code: def test_black_white_style():
      """Tests the black white style sets ``plt.rcParams`` with correct values"""
  
      _set_style("black_white")
      assert plt.rcParams["savefig.facecolor"] == "white"
      assert plt.rcParams["figure.facecolor"] == "white"
      assert plt.rcParams["axes.facecolor"] == "white"
      assert plt.rcParams["patch.facecolor"] == "white"
      assert plt.rcParams["patch.edgecolor"] == "black"
      assert plt.rcParams["patch.linewidth"] == 3.0
      assert plt.rcParams["patch.force_edgecolor"]  # = True
      assert plt.rcParams["lines.color"] == "black"
      assert plt.rcParams["text.color"] == "black"
      assert plt.rcParams["path.sketch"] is None
  
file_path: pennylane/tests/drawer/test_style.py
imports: import pytest
  import pennylane
  from pennylane.drawer.style import _set_style
label_desc: Use image node_id 3 for calling a global function with example usage: test_black_white_style() without return types