code: def test_url_2(self):
      text = "việt đẹp mã.ftp://mp3.zing.vn vinh@zing.com.vn"
      actual = tokenize(text, format="text")
      expected = "việt đẹp mã . ftp://mp3.zing.vn vinh@zing.com.vn"
      self.assertEqual(expected, actual)
  
imports: from unittest import TestCase
  from underthesea.pipeline.word_tokenize.regex_tokenize import tokenize
label_desc: Use image node_id 16 for calling the TestTokenize obj's underlying member method code with example usage: obj.test_url_2() without return types