code: def test_metadata(self):
      d = DocsAndLabelsFromCorpus(self.parsed_corpus)
      metadata = [
          "element 0 0",
          "element 1 0",
          "element 2 0",
          "element 3 0",
          "element 4 1",
          "element 5 1",
          "element 6 1",
          "element 7 1",
          "element 8 1",
          "element 9 2",
      ]
      output = d.get_labels_and_texts_and_meta(metadata)
      self.assertTrue("texts" in output)
      self.assertTrue("labels" in output)
      self.assertTrue("meta" in output)
      self.assertEqual(output["meta"], metadata)
  
file_path: scattertext/scattertext/test/test_docsAndLabelsFromCorpus.py
imports: import json
  from unittest import TestCase
  import numpy
  import pandas
  from scattertext import CorpusFromParsedDocuments
  from scattertext import whitespace_nlp
  from scattertext.CorpusFromPandas import CorpusFromPandas
  from scattertext.DocsAndLabelsFromCorpus import DocsAndLabelsFromCorpus, DocsAndLabelsFromCorpusSample, CorpusShouldBeParsedCorpusException
  from scattertext.test.test_corpusFromPandas import get_docs_categories
  from scattertext.test.test_termDocMatrixFactory import build_hamlet_jz_corpus_with_meta
label_desc: Use image node_id 6 for calling the TestDocsAndLabelsFromCorpus obj's underlying member method code with example usage: obj.test_metadata() without return types