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import collections.abc
import sys
from dataclasses import dataclass, fields
from enum import Enum
from typing import (
Any,
Collection,
Dict,
Generic,
List,
Literal,
Mapping,
NamedTuple,
NewType,
Optional,
Tuple,
TypedDict,
TypeVar,
Union,
)
from unittest.mock import Mock
import pytest
from apischema.types import NoneType
from apischema.typing import Annotated
from apischema.visitor import Unsupported, Visitor
ARG = object()
@pytest.fixture
def visitor() -> Mock:
return Mock()
class NamedTupleExample(NamedTuple):
a: int
b: str = ""
class EnumExample(Enum):
A = "a"
B = "b"
NewTypeExample = NewType("NewTypeExample", int)
def func():
pass
@dataclass
class DataclassExample:
a: int
b: str
class TypedDictExample(TypedDict, total=True):
key1: str
key2: List[int]
class MyInt(int):
pass
pep_585: list = []
if sys.version_info >= (3, 9):
pep_585 = [
(list[int], Visitor.collection, [list, int]),
(tuple[str, ...], Visitor.collection, [tuple, str]),
(
collections.abc.Collection[int],
Visitor.collection,
[collections.abc.Collection, int],
),
(
collections.abc.Mapping[str, int],
Visitor.mapping,
[collections.abc.Mapping, str, int],
),
(dict[str, int], Visitor.mapping, [dict, str, int]),
]
py310: list = []
if sys.version_info >= (3, 10):
py310 = [(int | str, Visitor.union, [(int, str)])]
py311: list = []
if sys.version_info >= (3, 11):
from typing import LiteralString
py311 = [(LiteralString, Visitor.primitive, [str])]
@pytest.mark.parametrize(
"cls, method, args",
[
(List[int], Visitor.collection, [list, int]),
(Tuple[str, ...], Visitor.collection, [tuple, str]),
(Collection[int], Visitor.collection, [collections.abc.Collection, int]),
(Mapping[str, int], Visitor.mapping, [collections.abc.Mapping, str, int]),
(Dict[str, int], Visitor.mapping, [dict, str, int]),
*pep_585,
*py310,
*py311,
(Annotated[int, 42, "42"], Visitor.annotated, [int, (42, "42")]),
(Any, Visitor.any, []),
(
DataclassExample,
Visitor.dataclass,
[
DataclassExample,
{"a": int, "b": str},
(fields(DataclassExample)[0], fields(DataclassExample)[1]),
(),
],
),
(EnumExample, Visitor.enum, [EnumExample]),
(Literal[1, 2], Visitor.literal, [(1, 2)]),
(
NamedTupleExample,
Visitor.named_tuple,
[NamedTupleExample, {"a": int, "b": str}, {"b": ""}],
),
(NewTypeExample, Visitor.new_type, [NewTypeExample, int]),
(int, Visitor.primitive, [int]),
(str, Visitor.primitive, [str]),
(MyInt, Visitor.subprimitive, [MyInt, int]),
(Tuple[str, int], Visitor.tuple, [(str, int)]),
(
TypedDictExample,
Visitor.typed_dict,
(
TypedDictExample,
{"key1": str, "key2": List[int]},
{"key1", "key2"} if sys.version_info >= (3, 9) else (),
),
),
(Optional[int], Visitor.union, [(int, NoneType)]),
(Union[int, str], Visitor.union, [(int, str)]),
],
)
def test_visitor(visitor, cls, method, args):
Visitor.visit(visitor, cls)
getattr(visitor, method.__name__).assert_called_once_with(*args)
T = TypeVar("T")
@dataclass
class GenericExample(Generic[T]):
attr: T
def test_default_implementations(visitor):
assert Visitor.annotated(visitor, int, (42,))
visitor.visit.assert_called_once_with(int)
visitor.reset_mock()
assert Visitor.new_type(visitor, ..., int)
visitor.visit.assert_called_once_with(int)
visitor.reset_mock()
with pytest.raises(Unsupported) as err:
Visitor.unsupported(..., Generic) # type: ignore
assert err.value.type == Generic
with pytest.raises(Unsupported) as err:
Visitor.unsupported(..., Generic[T]) # type: ignore
assert err.value.type == Generic[T]
with pytest.raises(NotImplementedError):
Visitor.named_tuple(..., ..., ..., ...) # type: ignore
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