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from test.support import TESTFN, unlink
import unittest
import pickle
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()
unlink(TESTFN)
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_getparams(self):
self.f = sunau.open(TESTFN, 'w')
self.f.setnchannels(nchannels)
self.f.setsampwidth(sampwidth)
self.f.setframerate(framerate)
self.f.setcomptype('ULAW', '')
output = b'\0' * nframes * nchannels * sampwidth
self.f.writeframes(output)
self.f.close()
self.f = sunau.open(TESTFN, 'rb')
params = self.f.getparams()
self.assertEqual(params.nchannels, nchannels)
self.assertEqual(params.sampwidth, sampwidth)
self.assertEqual(params.framerate, framerate)
self.assertEqual(params.nframes, nframes)
self.assertEqual(params.comptype, 'ULAW')
dump = pickle.dumps(params)
self.assertEqual(pickle.loads(dump), params)
def test_write_context_manager_calls_close(self):
# Close checks for a minimum header and will raise an error
# if it is not set, so this proves that close is called.
with self.assertRaises(sunau.Error):
with sunau.open(TESTFN, 'wb') as f:
pass
with self.assertRaises(sunau.Error):
with open(TESTFN, 'wb') as testfile:
with sunau.open(testfile):
pass
def test_context_manager_with_open_file(self):
with open(TESTFN, 'wb') as testfile:
with sunau.open(testfile) as f:
f.setnchannels(nchannels)
f.setsampwidth(sampwidth)
f.setframerate(framerate)
self.assertFalse(testfile.closed)
with open(TESTFN, 'rb') as testfile:
with sunau.open(testfile) as f:
self.assertFalse(f.getfp().closed)
params = f.getparams()
self.assertEqual(params[0], nchannels)
self.assertEqual(params[1], sampwidth)
self.assertEqual(params[2], framerate)
self.assertIsNone(f.getfp())
self.assertFalse(testfile.closed)
def test_context_manager_with_filename(self):
# If the file doesn't get closed, this test won't fail, but it will
# produce a resource leak warning.
with sunau.open(TESTFN, 'wb') as f:
f.setnchannels(nchannels)
f.setsampwidth(sampwidth)
f.setframerate(framerate)
with sunau.open(TESTFN) as f:
self.assertFalse(f.getfp().closed)
params = f.getparams()
self.assertEqual(params[0], nchannels)
self.assertEqual(params[1], sampwidth)
self.assertEqual(params[2], framerate)
self.assertIsNone(f.getfp())
if __name__ == "__main__":
unittest.main()
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