text: from test.test_support import findfile, run_unittest, TESTFN, impl_detail
  import unittest
  import os
  import io
  
  import aifc
  
  
  class AIFCTest(unittest.TestCase):
  
      def setUp(self):
          self.f = self.fout = None
          self.sndfilepath = findfile('Sine-1000Hz-300ms.aif')
  
      def tearDown(self):
          if self.f is not None:
              self.f.close()
          if self.fout is not None:
              try:
                  self.fout.close()
              except (aifc.Error, AttributeError):
                  pass
          try:
              os.remove(TESTFN)
          except OSError:
              pass
  
      def test_skipunknown(self):
          #Issue 2245
          #This file contains chunk types aifc doesn't recognize.
          self.f = aifc.open(self.sndfilepath)
  
      def test_params(self):
          f = self.f = aifc.open(self.sndfilepath)
          self.assertEqual(f.getnchannels(), 2)
          self.assertEqual(f.getsampwidth(), 2)
          self.assertEqual(f.getframerate(), 48000)
          self.assertEqual(f.getnframes(), 14400)
          self.assertEqual(f.getcomptype(), 'NONE')
          self.assertEqual(f.getcompname(), 'not compressed')
          self.assertEqual(f.getparams(), (2, 2, 48000, 14400, 'NONE', 'not compressed'))
  
      def test_read(self):
          f = self.f = aifc.open(self.sndfilepath)
          self.assertEqual(f.tell(), 0)
          self.assertEqual(f.readframes(2), '\x00\x00\x00\x00\x0b\xd4\x0b\xd4')
          f.rewind()
          pos0 = f.tell()
          self.assertEqual(pos0, 0)
          self.assertEqual(f.readframes(2), '\x00\x00\x00\x00\x0b\xd4\x0b\xd4')
          pos2 = f.tell()
          self.assertEqual(pos2, 2)
          self.assertEqual(f.readframes(2), '\x17t\x17t"\xad"\xad')
          f.setpos(pos2)
          self.assertEqual(f.readframes(2), '\x17t\x17t"\xad"\xad')
          f.setpos(pos0)
          self.assertEqual(f.readframes(2), '\x00\x00\x00\x00\x0b\xd4\x0b\xd4')
  
      def test_write(self):
          f = self.f = aifc.open(self.sndfilepath)
          fout = self.fout = aifc.open(TESTFN, 'wb')
          fout.aifc()
          fout.setparams(f.getparams())
          for frame in range(f.getnframes()):
              fout.writeframes(f.readframes(1))
          fout.close()
          fout = self.fout = aifc.open(TESTFN, 'rb')
          f.rewind()
          self.assertEqual(f.getparams(), fout.getparams())
          self.assertEqual(f.readframes(5), fout.readframes(5))
  
      @impl_detail("PyPy has no audioop module yet", pypy=False)
      def test_compress(self):
          f = self.f = aifc.open(self.sndfilepath)
          fout = self.fout = aifc.open(TESTFN, 'wb')
          fout.aifc()
          fout.setnchannels(f.getnchannels())
          fout.setsampwidth(f.getsampwidth())
          fout.setframerate(f.getframerate())
          fout.setcomptype('ULAW', 'foo')
          for frame in range(f.getnframes()):
              fout.writeframes(f.readframes(1))
          fout.close()
          self.assertLess(
              os.stat(TESTFN).st_size,
              os.stat(self.sndfilepath).st_size*0.75,
              )
          fout = self.fout = aifc.open(TESTFN, 'rb')
          f.rewind()
          self.assertEqual(f.getparams()[0:3], fout.getparams()[0:3])
          self.assertEqual(fout.getcomptype(), 'ULAW')
          self.assertEqual(fout.getcompname(), 'foo')
          # XXX: this test fails, not sure if it should succeed or not
          # self.assertEqual(f.readframes(5), fout.readframes(5))
  
      def test_close(self):
          class Wrapfile(object):
              def __init__(self, file):
                  self.file = open(file, 'rb')
                  self.closed = False
              def close(self):
                  self.file.close()
                  self.closed = True
              def __getattr__(self, attr): return getattr(self.file, attr)
          testfile = Wrapfile(self.sndfilepath)
          f = self.f = aifc.open(testfile)
          self.assertEqual(testfile.closed, False)
          f.close()
          self.assertEqual(testfile.closed, True)
  
  
  class AIFCLowLevelTest(unittest.TestCase):
  
      def test_read_written(self):
          def read_written(self, what):
              f = io.BytesIO()
              getattr(aifc, '_write_' + what)(f, x)
              f.seek(0)
              return getattr(aifc, '_read_' + what)(f)
          for x in (-1, 0, 0.1, 1):
              self.assertEqual(read_written(x, 'float'), x)
          for x in (float('NaN'), float('Inf')):
              self.assertEqual(read_written(x, 'float'), aifc._HUGE_VAL)
          for x in (b'', b'foo', b'a' * 255):
              self.assertEqual(read_written(x, 'string'), x)
          for x in (-0x7FFFFFFF, -1, 0, 1, 0x7FFFFFFF):
              self.assertEqual(read_written(x, 'long'), x)
          for x in (0, 1, 0xFFFFFFFF):
              self.assertEqual(read_written(x, 'ulong'), x)
          for x in (-0x7FFF, -1, 0, 1, 0x7FFF):
              self.assertEqual(read_written(x, 'short'), x)
          for x in (0, 1, 0xFFFF):
              self.assertEqual(read_written(x, 'ushort'), x)
  
      def test_read_raises(self):
          f = io.BytesIO(b'\x00')
          self.assertRaises(EOFError, aifc._read_ulong, f)
          self.assertRaises(EOFError, aifc._read_long, f)
          self.assertRaises(EOFError, aifc._read_ushort, f)
          self.assertRaises(EOFError, aifc._read_short, f)
  
      def test_write_long_string_raises(self):
          f = io.BytesIO()
          with self.assertRaises(ValueError):
              aifc._write_string(f, b'too long' * 255)
  
  
  def test_main():
      run_unittest(AIFCTest)
      run_unittest(AIFCLowLevelTest)
  
  
  if __name__ == "__main__":
      unittest.main()
  