docstr: Test get langs methods.
docstr_tok: ["Test","get","langs","methods","."]
code: def test_langs(self):
      """Test get langs methods."""
      self._api.Init(lang="eng")
      lang = self._api.GetInitLanguagesAsString()
      self.assertEqual(lang, "eng")
      langs = self._api.GetLoadedLanguages()
      self.assertEqual(langs, ["eng"])
      self.assertIn("eng", self._api.GetAvailableLanguages())
  
imports: import unittest
  import re
  import os.path
  import tesserocr
label_desc: Use image node_id 11 for calling the TestTessBaseApi obj's underlying member method code with example usage: obj.test_langs() without return types