docstr: Tests that the shape exception is raised.
docstr_tok: ["Tests","that","the","shape","exception","is","raised","."]
code: def test_brdf_shape_exception_raised(self, error_msg, *shape):
      """Tests that the shape exception is raised."""
      self.assert_exception_is_raised(phong.brdf, error_msg, shape)
  
file_path: graphics/tensorflow_graphics/rendering/reflectance/tests/phong_test.py
imports: import math
  import sys
  from absl.testing import flagsaver
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow_graphics.rendering.reflectance import phong
  from tensorflow_graphics.util import test_case
label_desc: Use image node_id 6 for calling the PhongTest obj's underlying member method code with example usage: obj.test_brdf_shape_exception_raised(error_msg) without return types