code: def test_requires_coding_rank_greater_equal_zero(self):
      with self.assertRaises(ValueError):
          PowerLawEntropyModel(coding_rank=-1)
  
file_path: compression/tensorflow_compression/python/entropy_models/power_law_test.py
imports: import numpy
  import tensorflow
  from tensorflow_compression.python.entropy_models.power_law import PowerLawEntropyModel
label_desc: Use image node_id 2 for calling the PowerLawEntropyModelTest obj's underlying member method code with example usage: obj.test_requires_coding_rank_greater_equal_zero() without return types