test_people.py

from test_case.people import Person, anyone_like_dogs
import pytest

@pytest.fixture()
def person():

    return Person(name = "Bob", favorite_animal = "dog")


def test_anyone_like_dogs_true(person):
    people = [person, person]
    assert anyone_like_dogs(people)

people.py

class Person(object):
    def __init__(self, name, favorite_animal=None):
        self.name = name
        self.favorite_animal = favorite_animal

def anyone_like_dogs(people):
    """Check if 1 person likes dogs"""
    return any(
        [p.favorite_animal == "dog" for p in people]
    )

改进版test_people.py

from test_case.people import Person, anyone_like_dogs
import pytest

@pytest.fixture()
def person(**kwargs):
    count = 0
    def _person(**kwargs):
        nonlocal count
        count+=1
        name = kwargs.pop("name","Bob{}".format(count))

        return Person(name=name, **kwargs)

    return _person

def test_anyone_like_dogs_true(person):
    people = [
        person(favorite_animal = 'cat'),
        person(favorite_animal = 'dog'),
    ]

    assert anyone_like_dogs(people)

def test_person(person):
    assert person().name != person().name
    assert person(name = "Alice").name =="Alice"