def _test_writer_netascii_mode(self, data):
fname = get_random_filename()
fw = TftpFileWriter(fname, 'netascii')
write_whole_file(fw, data)
self.assertTrue(fw._file.closed)
with open(fname, mode='rb') as f:
_buffer = f.read()
self.assertEqual(_buffer, netascii.decode(data))
def _test_write_to_closed_file(self, mode):
"""
When trying to write to a closed file, a TftpIOError should be raised.
"""
fname = get_random_filename()
fw = TftpFileWriter(fname, mode)
if mode == 'netascii':
write_whole_file(fw, netascii.decode(LOREM_IPSUM))
elif mode == 'octet':
write_whole_file(fw, LOREM_IPSUM)
self.assertTrue(fw._file.closed)
with self.assertRaises(TftpIOError):
fw.write_next_block('data'.encode())
