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from test.support import run_unittest, TESTFN
import unittest
import os
import sunau
nchannels = 2
sampwidth = 2
framerate = 8000
nframes = 100
class SunAUTest(unittest.TestCase):
def setUp(self):
self.f = None
def tearDown(self):
if self.f is not None:
self.f.close()
try:
os.remove(TESTFN)
except OSError:
pass
def test_lin(self):
self.f = sunau.open(TESTFN, 'w')
self.f.setnchannels(nchannels)
self.f.setsampwidth(sampwidth)
self.f.setframerate(framerate)
self.f.setcomptype('NONE', 'not compressed')
output = b'\xff\x00\x12\xcc' * (nframes * nchannels * sampwidth // 4)
self.f.writeframes(output)
self.f.close()
self.f = sunau.open(TESTFN, 'rb')
self.assertEqual(nchannels, self.f.getnchannels())
self.assertEqual(sampwidth, self.f.getsampwidth())
self.assertEqual(framerate, self.f.getframerate())
self.assertEqual(nframes, self.f.getnframes())
self.assertEqual('NONE', self.f.getcomptype())
self.assertEqual(self.f.readframes(nframes), output)
self.f.close()
def test_ulaw(self):
self.f = sunau.open(TESTFN, 'w')
self.f.setnchannels(nchannels)
self.f.setsampwidth(sampwidth)
self.f.setframerate(framerate)
self.f.setcomptype('ULAW', '')
# u-law compression is lossy, therefore we can't expect non-zero data
# to come back unchanged.
output = b'\0' * nframes * nchannels * sampwidth
self.f.writeframes(output)
self.f.close()
self.f = sunau.open(TESTFN, 'rb')
self.assertEqual(nchannels, self.f.getnchannels())
self.assertEqual(sampwidth, self.f.getsampwidth())
self.assertEqual(framerate, self.f.getframerate())
self.assertEqual(nframes, self.f.getnframes())
self.assertEqual('ULAW', self.f.getcomptype())
self.assertEqual(self.f.readframes(nframes), output)
self.f.close()
def test_main():
run_unittest(SunAUTest)
if __name__ == "__main__":
unittest.main()
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