Check examples when running tests

Add testcase that executes all examples from taskflow/examples
directory. For examples with somewhat deterministic output the output
is also checked.

This commit also fixes couple of examples broken by recent decorators
refactoring.

Change-Id: I3e65eabde43e1dd26b442d8f7dd3f062bf80703d

1 files changed, 6 insertions, 0 deletions

diff --git a/taskflow/examples/simple_linear_listening.py b/taskflow/examples/simple_linear_listening.py
index c53cc62..533f424 100644
--- a/taskflow/examples/simple_linear_listening.py
+++ b/taskflow/examples/simple_linear_listening.py
@@ -8,19 +8,23 @@ my_dir_path = os.path.dirname(os.path.abspath(__file__))
 sys.path.insert(0, os.path.join(os.path.join(my_dir_path, os.pardir),
                                 os.pardir))
 
+from taskflow import decorators
 from taskflow.patterns import linear_flow as lf
 
 
+@decorators.task
 def call_jim(context):
     print("Calling jim.")
     print("Context = %s" % (context))
 
 
+@decorators.task
 def call_joe(context):
     print("Calling joe.")
     print("Context = %s" % (context))
 
 
+@decorators.task
 def flow_watch(state, details):
     flow = details['flow']
     old_state = details['old_state']
@@ -29,6 +33,7 @@ def flow_watch(state, details):
     print('Flow "%s": context=%s' % (flow.name, context))
 
 
+@decorators.task
 def task_watch(state, details):
     flow = details['flow']
     runner = details['runner']
@@ -43,6 +48,7 @@ flow.add(call_joe)
 flow.notifier.register('*', flow_watch)
 flow.task_notifier.register('*', task_watch)
 
+
 context = {
     "joe_number": 444,
     "jim_number": 555,