docstr: Check if the mel basis is correctly built
docstr_tok: ["Check","if","the","mel","basis","is","correctly","built"]
code: def test_build_mel_basis(self):
      """Check if the mel basis is correctly built"""
      print(" > Testing mel basis building.")
      mel_basis = np_transforms.build_mel_basis(**self.config)
      self.assertEqual(
          mel_basis.shape,
          (self.config.num_mels, self.config.fft_size // 2 + 1),
      )
  
imports: import math
  import os
  import unittest
  from dataclasses import dataclass
  import librosa
  import numpy
  from coqpit import Coqpit
  from tests import get_tests_input_path, get_tests_output_path, get_tests_path
  from TTS.utils.audio import numpy_transforms
label_desc: Use image node_id 2 for calling the TestNumpyTransforms obj's underlying member method code with example usage: obj.test_build_mel_basis() without return types