def test_short_03_syncsafe(self):
testval = bytearray((82,82,85,90,45,255,224,100))
testval2 = bytearray((82,82,85,90,45,255,24,100))
testval3 = bytearray((82,82,85,90,255,0,119))
testval4 = bytearray((70,71,72,255,255,73,74,255,0,75))
compareval = bytearray((82,82,85,90,45,255,0,224,100))
compareval3 = bytearray((82,82,85,90,255,0,0,119))
compareval4 = bytearray((70,71,72,255,0,255,73,74,255,0,0,75))
self.assertEqual(compareval, id3v2common.syncsafe_data(testval), "Does't syncsafe data with false sync")
self.assertEqual(testval, id3v2common.un_syncsafe_data(compareval), "failed to unsync data with false sync")
self.assertEqual(testval2, id3v2common.syncsafe_data(testval2), "mangled data without sync bit")
self.assertEqual(compareval3, id3v2common.syncsafe_data(testval3), "Didn't syncsafe zeros as required")
self.assertEqual(testval3, id3v2common.un_syncsafe_data(compareval3), "Didn't unsyncsafe zeros as required")
self.assertEqual(compareval4, id3v2common.syncsafe_data(testval4), "Didn't handle multiple bytes needing syncsafing")
self.assertEqual(testval4, id3v2common.un_syncsafe_data(compareval4), "Didn't handle multiple bytes needing un-syncsafing")
def _data_bytes(self):
"""Takes byte-ified data, and applies any transformations that are
needed for storage."""
data = bytes(self.data)
if self.version == 4 and self.unsync_flag: #this is only supported v4
data = bytes(id3v2common.syncsafe_data(data))
if self.version >= 3 and self.compressed_flag:
data = bytes(zlib.compress(data))
if self.version >= 4 and self.encrypted_flag:
raise ValueError("not yet supported") #TODO implement
return data
