pydantic constrained types

pydantic_constraint_types.py

import pytest
from pydantic import BaseModel, conlist, constr, ValidationError


class User(BaseModel):
    name: constr(min_length=1)  # 1
    scores: conlist(int, min_items=1)  # 2


def report(user: User):
    # dummy implementation
    print(f'Hi: {user}')  # 3
    print(f'Max score: {max(user.scores)}')  # 4



def test_register_valid_user():
    user = User(name='John', scores=[4, 5, 8])
    report(user)


@pytest.mark.parametrize(
    'name,friends',
    [
        ('', [1, 2]),  # 5
        ('John', [])  # 6
    ]
)
def test_invalid_users(name, friends):
    with pytest.raises(ValidationError):  # 7
        User(name=name, friends=friends)