[tests] rename factory test and move bag detecting so any bag is returned as is as an output.

bonobo/execution/node.py

@@ -9,7 +9,7 @@ from bonobo.execution.base import LoopingExecutionContext
 from bonobo.structs.bags import Bag
 from bonobo.structs.inputs import Input
 from bonobo.structs.tokens import Token
-from bonobo.util import get_name, iserrorbag, isloopbackbag
+from bonobo.util import get_name, iserrorbag, isloopbackbag, isbag
 from bonobo.util.compat import deprecated_alias
 from bonobo.util.statistics import WithStatistics
 
@@ -142,7 +142,7 @@ def _resolve(input_bag, output):
     if output is NOT_MODIFIED:
         return input_bag
 
-    if iserrorbag(output):
+    if isbag(output):
         return output
 
     return Bag(output)

tests/nodes/test_factory.py

@@ -11,7 +11,7 @@ from bonobo.util.testing import BufferingNodeExecutionContext
 class FactoryTypeTest(TestCase):
     def execute_node(self, node, *rows):
         with BufferingNodeExecutionContext(node) as context:
-            context.write_sync(*map(Bag, rows))
+            context.write_sync(*rows)
         return context.get_buffer()
 
     def test_args_as_str(self):