code: def test_to_str_errors_replace():
      assert strings.to_str("abcабв", "ascii")
      assert strings.to_str("абв", "ascii")
  
imports: import pytest
  import six
  from library.python import strings
label_desc: Use image node_id 5 for calling a global function with example usage: test_to_str_errors_replace() without return types