code: def test_build_fixed_effects(
      self, nticks, seasonal_structure, covariates, expected_num_effects
  ):
      effects = seasonality_util.build_fixed_effects(
          nticks, seasonal_structure, covariates
      )
      self.assertEqual(effects.shape, (nticks, expected_num_effects))
  
file_path: probability/tensorflow_probability/python/sts/internal/seasonality_util_test.py
imports: from absl.testing import parameterized
  import numpy
  import pandas
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.sts.internal import seasonality_util
label_desc: Use image node_id 3 for calling the SeasonalityUtilsTest obj's underlying member method code with example usage: obj.test_build_fixed_effects(nticks, seasonal_structure, covariates, expected_num_effects) without return types