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from dataclasses import dataclass, field
from typing import NewType
import pytest
from apischema import ValidationError, deserialize, schema
Tag = NewType("Tag", str)
schema(min_len=3, pattern=r"^\w*$", examples=["available", "EMEA"])(Tag)
@dataclass
class Resource:
id: int
tags: list[Tag] = field(
default_factory=list,
metadata=schema(
description="regroup multiple resources", max_items=3, unique=True
),
)
with pytest.raises(ValidationError) as err: # pytest check exception is raised
deserialize(
Resource, {"id": 42, "tags": ["tag", "duplicate", "duplicate", "bad&", "_"]}
)
assert err.value.errors == [
{"loc": ["tags"], "err": "item count greater than 3 (maxItems)"},
{"loc": ["tags"], "err": "duplicate items (uniqueItems)"},
{"loc": ["tags", 3], "err": "not matching pattern ^\\w*$ (pattern)"},
{"loc": ["tags", 4], "err": "string length lower than 3 (minLength)"},
]
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