docstr: Assert no errors occur during DispersionPlot integration
  with ignore_case parameter turned on
docstr_tok: ["Assert","no","errors","occur","during","DispersionPlot","integration","with","ignore_case","parameter","turned","on"]
code: def test_dispersion_plot_ignore_case(self):
      """
      Assert no errors occur during DispersionPlot integration
      with ignore_case parameter turned on
      """
      text = [doc.split() for doc in corpus.data]
      search_terms = ["Game", "player", "score", "oil", "Man"]
  
      visualizer = DispersionPlot(search_terms, ignore_case=True)
      visualizer.fit(text)
      visualizer.ax.grid(False)
  
      self.assert_images_similar(visualizer, tol=25.5)
  
file_path: yellowbrick/tests/test_text/test_dispersion.py
imports: import pytest
  import matplotlib.pyplot
  from yellowbrick.exceptions import YellowbrickValueError
  from yellowbrick.datasets import load_hobbies
  from yellowbrick.text.dispersion import DispersionPlot, dispersion
  from tests.base import VisualTestCase
label_desc: Use image node_id 3 for calling the TestDispersionPlot obj's underlying member method code with example usage: obj.test_dispersion_plot_ignore_case() without return types