Issue #5202: Added support for unseekable files in the wave module.
diff --git a/Lib/test/audiotests.py b/Lib/test/audiotests.py
index 7b39269..c22f0a1 100644
--- a/Lib/test/audiotests.py
+++ b/Lib/test/audiotests.py
@@ -21,6 +21,13 @@
a.byteswap()
return a.tobytes()
+class UnseekableIO(io.FileIO):
+ def tell(self):
+ raise io.UnsupportedOperation
+
+ def seek(self, *args, **kwargs):
+ raise io.UnsupportedOperation
+
class AudioTests:
close_fd = False
@@ -177,6 +184,59 @@
self.assertEqual(testfile.read(13), b'ababagalamaga')
self.check_file(testfile, self.nframes, self.frames)
+ def test_unseekable_read(self):
+ with self.create_file(TESTFN) as f:
+ f.setnframes(self.nframes)
+ f.writeframes(self.frames)
+
+ with UnseekableIO(TESTFN, 'rb') as testfile:
+ self.check_file(testfile, self.nframes, self.frames)
+
+ def test_unseekable_write(self):
+ with UnseekableIO(TESTFN, 'wb') as testfile:
+ with self.create_file(testfile) as f:
+ f.setnframes(self.nframes)
+ f.writeframes(self.frames)
+
+ self.check_file(TESTFN, self.nframes, self.frames)
+
+ def test_unseekable_incompleted_write(self):
+ with UnseekableIO(TESTFN, 'wb') as testfile:
+ testfile.write(b'ababagalamaga')
+ f = self.create_file(testfile)
+ f.setnframes(self.nframes + 1)
+ try:
+ f.writeframes(self.frames)
+ except OSError:
+ pass
+ try:
+ f.close()
+ except OSError:
+ pass
+
+ with open(TESTFN, 'rb') as testfile:
+ self.assertEqual(testfile.read(13), b'ababagalamaga')
+ self.check_file(testfile, self.nframes + 1, self.frames)
+
+ def test_unseekable_overflowed_write(self):
+ with UnseekableIO(TESTFN, 'wb') as testfile:
+ testfile.write(b'ababagalamaga')
+ f = self.create_file(testfile)
+ f.setnframes(self.nframes - 1)
+ try:
+ f.writeframes(self.frames)
+ except OSError:
+ pass
+ try:
+ f.close()
+ except OSError:
+ pass
+
+ with open(TESTFN, 'rb') as testfile:
+ self.assertEqual(testfile.read(13), b'ababagalamaga')
+ framesize = self.nchannels * self.sampwidth
+ self.check_file(testfile, self.nframes - 1, self.frames[:-framesize])
+
class AudioTestsWithSourceFile(AudioTests):
diff --git a/Lib/test/test_aifc.py b/Lib/test/test_aifc.py
index 3e9a1d1..b4270bc 100644
--- a/Lib/test/test_aifc.py
+++ b/Lib/test/test_aifc.py
@@ -8,10 +8,17 @@
import aifc
-class AifcPCM8Test(audiotests.AudioWriteTests,
- audiotests.AudioTestsWithSourceFile,
- unittest.TestCase):
+class AifcTest(audiotests.AudioWriteTests,
+ audiotests.AudioTestsWithSourceFile):
module = aifc
+ close_fd = True
+ test_unseekable_read = None
+ test_unseekable_write = None
+ test_unseekable_incompleted_write = None
+ test_unseekable_overflowed_write = None
+
+
+class AifcPCM8Test(AifcTest, unittest.TestCase):
sndfilename = 'pluck-pcm8.aiff'
sndfilenframes = 3307
nchannels = 2
@@ -26,13 +33,9 @@
11FA 3EFB BCFC 66FF CF04 4309 C10E 5112 EE17 8216 7F14 8012 \
490E 520D EF0F CE0F E40C 630A 080A 2B0B 510E 8B11 B60E 440A \
""")
- close_fd = True
-class AifcPCM16Test(audiotests.AudioWriteTests,
- audiotests.AudioTestsWithSourceFile,
- unittest.TestCase):
- module = aifc
+class AifcPCM16Test(AifcTest, unittest.TestCase):
sndfilename = 'pluck-pcm16.aiff'
sndfilenframes = 3307
nchannels = 2
@@ -49,13 +52,9 @@
EEE21753 82071665 7FFF1443 8004128F 49A20EAF 52BB0DBA EFB40F60 CE3C0FBF \
E4B30CEC 63430A5C 08C80A20 2BBB0B08 514A0E43 8BCF1139 B6F60EEB 44120A5E \
""")
- close_fd = True
-class AifcPCM24Test(audiotests.AudioWriteTests,
- audiotests.AudioTestsWithSourceFile,
- unittest.TestCase):
- module = aifc
+class AifcPCM24Test(AifcTest, unittest.TestCase):
sndfilename = 'pluck-pcm24.aiff'
sndfilenframes = 3307
nchannels = 2
@@ -78,13 +77,9 @@
E4B49C0CEA2D 6344A80A5A7C 08C8FE0A1FFE 2BB9860B0A0E \
51486F0E44E1 8BCC64113B05 B6F4EC0EEB36 4413170A5B48 \
""")
- close_fd = True
-class AifcPCM32Test(audiotests.AudioWriteTests,
- audiotests.AudioTestsWithSourceFile,
- unittest.TestCase):
- module = aifc
+class AifcPCM32Test(AifcTest, unittest.TestCase):
sndfilename = 'pluck-pcm32.aiff'
sndfilenframes = 3307
nchannels = 2
@@ -107,13 +102,9 @@
E4B49CC00CEA2D90 6344A8800A5A7CA0 08C8FE800A1FFEE0 2BB986C00B0A0E00 \
51486F800E44E190 8BCC6480113B0580 B6F4EC000EEB3630 441317800A5B48A0 \
""")
- close_fd = True
-class AifcULAWTest(audiotests.AudioWriteTests,
- audiotests.AudioTestsWithSourceFile,
- unittest.TestCase):
- module = aifc
+class AifcULAWTest(AifcTest, unittest.TestCase):
sndfilename = 'pluck-ulaw.aifc'
sndfilenframes = 3307
nchannels = 2
@@ -132,13 +123,9 @@
""")
if sys.byteorder != 'big':
frames = audiotests.byteswap2(frames)
- close_fd = True
-class AifcALAWTest(audiotests.AudioWriteTests,
- audiotests.AudioTestsWithSourceFile,
- unittest.TestCase):
- module = aifc
+class AifcALAWTest(AifcTest, unittest.TestCase):
sndfilename = 'pluck-alaw.aifc'
sndfilenframes = 3307
nchannels = 2
@@ -157,7 +144,6 @@
""")
if sys.byteorder != 'big':
frames = audiotests.byteswap2(frames)
- close_fd = True
class AifcMiscTest(audiotests.AudioTests, unittest.TestCase):
diff --git a/Lib/wave.py b/Lib/wave.py
index e723423..3d01817 100644
--- a/Lib/wave.py
+++ b/Lib/wave.py
@@ -491,14 +491,18 @@
if not self._nframes:
self._nframes = initlength // (self._nchannels * self._sampwidth)
self._datalength = self._nframes * self._nchannels * self._sampwidth
- self._form_length_pos = self._file.tell()
+ try:
+ self._form_length_pos = self._file.tell()
+ except (AttributeError, OSError):
+ self._form_length_pos = None
self._file.write(struct.pack('<L4s4sLHHLLHH4s',
36 + self._datalength, b'WAVE', b'fmt ', 16,
WAVE_FORMAT_PCM, self._nchannels, self._framerate,
self._nchannels * self._framerate * self._sampwidth,
self._nchannels * self._sampwidth,
self._sampwidth * 8, b'data'))
- self._data_length_pos = self._file.tell()
+ if self._form_length_pos is not None:
+ self._data_length_pos = self._file.tell()
self._file.write(struct.pack('<L', self._datalength))
self._headerwritten = True