test also for parameter based source name for output file

Author: dmordom

nipype/interfaces/tests/test_base.py

@@ -11,7 +11,7 @@
 from nipype.utils.filemanip import split_filename
 from nipype.interfaces.base import Undefined, config
 from traits.testing.nose_tools import skip
-
+import traits.api as traits
 #test Bunch
 def test_bunch():
     b = nib.Bunch()
@@ -181,6 +181,9 @@ class spec2(nib.CommandLineInputSpec):
         moo = nib.File(name_source=['doo'], hash_files=False, argstr="%s",
                        position=2)
         doo = nib.File(exists=True, argstr="%s", position=1)
+        goo = traits.Int(argstr="%d", position=4)
+        poo = nib.File(name_source=['goo'], hash_files=False, argstr="%d",position=3)
+
     class TestName(nib.CommandLine):
         _cmd = "mycommand"
         input_spec = spec2