text: from unittest import TestCase
  
  import pandas as pd
  
  from scattertext import OncePerDocFrequencyRanker
  from scattertext.termscoring.ZScores import ZScores
  from scattertext.test.test_termDocMatrixFactory import build_hamlet_jz_corpus, build_hamlet_jz_corpus_with_meta
  
  
  class TestZScores(TestCase):
  	@classmethod
  	def setUpClass(cls):
  		cls.corpus = build_hamlet_jz_corpus()
  
  	def test_get_scores(self):
  		result = ZScores(self.corpus).set_categories('hamlet').get_scores()
  		self.assertEquals(type(result), pd.Series)
  		pd.np.testing.assert_array_equal(pd.np.array(result.index), self.corpus.get_terms())
  
  	def test_get_name(self):
  		self.assertEquals(ZScores(self.corpus).set_categories('hamlet').get_name(), "Z-Score from Welch's T-Test")
  
  	def test_get_ranks_meta(self):
  		corpus = build_hamlet_jz_corpus_with_meta()
  		self.assertEquals(ZScores(corpus)
  						  .set_term_ranker(OncePerDocFrequencyRanker)
  						  .set_categories('hamlet').get_name(), "Z-Score from Welch's T-Test")
  