changinf freesurfer test_preprocess (default number of iterat)

Author: djarecka

nipype/interfaces/freesurfer/tests/test_preprocess.py

@@ -138,13 +138,13 @@ def test_mandatory_outvol(create_files_in_directory):
     # test with custom outfile
     mni.inputs.out_file = 'new_corrected_file.mgz'
     assert mni.cmdline == (
-        'mri_nu_correct.mni --i %s --o new_corrected_file.mgz' % (filelist[0]))
+        'mri_nu_correct.mni --i %s --n 4 --o new_corrected_file.mgz' % (filelist[0]))
 
     # constructor based tests
     mni2 = freesurfer.MNIBiasCorrection(
-        in_file=filelist[0], out_file='bias_corrected_output', iterations=4)
+        in_file=filelist[0], out_file='bias_corrected_output', iterations=2)
     assert mni2.cmdline == (
-        'mri_nu_correct.mni --i %s --n 4 --o bias_corrected_output' %
+        'mri_nu_correct.mni --i %s --n 2 --o bias_corrected_output' %
         filelist[0])