text: import unittest
  
  from load_data import load_train_data, load_test_data, load_train_labels, load_test_labels
  
  
  class TestDataLoadingFunctions(unittest.TestCase):
  
      def test_training_data_has_60_000_examples(self):
          self.assertEqual(len(load_train_data()), 60_000)
  
      def test_training_labels_has_60_000_examples(self):
          self.assertEqual(len(load_train_labels()), 60_000)
  
      def test_testing_data_has_10_000_examples(self):
          self.assertEqual(len(load_test_data()), 10_000)
  
      def test_testing_labels_has_10_000_examples(self):
          self.assertEqual(len(load_test_labels()), 10_000)
  
  
  if __name__ == '__main__':
      unittest.main()
  