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from dataclasses import dataclass
import pytest
from typing_extensions import Literal
from mashumaro import DataClassDictMixin
from mashumaro.config import ADD_DIALECT_SUPPORT, BaseConfig
from mashumaro.dialect import Dialect
from mashumaro.exceptions import InvalidFieldValue
from mashumaro.helper import pass_through
from tests.entities import MyEnum
def test_literal_with_str():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal["1", "2", "3"]
assert DataClass.from_dict({"x": "1"}) == DataClass("1")
assert DataClass.from_dict({"x": "2"}) == DataClass("2")
assert DataClass("1").to_dict() == {"x": "1"}
assert DataClass("2").to_dict() == {"x": "2"}
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": 1})
with pytest.raises(InvalidFieldValue):
DataClass(1).to_dict()
def test_literal_with_int():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal[1, 2]
assert DataClass.from_dict({"x": 1}) == DataClass(1)
assert DataClass.from_dict({"x": 2}) == DataClass(2)
assert DataClass(1).to_dict() == {"x": 1}
assert DataClass(2).to_dict() == {"x": 2}
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": "1"})
with pytest.raises(InvalidFieldValue):
DataClass("1").to_dict()
def test_literal_with_bool():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal[True, False]
assert DataClass.from_dict({"x": True}) == DataClass(True)
assert DataClass.from_dict({"x": False}) == DataClass(False)
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": "a"})
with pytest.raises(InvalidFieldValue):
DataClass("a").to_dict()
def test_literal_with_none():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal[None]
assert DataClass.from_dict({"x": None}) == DataClass(None)
assert DataClass(None).to_dict() == {"x": None}
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": "1"})
with pytest.raises(InvalidFieldValue):
DataClass("1").to_dict()
def test_literal_with_bytes():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal[b"\x00"]
assert DataClass.from_dict({"x": "AA==\n"}) == DataClass(b"\x00")
assert DataClass(b"\x00").to_dict() == {"x": "AA==\n"}
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": "\x00"})
with pytest.raises(InvalidFieldValue):
DataClass("AA==\n").to_dict()
def test_literal_with_bytes_overridden():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal[b"\x00"]
class Config(BaseConfig):
serialization_strategy = {bytes: pass_through}
assert DataClass.from_dict({"x": b"\x00"}) == DataClass(b"\x00")
assert DataClass(b"\x00").to_dict() == {"x": b"\x00"}
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": "AA==\n"})
def test_literal_with_enum():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal[MyEnum.a]
assert DataClass.from_dict({"x": "letter a"}) == DataClass(MyEnum.a)
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": "letter b"})
with pytest.raises(InvalidFieldValue):
DataClass(MyEnum.b).to_dict()
def test_literal_with_dialect():
@dataclass
class DataClass(DataClassDictMixin):
x: Literal[b"\x00"]
class Config(BaseConfig):
code_generation_options = [ADD_DIALECT_SUPPORT]
class MyDialect(Dialect):
serialization_strategy = {bytes: pass_through}
instance = DataClass(b"\x00")
assert DataClass.from_dict({"x": b"\x00"}, dialect=MyDialect) == instance
assert instance.to_dict(dialect=MyDialect) == {"x": b"\x00"}
with pytest.raises(InvalidFieldValue):
DataClass.from_dict({"x": "AA==\n"}, dialect=MyDialect)
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