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from typing import Any, Optional
from unittest import TestCase
from unittest.mock import ANY
import pytest
from typing_extensions import LiteralString, Self, override
from pydantic_core import ErrorDetails, InitErrorDetails, PydanticCustomError, ValidationError
def test_validation_error_subclassable():
"""Assert subclassable and inheritance hierarchy as expected"""
class CustomValidationError(ValidationError):
pass
with pytest.raises(ValidationError) as exception_info:
raise CustomValidationError.from_exception_data(
'My CustomError',
[
InitErrorDetails(
type='value_error',
loc=('myField',),
msg='This is my custom error.',
input='something invalid',
ctx={
'myField': 'something invalid',
'error': "'something invalid' is not a valid value for 'myField'",
},
)
],
)
assert isinstance(exception_info.value, CustomValidationError)
def test_validation_error_loc_overrides():
"""Override methods in rust pyclass and assert change in behavior: ValidationError.errors"""
class CustomLocOverridesError(ValidationError):
"""Unnests some errors"""
@override
def errors(
self, *, include_url: bool = True, include_context: bool = True, include_input: bool = True
) -> list[ErrorDetails]:
errors = super().errors(
include_url=include_url, include_context=include_context, include_input=include_input
)
return [{**error, 'loc': error['loc'][1:]} for error in errors]
with pytest.raises(CustomLocOverridesError) as exception_info:
raise CustomLocOverridesError.from_exception_data(
'My CustomError',
[
InitErrorDetails(
type='value_error',
loc=(
'hide_this',
'myField',
),
msg='This is my custom error.',
input='something invalid',
ctx={
'myField': 'something invalid',
'error': "'something invalid' is not a valid value for 'myField'",
},
),
InitErrorDetails(
type='value_error',
loc=(
'hide_this',
'myFieldToo',
),
msg='This is my custom error.',
input='something invalid',
ctx={
'myFieldToo': 'something invalid',
'error': "'something invalid' is not a valid value for 'myFieldToo'",
},
),
],
)
TestCase().assertCountEqual(
exception_info.value.errors(),
[
{
'type': 'value_error',
'loc': ('myField',),
'msg': "Value error, 'something invalid' is not a valid value for 'myField'",
'input': 'something invalid',
'ctx': {
'error': "'something invalid' is not a valid value for 'myField'",
'myField': 'something invalid',
},
'url': ANY,
},
{
'type': 'value_error',
'loc': ('myFieldToo',),
'msg': "Value error, 'something invalid' is not a valid value for 'myFieldToo'",
'input': 'something invalid',
'ctx': {
'error': "'something invalid' is not a valid value for 'myFieldToo'",
'myFieldToo': 'something invalid',
},
'url': ANY,
},
],
)
def test_custom_pydantic_error_subclassable():
"""Assert subclassable and inheritance hierarchy as expected"""
class MyCustomError(PydanticCustomError):
pass
with pytest.raises(PydanticCustomError) as exception_info:
raise MyCustomError(
'not_my_custom_thing',
"value is not compatible with my custom field, got '{wrong_value}'",
{'wrong_value': 'non compatible value'},
)
assert isinstance(exception_info.value, MyCustomError)
def test_custom_pydantic_error_overrides():
"""Override methods in rust pyclass and assert change in behavior: PydanticCustomError.__new__"""
class CustomErrorWithCustomTemplate(PydanticCustomError):
@override
def __new__(
cls, error_type: LiteralString, my_custom_setting: str, context: Optional[dict[str, Any]] = None
) -> Self:
message_template = (
"'{my_custom_value}' setting requires a specific my custom field value, got '{wrong_value}'"
)
context = {**context, 'my_custom_value': my_custom_setting}
return super().__new__(cls, error_type, message_template, context)
with pytest.raises(CustomErrorWithCustomTemplate) as exception_info:
raise CustomErrorWithCustomTemplate(
'not_my_custom_thing', 'my_setting', {'wrong_value': 'non compatible value'}
)
assert (
exception_info.value.message()
== "'my_setting' setting requires a specific my custom field value, got 'non compatible value'"
)
|
