code: def test_join_with_slash(self):
      self.assertEqual(
          "path/to/dir/file", join_with_slash("path/to/dir/", "file")
      )
      self.assertEqual(
          "path/to/dir/file", join_with_slash("path/to/dir", "file")
      )
      self.assertEqual(
          "http://algorithms/part",
          join_with_slash("http://algorithms", "part"),
      )
      self.assertEqual(
          "http://algorithms/part",
          join_with_slash("http://algorithms/", "part"),
      )
  
file_path: keon-algos/tests/test_unix.py
imports: from algorithms.unix import join_with_slash, full_path, split, simplify_path_v1, simplify_path_v2
  import os
  import unittest
label_desc: Use image node_id 1 for calling the TestUnixPath obj's underlying member method code with example usage: obj.test_join_with_slash() without return types