new_contents: import unittest
  import mock
  from pyrsistent import pmap
  from toolz import map
  
  from confusion_matrix.src._confusion_matrix import ConfusionMatrix
  
  
  class ConfusionMatrixTest(unittest.TestCase):
      def setUp(self):
          self.mocked_object_label_a = mock.MagicMock()
          self.mocked_object_label_b = mock.MagicMock()
          self.confusion_matrix = ConfusionMatrix(
              pmap({
                  "a": self.mocked_object_label_a,
                  "b": self.mocked_object_label_b
              }),
              None,
              None
          )
          self.attributes = [
              'accuracy', 'precision', 'recall', 'specificity', 'f1score', 'fall_out', 'miss_rate',
              'FDR', 'FOR', 'NPV', 'PLR', 'NLR', 'DOR'
          ]
  
      def set_attributes(self):
          list(map(
              lambda property_name: setattr(
                  type(self.mocked_object_label_a),
                  property_name,
                  mock.PropertyMock(name=property_name, return_value=1)
              ),
              self.attributes
          ))
  
      def test_averages(self):
          self.set_attributes()
          list(
              map(
                  lambda property_name: self.assertEqual(
                      getattr(self.confusion_matrix, "average_" + property_name),
                      1
                  ),
                  self.attributes
              )
          )
  
subject: Add confusion matrix tests