code: def test(audio_format="flac", dtype=None):
      """
      This is a test program designed to avoid a bug in which
      an invalid write/read operation is performed
      on FLAC audio files using soundfile under certain conditions
      when using a specific version of libsndfile.
      """
  
      N = 20
      r = 16000
      if dtype == np.int16:
          ma = np.iinfo(np.int16).max
          mi = np.iinfo(np.int16).min
          a = ma * np.ones(N, dtype=np.int16)
      else:
          ma = np.iinfo(np.int16).max / abs(np.iinfo(np.int16).min)
          mi = -1
          a = ma * np.ones(N)
      mask = np.random.rand(N) > 0.5
      a[mask] = mi
      with tempfile.TemporaryDirectory() as dd:
          f = Path(dd) / f"a.{audio_format}"
          soundfile.write(f, a, r)
          a2, r = soundfile.read(f, dtype=dtype)
      np.testing.assert_equal(a, a2)
  
imports: import tempfile
  from pathlib import Path
  import numpy
  import soundfile
label_desc: Use image node_id 1 for calling a global function with example usage: test(audio_format, dtype) without return types