old_contents: import sys
  import os
  sys.path.append(os.path.abspath(os.path.dirname(__file__) + '../..'))
  import unittest
  from dijkstra import dijkstra
  
  
  class TestBinarySearchTree(unittest.TestCase):
      def test_insert(self):
          """
          test the following graph
  
                a
            5  / \  1
              /   \
             b --- c
          3 /   2
           d
          """
          g = {
              'a': [('b', 5), ('c', 1)],
              'b': [('a', 5), ('c', 2), ('d', 3)],
              'c': [('a', 1), ('b', 2)],
              'd': [('b', 3)],
          }
  
          res = dijkstra(g, 'a')
          expected_res = {
              'a': 0,
              'b': 3,
              'c': 1,
              'd': 6,
          }
  
          self.assertEqual(res, expected_res)
  
new_contents: import sys
  import os
  sys.path.append(os.path.abspath(os.path.dirname(__file__) + '../..'))
  import unittest
  from dijkstra import dijkstra
  
  
  class TestDijkstra(unittest.TestCase):
      def test_insert(self):
          """
          test the following graph
  
                a
            5  / \  1
              /   \
             b --- c
          3 /   2
           d
          """
          g = {
              'a': [('b', 5), ('c', 1)],
              'b': [('a', 5), ('c', 2), ('d', 3)],
              'c': [('a', 1), ('b', 2)],
              'd': [('b', 3)],
          }
  
          res = dijkstra(g, 'a')
          expected_res = {
              'a': 0,
              'b': 3,
              'c': 1,
              'd': 6,
          }
  
          self.assertEqual(res, expected_res)
  
subject: update naming typo