code: def test_gaussian_noise(self):
      samples = np.zeros((20,), dtype=np.float32)
      sample_rate = 16000
      augmenter = Compose([AddGaussianNoise(p=1.0)])
      samples = augmenter(samples=samples, sample_rate=sample_rate)
  
      assert samples.dtype == np.float32
      assert not (float(np.sum(np.abs(samples))) == pytest.approx(0.0))
  
imports: import numpy
  import pytest
  from audiomentations import AddGaussianNoise, Compose
label_desc: Use image node_id 1 for calling the TestGaussianNoise obj's underlying member method code with example usage: obj.test_gaussian_noise() without return types