new_contents: """ Test correlation helper methods """
  
  import unittest
  from utility.corr_result_helpers import normalize_values, common_keys, normalize_values_with_samples
  
  
  class TestCorrelationHelpers(unittest.TestCase):
      """Test methods for normalising lists"""
  
      def test_normalize_values(self):
          """Test that a list is normalised correctly"""
          self.assertEqual(
              normalize_values([2.3, None, None, 3.2, 4.1, 5], [
                               3.4, 7.2, 1.3, None, 6.2, 4.1]),
              ([2.3, 4.1, 5], [3.4, 6.2, 4.1], 3)
          )
  
      def test_common_keys(self):
          """Test that common keys are returned as a list"""
          a = dict(BXD1=9.113, BXD2=9.825, BXD14=8.985, BXD15=9.300)
          b = dict(BXD1=9.723, BXD3=9.825, BXD14=9.124, BXD16=9.300)
          self.assertEqual(sorted(common_keys(a, b)), ['BXD1', 'BXD14'])
  
      def test_normalize_values_with_samples(self):
          """Test that a sample(dict) is normalised correctly"""
          self.assertEqual(
              normalize_values_with_samples(
                  dict(BXD1=9.113, BXD2=9.825, BXD14=8.985,
                       BXD15=9.300, BXD20=9.300),
                  dict(BXD1=9.723, BXD3=9.825, BXD14=9.124, BXD16=9.300)),
              (({'BXD1': 9.113, 'BXD14': 8.985}, {'BXD1': 9.723, 'BXD14': 9.124}, 2))
          )
  
subject: Add unittests for *utility/corr_result_helper*