test: include 'whiteboard' in preserved parameters

Whiteboard was (probably accidentally) removed from the test attributes.
This patch recreates the whiteboard.
Signed-off-by: NAmador Pahim <apahim@redhat.com>

avocado/core/test.py

@@ -60,7 +60,7 @@ TEST_STATE_ATTRIBUTES = ('name', 'logdir', 'logfile',
                          'status', 'running', 'paused',
                          'time_start', 'time_elapsed', 'time_end',
                          'fail_reason', 'fail_class', 'traceback',
-                         'params', 'timeout')
+                         'params', 'timeout', 'whiteboard')
 
 
 class RawFileHandler(logging.FileHandler):

selftests/unit/test_runner_queue.py

+import argparse
+import shutil
+import tempfile
+import unittest
+
+from multiprocessing import queues
+
+from avocado.core.job import Job
+from avocado.core.result import Result
+from avocado.core.runner import TestRunner
+from avocado.core.tree import TreeNode
+
+
+class TestRunnerQueue(unittest.TestCase):
+    """
+    Test the Runner/Test Queue
+    """
+
+    def setUp(self):
+        self.tmpdir = tempfile.mkdtemp(prefix="avocado_" + __name__)
+        args = argparse.Namespace(base_logdir=self.tmpdir)
+        self.job = Job(args)
+        self.result = Result(self.job)
+
+    def _run_test(self, factory):
+        """
+        Runs a test, specified by the test_factory
+        :param factory: the Avocado Test factory
+        :return: the last queue message from the test
+        """
+        queue = queues.SimpleQueue()
+        runner = TestRunner(job=self.job, result=self.result)
+        runner._run_test(factory, queue)
+        while not queue.empty():
+            msg = queue.get()
+        return msg
+
+    def test_whiteboard(self):
+        """
+        Tests if the whiteboard content is the expected one
+        """
+        factory = ['WhiteBoard',
+                   {'methodName': 'test',
+                    'tags': set([]),
+                    'params': ([TreeNode(name='')], ['/run/*']),
+                    'job': self.job,
+                    'modulePath': 'examples/tests/whiteboard.py',
+                    'base_logdir': self.tmpdir}]
+        msg = self._run_test(factory)
+
+        self.assertEquals(msg['whiteboard'], 'ZGVmYXVsdCB3\n')
+
+    def tearDown(self):
+        shutil.rmtree(self.tmpdir)
+
+
+if __name__ == '__main__':
+    unittest.main()