add test from issue

Author: lgray

tests/test_processor.py

@@ -25,3 +25,15 @@ def postprocess(self, accumulator):
 
     acc = None
     super(test, proc).postprocess(acc)
+
+def test_issue1408():
+
+    class P(processor.ProcessorABC):
+        def process(self, events):
+            return True
+
+        def postprocess(self, accumulator):
+            pass
+    fileset = {"dy": {"files": {"tests/samples/nano_dy.root": "Events"}}}
+    run = processor.Runner(executor=processor.FuturesExecutor())
+    print(run(fileset=fileset, processor_instance=P(), iteritems_options={"filter_name": lambda name: True}))