[issue18919] Unify audio modules tests

[Georg Brandl]

Georg Brandl added the comment:

Some new (I assume) ResourceWarnings from test_wave:

/home/gbr/devel/python/Lib/unittest/case.py:571: ResourceWarning: unclosed file <_io.BufferedWriter name='@test_1974_tmp'>
  testMethod()
/home/gbr/devel/python/Lib/chunk.py:61: ResourceWarning: unclosed file <_io.FileIO name='/home/gbr/devel/python/Lib/test/audiodata/pluck-pcm16.wav' mode='rb'>
  self.chunkname = file.read(4)
/home/gbr/devel/python/Lib/chunk.py:61: ResourceWarning: unclosed file <_io.FileIO name='/home/gbr/devel/python/Lib/test/audiodata/pluck-pcm24.wav' mode='rb'>
  self.chunkname = file.read(4)
/home/gbr/devel/python/Lib/chunk.py:61: ResourceWarning: unclosed file <_io.FileIO name='/home/gbr/devel/python/Lib/test/audiodata/pluck-pcm32.wav' mode='rb'>
  self.chunkname = file.read(4)
/home/gbr/devel/python/Lib/chunk.py:61: ResourceWarning: unclosed file <_io.FileIO name='/home/gbr/devel/python/Lib/test/audiodata/pluck-pcm8.wav' mode='rb'>
  self.chunkname = file.read(4)

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nosy: +georg.brandl

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<http://bugs.python.org/issue18919>
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