code: def testMixInAudioSample(self):
      track_data = np.zeros([10000])
      sample_data = np.ones([1000])
      generate_streaming_test_wav.mix_in_audio_sample(
          track_data, 2000, sample_data, 0, 1000, 1.0, 100, 100
      )
      self.assertNear(1.0, track_data[2500], 0.0001)
      self.assertNear(0.0, track_data[3500], 0.0001)
  
imports: import numpy
  from tensorflow.examples.speech_commands import generate_streaming_test_wav
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the GenerateStreamingTestWavTest obj's underlying member method code with example usage: obj.testMixInAudioSample() without return types