code: def test_ReplaceFunFonts(self) -> None:
      aug_fun_fonts = txtaugs.ReplaceFunFonts(
          aug_p=0.8, vary_fonts=False, n=1
      )(self.texts, metadata=self.metadata)
  
      self.assertTrue(
          aug_fun_fonts[0]
          == "𝑻𝒉𝒆 𝒒𝒖𝒊𝒄𝒌 𝒃𝒓𝒐𝒘𝒏 '𝒇𝒐𝒙' 𝒄𝒐𝒖𝒍𝒅𝒏'𝒕 𝒋𝒖𝒎𝒑 𝒐𝒗𝒆𝒓 𝒕𝒉𝒆 𝒈𝒓𝒆𝒆𝒏, 𝒈𝒓𝒂𝒔𝒔𝒚 𝒉𝒊𝒍𝒍."
      )
      self.assertTrue(
          are_equal_metadata(
              self.metadata, self.expected_metadata["replace_fun_fonts"]
          ),
      )
  
imports: import json
  import os
  import random
  import unittest
  from typing import Any, Dict, List
  from augly import text
  from augly.utils import TEXT_METADATA_PATH
label_desc: Use image node_id 15 for calling the TransformsTextUnitTest obj's underlying member method code with example usage: obj.test_ReplaceFunFonts() without return types