = new NodeLocator.con1(completionOffset).searchWithin(unit);
On 2014/10/02 02:28:08, scheglov wrote:
> We could remember the node in "computeFull".

Good suggestion. Done.

[danrubel, 2014-10-02 16:30:34]

Committed patchset #3 (id:40001) manually as 40885 (presubmit successful).