Skip to main content

Pytest - Mocking property and setter

I'm having a real hard time understanding how to mock a class that has a property and setter fixtures that access a "private" attribute.

import pytest
from pytest_mock import MockFixture
from unittest.mock import MagicMock
from typing import List

class MyEntity:

    _my_list: List[str] = []

    def __init__(self, list_vals = []):
        self._my_list = list_vals

    @property
    def my_list(self) -> List[str]:
        return self._my_list

    @my_list.setter
    def my_list(self, value: List[str]):
        self._my_list = value

    def append(self, value: str):
        self._my_list.append(value)


class Foo:

    def generate_entity(self, list_vals: List[str]) -> MyEntity:
        return MyEntity()

    def set_values(self, entity: MyEntity, list_vals: List[str]) -> MyEntity:
        entity.my_list = list_vals
        return entity

    def add_value(self, entity: MyEntity, value: str) -> MyEntity:
        entity.append(value)
        return entity


@pytest.fixture
def mock_my_entity(mocker: MockFixture) -> MagicMock:

    namespace = f"{__name__}.{MyEntity.__name__}"
    mock_my_entity = mocker.patch(namespace, autospec=True)

    return mock_my_entity.return_value

def test_foo(mock_my_entity):

    expect_list_values = ["Hello", "World"]

    foo = Foo()
    entity = foo.generate_entity(expect_list_values)
    assert len(entity._my_list) == 0

    entity = foo.set_values(entity, expect_list_values)
    assert entity._my_list == expect_list_values

    expected_extra_value = "more"
    entity = foo.add_value(entity, expected_extra_value)
    assert entity._my_list == expect_list_values + expected_extra_value

After running the test, this is what I get:

mock_my_entity = <NonCallableMagicMock name='MyEntity()' spec='MyEntity' id='4351847632'>

    def test_foo(mock_my_entity):
    
        expect_list_values = ["Hello", "World"]
    
        foo = Foo()
        entity = foo.generate_entity(expect_list_values)
        assert len(entity._my_list) == 0
    
        entity = foo.set_values(entity, expect_list_values)
>       assert entity._my_list == expect_list_values
E       AssertionError: assert <MagicMock na...='4362862544'> == ['Hello', 'World']
E         Right contains 2 more items, first extra item: 'Hello'
E         Full diff:
E         - <MagicMock name='MyEntity()._my_list' spec='list' id='4362862544'>
E         + ['Hello', 'World']

scratchpad.py:58: AssertionError

I've also tried using PropertyMock in various ways, but nothing seems to work.

How do I get this to work. How do I mock the MyEntity class so that everything works the way it should?



source https://stackoverflow.com/questions/70464598/pytest-mocking-property-and-setter

Comments

Popular posts from this blog

Confusion between commands.Bot and discord.Client | Which one should I use?

Whenever you look at YouTube tutorials or code from this website there is a real variation. Some developers use client = discord.Client(intents=intents) while the others use bot = commands.Bot(command_prefix="something", intents=intents) . Now I know slightly about the difference but I get errors from different places from my code when I use either of them and its confusing. Especially since there has a few changes over the years in discord.py it is hard to find the real difference. I tried sticking to discord.Client then I found that there are more features in commands.Bot . Then I found errors when using commands.Bot . An example of this is: When I try to use commands.Bot client = commands.Bot(command_prefix=">",intents=intents) async def load(): for filename in os.listdir("./Cogs"): if filename.endswith(".py"): client.load_extension(f"Cogs.{filename[:-3]}") The above doesnt giveany response from my Cogs ...

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...