code: def test_gaussian_noise_snr(self):
      np.random.seed(42)
      samples_in = np.random.normal(0, 1, size=1024).astype(np.float32)
      augmenter = AddGaussianSNR(min_snr_db=15, max_snr_db=35, p=1.0)
      std_in = np.mean(np.abs(samples_in))
      samples_out = augmenter(samples=samples_in, sample_rate=16000)
      std_out = np.mean(np.abs(samples_out))
      assert samples_out.dtype == np.float32
      assert not (float(std_out) == pytest.approx(0.0))
      assert std_out > std_in
  
file_path: audiomentations/tests/test_gaussian_snr.py
imports: import json
  import pytest
  import numpy
  from audiomentations import AddGaussianSNR
label_desc: Use image node_id 2 for calling the TestGaussianSNR obj's underlying member method code with example usage: obj.test_gaussian_noise_snr() without return types