Merge pull request #224 from pyiron/correct_test

[minor] Correct test

.binder/environment.yml

@@ -22,4 +22,3 @@ dependencies:
 - pyiron_atomistics =0.4.15
 - pyiron-data =0.0.27
 - numpy =1.26.4
-- pip: []

docs/environment.yml

@@ -20,4 +20,3 @@ dependencies:
 - python-graphviz =0.20.1
 - toposort =1.10
 - typeguard =4.1.5
-- pip: []

tests/unit/test_function.py

@@ -39,7 +39,7 @@ class TestFunction(unittest.TestCase):
     def test_instantiation(self):
         with self.subTest("Void function is allowable"):
             void_node = Function(void)
-            self.assertEqual(len(void_node.outputs), 0)
+            self.assertEqual(len(void_node.outputs), 1)
 
         with self.subTest("Args and kwargs at initialization"):
             node = Function(plus_one)