Avoid adding 1 to a failure (if it gets triggered)

Sometimes the CI gate times out and instead of returning
normal results a failure object is returned, so be more
careful on adding integers to those objects.

Closes-Bug: 1478744

Change-Id: Ibdb9d30266d2a7f3bfeacc39e74cf61b44025a56

1 files changed, 5 insertions, 1 deletions

diff --git a/taskflow/tests/utils.py b/taskflow/tests/utils.py
index 266a0e8..f465467 100644
--- a/taskflow/tests/utils.py
+++ b/taskflow/tests/utils.py
@@ -123,7 +123,11 @@ class GiveBackRevert(task.Task):
         return value + 1
 
     def revert(self, *args, **kwargs):
-        return kwargs.get('result') + 1
+        result = kwargs.get('result')
+        # If this somehow fails, timeout, or other don't send back a
+        # valid result...
+        if isinstance(result, six.integer_types):
+            return result + 1
 
 
 class FakeTask(object):