docstr: Assert that an error is raised when no words are provided.
docstr_tok: ["Assert","that","an","error","is","raised","when","no","words","are","provided","."]
code: def test_word_correlation_no_words(self):
      """
      Assert that an error is raised when no words are provided.
      """
      with pytest.raises(YellowbrickValueError):
          WordCorrelationPlot([])
  
      with pytest.raises(YellowbrickValueError):
          WordCorrelationPlot([""])
  
      with pytest.raises(YellowbrickValueError):
          WordCorrelationPlot([" ", "\t", "\n"])
  
file_path: yellowbrick/tests/test_text/test_correlation.py
imports: import pytest
  import matplotlib.pyplot
  from tests.base import VisualTestCase
  from yellowbrick.datasets import load_hobbies
  from yellowbrick.exceptions import YellowbrickValueError
  from yellowbrick.text.correlation import WordCorrelationPlot, word_correlation
label_desc: Use image node_id 6 for calling the TestWordCorrelationPlot obj's underlying member method code with example usage: obj.test_word_correlation_no_words() without return types