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from collections import OrderedDict
from copy import deepcopy
from typing import Callable
from attr import define
from hypothesis import given
from hypothesis.strategies import just, one_of
from pytest import raises
from cattrs import BaseConverter, Converter, UnstructureStrategy
from cattrs.errors import ClassValidationError
from . import unstructure_strats
@define
class Simple:
a: int
@given(strat=unstructure_strats, detailed_validation=..., prefer_attrib=...)
def test_deepcopy(
converter_cls: type[BaseConverter],
strat: UnstructureStrategy,
prefer_attrib: bool,
detailed_validation: bool,
):
c = converter_cls(
unstruct_strat=strat,
prefer_attrib_converters=prefer_attrib,
detailed_validation=detailed_validation,
)
copy = deepcopy(c)
assert c is not copy
assert c.unstructure(Simple(1)) == copy.unstructure(Simple(1))
assert c.detailed_validation == copy.detailed_validation
assert c._prefer_attrib_converters == copy._prefer_attrib_converters
@given(
strat=unstructure_strats,
detailed_validation=...,
prefer_attrib=...,
dict_factory=one_of(just(dict), just(OrderedDict)),
)
def test_copy(
converter_cls: type[BaseConverter],
strat: UnstructureStrategy,
prefer_attrib: bool,
detailed_validation: bool,
dict_factory: Callable,
):
c = converter_cls(
unstruct_strat=strat,
prefer_attrib_converters=prefer_attrib,
detailed_validation=detailed_validation,
dict_factory=dict_factory,
)
copy = c.copy()
assert c is not copy
assert c.unstructure(Simple(1)) == copy.unstructure(Simple(1))
assert c.detailed_validation == copy.detailed_validation
assert c._prefer_attrib_converters == copy._prefer_attrib_converters
assert c._dict_factory == copy._dict_factory
@given(
strat=unstructure_strats,
detailed_validation=...,
prefer_attrib=...,
dict_factory=one_of(just(dict), just(OrderedDict)),
omit_if_default=...,
)
def test_copy_converter(
strat: UnstructureStrategy,
prefer_attrib: bool,
detailed_validation: bool,
dict_factory: Callable,
omit_if_default: bool,
):
"""cattrs.Converter can be copied, and keeps its attributes."""
c = Converter(
unstruct_strat=strat,
prefer_attrib_converters=prefer_attrib,
detailed_validation=detailed_validation,
dict_factory=dict_factory,
omit_if_default=omit_if_default,
)
copy = c.copy()
assert c is not copy
assert c.unstructure(Simple(1)) == copy.unstructure(Simple(1))
assert c.detailed_validation == copy.detailed_validation
assert c._prefer_attrib_converters == copy._prefer_attrib_converters
assert c._dict_factory == copy._dict_factory
assert c.omit_if_default == copy.omit_if_default
another_copy = c.copy(omit_if_default=not omit_if_default)
assert c.omit_if_default != another_copy.omit_if_default
@given(
strat=unstructure_strats,
detailed_validation=...,
prefer_attrib=...,
dict_factory=one_of(just(dict), just(OrderedDict)),
)
def test_copy_hooks(
converter_cls: type[BaseConverter],
strat: UnstructureStrategy,
prefer_attrib: bool,
detailed_validation: bool,
dict_factory: Callable,
):
"""Un/structure hooks are copied over."""
c = converter_cls(
unstruct_strat=strat,
prefer_attrib_converters=prefer_attrib,
detailed_validation=detailed_validation,
dict_factory=dict_factory,
)
c.register_unstructure_hook(Simple, lambda s: s.a)
c.register_structure_hook(Simple, lambda v, _: Simple(v))
assert c.unstructure(Simple(1)) == 1
assert c.structure(1, Simple) == Simple(1)
copy = c.copy()
assert c is not copy
assert c.unstructure(Simple(1)) == copy.unstructure(Simple(1))
assert copy.structure(copy.unstructure(Simple(1)), Simple) == Simple(1)
assert c.detailed_validation == copy.detailed_validation
assert c._prefer_attrib_converters == copy._prefer_attrib_converters
assert c._dict_factory == copy._dict_factory
@given(
strat=unstructure_strats,
detailed_validation=...,
prefer_attrib=...,
dict_factory=one_of(just(dict), just(OrderedDict)),
)
def test_copy_func_hooks(
converter_cls: type[BaseConverter],
strat: UnstructureStrategy,
prefer_attrib: bool,
detailed_validation: bool,
dict_factory: Callable,
):
"""Un/structure function hooks are copied over."""
c = converter_cls(
unstruct_strat=strat,
prefer_attrib_converters=prefer_attrib,
detailed_validation=detailed_validation,
dict_factory=dict_factory,
)
c.register_unstructure_hook_func(lambda t: t is Simple, lambda s: s.a)
c.register_structure_hook_func(lambda t: t is Simple, lambda v, _: Simple(v))
assert c.unstructure(Simple(1)) == 1
assert c.structure(1, Simple) == Simple(1)
copy = c.copy()
assert c is not copy
assert copy.unstructure(Simple(1)) == 1
assert copy.structure(copy.unstructure(Simple(1)), Simple) == Simple(1)
assert c.detailed_validation == copy.detailed_validation
assert c._prefer_attrib_converters == copy._prefer_attrib_converters
assert c._dict_factory == copy._dict_factory
@given(prefer_attrib=..., dict_factory=one_of(just(dict), just(OrderedDict)))
def test_detailed_validation(prefer_attrib: bool, dict_factory: Callable):
"""Copies with different detailed validation work correctly."""
c = Converter(
prefer_attrib_converters=prefer_attrib,
detailed_validation=True,
dict_factory=dict_factory,
)
# So the converter gets generated.
c.structure({"a": 1}, Simple)
copy = c.copy(detailed_validation=False)
assert c is not copy
assert copy.detailed_validation is False
with raises(ClassValidationError):
c.structure({}, Simple)
with raises(KeyError):
copy.structure({}, Simple)
@given(
prefer_attrib=...,
dict_factory=one_of(just(dict), just(OrderedDict)),
detailed_validation=...,
)
def test_col_overrides(
prefer_attrib: bool, dict_factory: Callable, detailed_validation: bool
):
"""Copies with different sequence overrides work correctly."""
c = Converter(
prefer_attrib_converters=prefer_attrib,
detailed_validation=detailed_validation,
dict_factory=dict_factory,
unstruct_collection_overrides={list: tuple},
)
# So the converter gets generated.
assert c.unstructure([1, 2, 3]) == (1, 2, 3)
# We also stick a manual hook on there so it gets copied too.
c.register_unstructure_hook(Simple, lambda s: s.a)
copy = c.copy(unstruct_collection_overrides={})
assert c is not copy
assert c.unstructure([1, 2, 3]) == (1, 2, 3)
assert copy.unstructure([1, 2, 3]) == [1, 2, 3]
assert c.unstructure(Simple(1)) == 1
assert copy.unstructure(Simple(1)) == 1
|
