class_docstr: Test settings class
class_docstr_tok: ["Test","settings","class"]
code: def test_invalidBGColorRGB(self):
      with self.assertRaises(ValueError):
          convert.ImageConvertSettings(
              "png", 10, 10, bg_color_rgb=(-1, 500, 255)
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from absl.testing import absltest
  from PIL import Image
  from PIL import ImageColor
  import convert
label_desc: Use image node_id 6 for calling the ImageConvertSettingsTests obj's underlying member method code with example usage: obj.test_invalidBGColorRGB() without return types