old_contents: import unittest
  import os
  from desc.input_output import read_input
  
  
  class TestIO(unittest.TestCase):
      """tests for input/output functions"""
  
      def test_min_input(self):
          dirname = os.path.dirname(__file__)
          filename = os.path.join(dirname, 'MIN_INPUT')
          inputs = read_input(filename)
          
          self.assertEqual(len(inputs), 24)
new_contents: import unittest
  import os
  from desc.input_output import read_input
  
  
  class TestIO(unittest.TestCase):
      """tests for input/output functions"""
  
      def test_min_input(self):
          dirname = os.path.dirname(__file__)
          filename = os.path.join(dirname, 'MIN_INPUT')
          inputs = read_input(filename)
  
          self.assertEqual(len(inputs), 25)
  
subject: Update test_input_output for optim_method option