STY: Apply ruff/refurb rule FURB118

FURB118 Use `operator.add` instead of defining a function

Author: DimitriPapadopoulos

niworkflows/engine/tests/test_plugin.py

@@ -1,4 +1,5 @@
 import logging
+import operator
 from types import SimpleNamespace
 
 import pytest
@@ -8,10 +9,6 @@
 from ..plugin import MultiProcPlugin
 
 
-def add(x, y):
-    return x + y
-
-
 def addall(inlist):
     import time
 
@@ -28,7 +25,7 @@ def workflow(tmp_path):
 
     # Generate many nodes and claim a lot of memory
     add_nd = pe.MapNode(
-        niu.Function(function=add, input_names=['x', 'y'], output_names=['z']),
+        niu.Function(function=operator.add, input_names=['x', 'y'], output_names=['z']),
         name='add',
         iterfield=['x'],
         mem_gb=0.8,
@@ -39,7 +36,7 @@ def workflow(tmp_path):
 
     # Run without submitting is another code path
     add_more_nd = pe.Node(
-        niu.Function(function=add, input_names=['x', 'y'], output_names=['z']),
+        niu.Function(function=operator.add, input_names=['x', 'y'], output_names=['z']),
         name='add_more',
         run_without_submitting=True,
     )