code: def test_get_true_cased_text():
      vocab = Vocab()
      words1 = ["Cool", ",", "thanks", "!"]
      spaces1 = [False, True, False, False]
      pos1 = ["ADJ", "PUNCT", "NOUN", "PUNCT"]
      doc1 = get_doc(vocab, words1, spaces1, pos1)
      assert get_true_cased_text(doc1[0:4]) == "cool, thanks!"
      assert get_true_cased_text(doc1[0]) == "cool"
      assert get_true_cased_text(doc1[2:4]) == "thanks!"
      words2 = ["I", "can", "understand", "."]
      spaces2 = [True, True, False, False]
      pos2 = ["PRON", "VERB", "VERB", "PUNCT"]
      doc2 = get_doc(vocab, words2, spaces2, pos2)
      assert get_true_cased_text(doc2[0:4]) == "I can understand."
      assert get_true_cased_text(doc2[0]) == "I"
      assert get_true_cased_text(doc2[2:4]) == "understand."
      words3 = ["You", "think", "Obama", "was", "pretty", "good", "..."]
      spaces3 = [True, True, True, True, True, False, False]
      pos3 = ["PRON", "VERB", "PROPN", "VERB", "ADV", "ADJ", "PUNCT"]
      doc3 = get_doc(vocab, words3, spaces3, pos3)
      doc3.ents = [Span(doc3, 2, 3, label="PERSON")]
      assert (
          get_true_cased_text(doc3[0:7])
          == "You think Obama was pretty good..."
      )
      assert get_true_cased_text(doc3[0]) == "you"
      assert get_true_cased_text(doc3[2]) == "Obama"
      assert get_true_cased_text(doc3[4:6]) == "pretty good"
      words4 = [
          "Ok",
          ",",
          "Barack",
          "Obama",
          "was",
          "pretty",
          "good",
          "...",
      ]
      spaces4 = [False, True, True, True, True, True, False, False]
      pos4 = [
          "INTJ",
          "PUNCT",
          "PROPN",
          "PROPN",
          "VERB",
          "ADV",
          "ADJ",
          "PUNCT",
      ]
      doc4 = get_doc(vocab, words4, spaces4, pos4)
      doc4.ents = [Span(doc4, 2, 4, label="PERSON")]
      assert (
          get_true_cased_text(doc4[0:8])
          == "Ok, Barack Obama was pretty good..."
      )
      assert get_true_cased_text(doc4[2:4]) == "Barack Obama"
      assert get_true_cased_text(doc4[3]) == "Obama"
  
imports: import pytest
  from spacy.tokens import Doc, Span
  from spacy.vocab import Vocab
  from sense2vec.util import get_true_cased_text, make_key, split_key
label_desc: Use image node_id 2 for calling a global function with example usage: test_get_true_cased_text() without return types