code: def test_prepare_ud_filepaths():
      expected_output = ["https://a/b"]
  
      filepaths_1 = ud_utils.prepare_ud_filepaths(
          path_prefix="https://a", filepaths="b"
      )
      filepaths_2 = ud_utils.prepare_ud_filepaths(
          path_prefix="https://a", filepaths=["b"]
      )
  
      assert filepaths_1 == expected_output
      assert filepaths_2 == expected_output
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_prepare_ud_filepaths() without return types