Same keys and values cause dicts to be equal but data classes are still different

models_should_be_unique.py

from dataclasses import dataclass


def test_given_dicts_with_the_same_keys_values_then_they_are_equal():
    user = {"name": "John", "lastname": "Doe", "age": 42}
    employee = {"name": "John", "lastname": "Doe", "age": 42}

    assert user == employee, "Ideally, these would be different"


@dataclass
class User:
    name: str
    lastname: str
    age: int


@dataclass
class Employee:
    name: str
    lastname: str
    age: int


def test_given_classes_with_same_keys_values_then_they_are_different():
    user = User(name="John", lastname="Doe", age=42)
    employee = Employee(name="John", lastname="Doe", age=42)

    assert user != employee, "This is what we really want"