[issue18919] Unify audio modules tests

[Roundup Robot]

Roundup Robot added the comment:

New changeset 3303d735058f by Serhiy Storchaka in branch '2.7':
Issue #18919: If the close() method of a writer in the sunau or wave module
http://hg.python.org/cpython/rev/3303d735058f

New changeset b7eae747385c by Serhiy Storchaka in branch '3.3':
Issue #18919: If the close() method of a writer in the sunau or wave module
http://hg.python.org/cpython/rev/b7eae747385c

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