enh: add test from #2431

Author: mgxd

nipype/pipeline/engine/tests/test_base.py

@@ -6,6 +6,8 @@
 import pytest
 from ..base import EngineBase
 from ....interfaces import base as nib
+from ....interfaces import utility as niu
+from ... import engine as pe
 
 
 class InputSpec(nib.TraitedSpec):
@@ -64,3 +66,24 @@ def test_clone():
 
     with pytest.raises(ValueError):
         base.clone('nodename')
+
+def test_clone_node_iterables(tmpdir):
+    tmpdir.chdir()
+
+    def addstr(string):
+        return ('%s+2' % string )
+
+    subject_list = ['sub-001', 'sub-002']
+    inputnode = pe.Node(niu.IdentityInterface(fields = ['subject']),
+                            name = 'inputnode')
+    inputnode.iterables = [('subject', subject_list)]
+
+    node_1 = pe.Node(niu.Function(input_names='string',
+                                  output_names= 'string',
+                                  function = addstr),name='node_1')
+    node_2 = node_1.clone('node_2')
+
+    workflow = pe.Workflow(name='iter_clone_wf')
+    workflow.connect([(inputnode, node_1, [('subject','string')]),
+                      (node_1, node_2, [('string','string')])])
+    workflow.run()