Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_wave.py @ 79691:05c8928362ee

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Merge __next__ method link fixes with 3.3.
author Ezio Melotti <ezio.melotti@gmail.com>
date Fri, 12 Oct 2012 13:46:37 +0300
parents 5dc06a059630
children ee7563b07c6f 340a12c18b7f
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1 from test.support import TESTFN, run_unittest
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2 import os
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3 import wave
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4 import struct
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5 import unittest
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6
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7 nchannels = 2
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8 sampwidth = 2
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9 framerate = 8000
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10 nframes = 100
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11
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12 class TestWave(unittest.TestCase):
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13
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14 def setUp(self):
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15 self.f = None
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16
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17 def tearDown(self):
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18 if self.f is not None:
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19 self.f.close()
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20 try:
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21 os.remove(TESTFN)
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22 except OSError:
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23 pass
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24
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25 def test_it(self, test_rounding=False):
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26 self.f = wave.open(TESTFN, 'wb')
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27 self.f.setnchannels(nchannels)
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28 self.f.setsampwidth(sampwidth)
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29 if test_rounding:
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30 self.f.setframerate(framerate - 0.1)
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31 else:
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32 self.f.setframerate(framerate)
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33 self.f.setnframes(nframes)
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34 output = b'\0' * nframes * nchannels * sampwidth
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35 self.f.writeframes(output)
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36 self.f.close()
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37
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38 self.f = wave.open(TESTFN, 'rb')
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39 self.assertEqual(nchannels, self.f.getnchannels())
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40 self.assertEqual(sampwidth, self.f.getsampwidth())
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41 self.assertEqual(framerate, self.f.getframerate())
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42 self.assertEqual(nframes, self.f.getnframes())
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43 self.assertEqual(self.f.readframes(nframes), output)
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44
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45 def test_fractional_framerate(self):
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46 """
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47 Addresses [ 1512791 ] module wave does no rounding
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48 Floating point framerates should be rounded, rather than truncated.
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49 """
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50 self.test_it(test_rounding=True)
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51
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52 def test_issue7681(self):
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53 self.f = wave.open(TESTFN, 'wb')
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54 self.f.setnchannels(nchannels)
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55 self.f.setsampwidth(sampwidth)
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56 self.f.setframerate(framerate)
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57 # Don't call setnframes, make _write_header divide to figure it out
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58 output = b'\0' * nframes * nchannels * sampwidth
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59 self.f.writeframes(output)
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60
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61
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62 def test_main():
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63 run_unittest(TestWave)
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64
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65 if __name__ == '__main__':
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66 test_main()