TEST: test the fallback to in-memory

Modules/Wrappers/SWIG/test/python/PythonConnectApplications.py

@@ -52,8 +52,9 @@ def test(otb, argv):
   #---------------------------------------------------------------------------
   # Second run with on-disk connections
   app1.OUT = argv[2]+"_tmp1.tif"
-  app2.OUT = argv[2]+"_tmp2.tif"
   app3.OUT = argv[2]+"_tmp3.tif"
 
+  # app2.OUT is left empty and should fallback to memory connection
+
   app4.PropagateConnectMode(False)
   app4.ExecuteAndWriteOutput()