def test_normal_constant_string():
constant_value = struct.unpack('<d', b'helloAAA')[0]
cdc = codec.ConstantString('column',
constant_value,
constant_value,
DataType.STRING,
has_missing=False)
encoded = b''
_check_decode(cdc, encoded, 'helloAAA')
def test_null_terminated_constant_string():
"""
This tests the (somewhat dubious) 'missing' values in some (older) data
encoded from ODB-1 using the migrator. This data uses the integer missing value,
casted to a double, that happens to start with \x00 --> "NULL STRING"
We need to support decoding this data...
"""
constant_value = struct.unpack('<d', b'\x00\x00\xc0\xff\xff\xff\xdfA')[0]
cdc = codec.ConstantString('column',
constant_value,
constant_value,
DataType.STRING,
has_missing=False)
encoded = b''
_check_decode(cdc, encoded, '')