code: def test_token_field_predicate(self):
      assert fn.tokenFieldPredicate("donald") == {"donald"}
      assert fn.tokenFieldPredicate("do\nal d") == {"do", "al", "d"}
      assert fn.tokenFieldPredicate("go-of y  ") == {"go", "of", "y"}
      assert fn.tokenFieldPredicate(" cip   ciop ") == {"cip", "ciop"}
  
imports: import unittest
  from dedupe import predicate_functions
  from dedupe.cpredicates import ngrams
label_desc: Use image node_id 2 for calling the TestPredicateFunctions obj's underlying member method code with example usage: obj.test_token_field_predicate() without return types