def test_prefer_lz4_compression(self, *args):
c = self.make_connection()
c._requests = {
0: (c._handle_options_response, ProtocolHandler.decode_message, [])
}
c.defunct = Mock()
c.cql_version = "3.0.3"
locally_supported_compressions.pop('lz4', None)
locally_supported_compressions.pop('snappy', None)
locally_supported_compressions['lz4'] = ('lz4compress',
'lz4decompress')
locally_supported_compressions['snappy'] = ('snappycompress',
'snappydecompress')
# read in a SupportedMessage response
options_buf = BytesIO()
write_stringmultimap(options_buf, {
'CQL_VERSION': ['3.0.3'],
'COMPRESSION': ['snappy', 'lz4']
})
options = options_buf.getvalue()
c.process_msg(
_Frame(version=4,
flags=0,
stream=0,
opcode=SupportedMessage.opcode,
body_offset=9,
end_pos=9 + len(options)), options)
self.assertEqual(c.decompressor,
locally_supported_compressions['lz4'][1])
def test_disable_compression(self, *args):
c = self.make_connection()
c._requests = {
0: (c._handle_options_response, ProtocolHandler.decode_message)
}
c.defunct = Mock()
# disable compression
c.compression = False
locally_supported_compressions.pop('lz4', None)
locally_supported_compressions.pop('snappy', None)
locally_supported_compressions['lz4'] = ('lz4compress',
'lz4decompress')
locally_supported_compressions['snappy'] = ('snappycompress',
'snappydecompress')
# read in a SupportedMessage response
header = self.make_header_prefix(SupportedMessage)
# the server only supports snappy
options_buf = BytesIO()
write_stringmultimap(options_buf, {
'CQL_VERSION': ['3.0.3'],
'COMPRESSION': ['snappy', 'lz4']
})
options = options_buf.getvalue()
message = self.make_msg(header, options)
c.process_msg(message, len(message) - 8)
self.assertEqual(c.decompressor, None)
def test_requested_compression_not_available(self, *args):
c = self.make_connection()
c._requests = {0: (c._handle_options_response, ProtocolHandler.decode_message, [])}
c.defunct = Mock()
# request lz4 compression
c.compression = "lz4"
locally_supported_compressions.pop('lz4', None)
locally_supported_compressions.pop('snappy', None)
locally_supported_compressions['lz4'] = ('lz4compress', 'lz4decompress')
locally_supported_compressions['snappy'] = ('snappycompress', 'snappydecompress')
# read in a SupportedMessage response
header = self.make_header_prefix(SupportedMessage)
# the server only supports snappy
options_buf = BytesIO()
write_stringmultimap(options_buf, {
'CQL_VERSION': ['3.0.3'],
'COMPRESSION': ['snappy']
})
options = options_buf.getvalue()
c.process_msg(_Frame(version=4, flags=0, stream=0, opcode=SupportedMessage.opcode, body_offset=9, end_pos=9 + len(options)), options)
# make sure it errored correctly
c.defunct.assert_called_once_with(ANY)
args, kwargs = c.defunct.call_args
self.assertIsInstance(args[0], ProtocolError)