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from collections import deque
from dataclasses import dataclass, field
from enum import Enum
from typing import (
AbstractSet,
Any,
FrozenSet,
List,
Literal,
Mapping,
Optional,
Sequence,
Set,
Tuple,
Union,
)
from uuid import UUID, uuid4
import pytest
from apischema import schema
from apischema.deserialization import deserialize
from apischema.fields import with_fields_set
from apischema.metadata import properties
from apischema.serialization import serialize
from apischema.validation.errors import ValidationError
uuid = str(uuid4())
def bijection(cls, data, expected):
obj = deserialize(cls, data)
assert obj == expected
assert type(obj) is type(expected)
assert serialize(cls, obj) == data
def error(data, cls):
with pytest.raises(ValidationError):
deserialize(cls, data)
@dataclass(unsafe_hash=True)
class SimpleDataclass:
a: int
class SimpleEnum(Enum):
a = "a"
@with_fields_set
@dataclass
class Dataclass:
nested: SimpleDataclass
opt: Optional[int] = field(default=None, metadata=schema(min=100))
def test_bool_as_int_error():
error(True, int)
@pytest.mark.parametrize("data", ["", 0])
def test_any(data):
bijection(Any, data, data)
@pytest.mark.parametrize(
"data, expected", [(None, None), ({"a": 0}, SimpleDataclass(0))]
)
def test_optional(data, expected):
bijection(Optional[SimpleDataclass], data, expected)
def test_optional_error():
error(0, Optional[str])
@pytest.mark.parametrize("data, expected", [("", ""), ({"a": 0}, SimpleDataclass(0))])
def test_union(data, expected):
bijection(Union[str, SimpleDataclass], data, expected)
@pytest.mark.parametrize("data", [0, None])
def test_union_error(data):
error(data, Union[str, SimpleDataclass])
@pytest.mark.parametrize("cls, data", [(int, 0), (str, ""), (bool, True), (float, 0.0)])
def test_primitive(cls, data):
bijection(cls, data, data)
@pytest.mark.parametrize("data", ["", None])
def test_primitive_error(data):
error(data, int)
# noinspection PyTypeChecker
@pytest.mark.parametrize(
"cls, expected",
[
(List, [0, SimpleDataclass(0)]),
(Set, {0, SimpleDataclass(0)}),
(Sequence, [0, SimpleDataclass(0)]),
(AbstractSet, {0, SimpleDataclass(0)}),
(FrozenSet, frozenset([0, SimpleDataclass(0)])),
],
)
def test_collection(cls, expected):
data = [0, {"a": 0}]
bijection(cls[Union[int, SimpleDataclass]], data, expected)
def test_collection_tuple():
data = [0, {"a": 0}]
expected = (0, SimpleDataclass(0))
bijection(Tuple[2 * (Union[int, SimpleDataclass],)], data, expected)
def test_collection_tuple_variadic():
data = [0, {"a": 0}]
expected = (0, SimpleDataclass(0))
bijection(Tuple[Union[int, SimpleDataclass], ...], data, expected)
@pytest.mark.parametrize("data", [{}, ["", 0]])
def test_iterable_error(data):
error(data, List[str])
@pytest.mark.parametrize(
"key_cls, data, expected",
[
(str, {"int": 0, "SC": {"a": 0}}, {"int": 0, "SC": SimpleDataclass(0)}),
(UUID, {uuid: 0}, {UUID(uuid): 0}),
(UUID, {uuid: 0}, {UUID(uuid): 0}),
],
)
def test_mapping(key_cls, data, expected):
bijection(Mapping[key_cls, Union[int, SimpleDataclass]], data, expected) # type: ignore
@pytest.mark.parametrize("data", [[], {"key": ""}])
def test_mapping_error(data):
error(data, Mapping[str, int])
@pytest.mark.parametrize("expected", [UUID(uuid), UUID(uuid)])
def test_model(expected):
bijection(UUID, uuid, expected)
@pytest.mark.parametrize("data", [0, "fake"])
def test_model_error(data):
error(data, UUID)
def test_enum():
bijection(SimpleEnum, "a", SimpleEnum.a)
def test_enum_errors():
error("b", SimpleEnum)
@pytest.mark.parametrize("data", [0, "ok"])
def test_literal(data):
bijection(Literal[0, "ok"], data, data)
def test_literal_error():
error(1, Literal[0, "ok"])
@pytest.mark.parametrize(
"data, expected",
[
({"nested": {"a": 0}}, Dataclass(SimpleDataclass(0), None)),
({"nested": {"a": 0}, "opt": None}, Dataclass(SimpleDataclass(0), None)),
({"nested": {"a": 0}, "opt": 100}, Dataclass(SimpleDataclass(0), 100)),
],
)
def test_dataclass(data, expected):
bijection(Dataclass, data, expected)
@pytest.mark.parametrize("data", [{}, {"nested": {}, "opt": 1}])
def test_dataclass_error(data):
error(data, Dataclass)
def test_with_class_context():
@schema(min=100)
class BigInt(int):
pass
bijection(BigInt, 100, BigInt(100))
def test_properties():
@dataclass
class Test:
startswith_a: Mapping[str, Any] = field(metadata=properties("^a.*$"))
others: Mapping[str, Any] = field(metadata=properties)
assert deserialize(Test, {"plop": 0, "allo": 1}) == Test({"allo": 1}, {"plop": 0})
def test_deque():
bijection(deque, [0, 1], deque([0, 1]))
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