class_docstr: Test various keywords arguments that can be passed to modify graphic.
class_docstr_tok: ["Test","various","keywords","arguments","that","can","be","passed","to","modify","graphic","."]
docstr: Test that if no style is specified, the black_white style is the default for mpl_draw,
  rather than general matplotlib settings.
docstr_tok: ["Test","that","if","no","style","is","specified",",","the","black_white","style","is","the","default","for","mpl_draw",",","rather","than","general","matplotlib","settings","."]
code: def test_black_white_is_default_style(self):
      """Test that if no style is specified, the black_white style is the default for mpl_draw,
      rather than general matplotlib settings."""
  
      _, ax = qml.draw_mpl(circuit1)(1.234, 1.234)
  
      assert ax.get_facecolor() == (1.0, 1.0, 1.0, 1.0)
      assert ax.patches[4].get_facecolor() == (1.0, 1.0, 1.0, 1.0)
      assert ax.patches[4].get_edgecolor() == (0.0, 0.0, 0.0, 1.0)
  
imports: import pytest
  import pennylane
label_desc: Use image node_id 5 for calling the TestKwargs obj's underlying member method code with example usage: obj.test_black_white_is_default_style() without return types