add check for logic in test_vector_functors

Phys/FunctorCore/tests/options/test_vector_functors.py

@@ -44,8 +44,9 @@ if not inside_cache_generation:
 
 
 def add_algorithm(type_suffix, eval_or_init, functors, producer=None):
-    algo_type = getattr(Algorithms,
-                        'TestThOrFunctor' + eval_or_init + '__' + type_suffix)
+    algo_type_str = 'TestThOrFunctor' + eval_or_init + '__' + type_suffix
+    algo_type = getattr(Algorithms, algo_type_str)
+
     functors = {f.code_repr(): f for f in functors}
     kwargs = {}
     if producer is not None:
@@ -58,7 +59,14 @@ def add_algorithm(type_suffix, eval_or_init, functors, producer=None):
         PODFunctors={k: POD(v)
                      for k, v in functors.items()},
         **kwargs).configuration().apply()
+
+    # Get the TestThOrFunctor algorithm which we (knowing some PyConf
+    # externals) should be able to find as the last element in the list
     algo_instance = configurable_algs[-1]
+    # check that the trick from above actually returns the algorithm that we
+    # are looking for.
+    if algo_type_str != algo_instance.getType():
+        raise Exception("test_vector_functors.py: our trick didn't work")
     ApplicationMgr().TopAlg.append(algo_instance)