code: def test_decoding(self):
      decoder = Metaspace()
      assert (
          decoder.decode(["▁My", "▁name", "▁is", "▁John"])
          == "My name is John"
      )
      decoder = Metaspace(replacement="-", add_prefix_space=False)
      assert (
          decoder.decode(["-My", "-name", "-is", "-John"])
          == " My name is John"
      )
  
imports: import json
  import pickle
  import pytest
  from tokenizers.decoders import CTC, BPEDecoder, ByteLevel, Decoder, Metaspace, Sequence, WordPiece, ByteFallback, Replace, Strip, Fuse
label_desc: Use image node_id 2 for calling the TestMetaspace obj's underlying member method code with example usage: obj.test_decoding() without return types