Get codebase ready for actually supporting versioning.

utils/tests/pub/test_pub.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Test infrastructure for testing pub. Unlike typical unit tests, most pub
  * tests are integration tests that stage some stuff on the file system, run
  * pub, and then validate the results. This library provides an API to build
  * tests like that.
  */
@@ skipping 90 matching lines @@
     // TODO(rnystrom): Hack in the cache directory path. Should pass this
     // in using environment var once #752 is done.
     args.add('--cachedir=${pathInSandbox(cachePath)}');
 
     // TODO(rnystrom): Hack in the SDK path. Should pass this in using
     // environment var once #752 is done.
     args.add('--sdkdir=${pathInSandbox(sdkPath)}');
 
     return _runPub(args, pathInSandbox(appPath));
   }).chain((result) {
-    _validateOutput(output, result.stdout);
-
     Expect.equals(result.stderr.length, 0,
         'Did not expect any output on stderr, and got:\n' +
         Strings.join(result.stderr, '\n'));
 
     Expect.equals(result.exitCode, exitCode,
         'Pub returned exit code ${result.exitCode}, expected $exitCode.');
 
+    _validateOutput(output, result.stdout);
+
     return _runScheduled(createdSandboxDir, _scheduledAfterPub);
   });
 
   future.then((_) {
     deleteSandboxIfCreated(asyncDone);
   });
 
   future.handleException((error) {
     // If an error occurs during testing, delete the sandbox, throw the error so
     // that the test framework sees it, then finally call asyncDone so that the
@@ skipping 255 matching lines @@
   _scheduledBeforePub.add(event);
 }
 
 /**
  * Schedules a callback to be called after Pub is run with [runPub].
  */
 void _scheduleAfterPub(_ScheduledEvent event) {
   if (_scheduledAfterPub == null) _scheduledAfterPub = [];
   _scheduledAfterPub.add(event);
 }