fail if exception is not raised

Author: paskino

src/xSTIR/pSTIR/tests/test_algebra.py

@@ -118,8 +118,17 @@ def wrapper(self, func):
                 func(self)
             except Exception as e:
                 print (f"Caught exception in {func.__name__}: {e}")
-
+                return
+            raise AssertionError(f"Expected exception in {func.__name__} but none was raised.")
+        
         for m in a:
             self.__setattr__(m[0], functools.partial(wrapper, self, m[1]))
 
-        self.__setattr__('setUp', functools.partial(wrapper, self, self.setUp))
+        self.__setattr__('setUp', functools.partial(wrapper, self, self.setUp))
+
+    def test_division_by_datacontainer_zero(self):
+        '''Currently cSIRF does not throw any error whilst dividing a datacontainer with zero.
+        The method is set to just pass in the TestSTIRAcquisitionDataSubsetAlgebra base class.
+        
+        For storage_scheme 'file' we want to raise an error though.'''
+        raise RuntimeError("Raising as expected for storage_scheme file, however cSIRF does not throw.")