fix: fast error

Author: satra

nipype/interfaces/fsl/preprocess.py

@@ -1571,7 +1571,7 @@ def _gen_fname(self, name):
         path, outname, ext = split_filename(self.inputs.out_file)
 
         method = 'none'
-        if isdefined(self.inputs.method) and self.inputs.method == 'fast':
+        if isdefined(self.inputs.method) and self.inputs.method != 'none':
             method = 'fast'
 
         if isdefined(self.inputs.method_as_numerical_threshold):

nipype/interfaces/fsl/tests/test_preprocess.py

@@ -564,3 +564,8 @@ def test_fugue():
         yield assert_equal, op.basename(res.outputs.unwarped_file), out_name
 
     teardown_fugue(tmpdir)
+
+
+@skipif(no_fsl)
+def test_first_genfname:
+