Pytest Fixtures haqida

Oldingi testlash darsimizda biz pytest yordamida asosiy testlarni qanday yozishni o'rgandik. Biroq, haqiqiy loyihalarda testlar ishlashidan oldin ma'lum bir holatni o'rnatish (masalan, ma'lumotlar bazasiga ulanish) va keyin uni tozalash kerak bo'ladi. pytest da bu Fixtures (Fiksturalar) yordamida amalga oshiriladi.

Fixture nima?

Fixture - bu test funksiyalaringiz ishlashidan oldin (va xohishga ko'ra keyin) ishlaydigan funksiya.

# non-runnable: requires pytest
import pytest

@pytest.fixture
def sample_user():
    return {"id": 1, "username": "jane_doe", "role": "admin"}

def test_user_is_admin(sample_user):
    assert sample_user["role"] == "admin"

Setup va Teardown (Yield)

Agar return o'rniga yield ishlatsangiz, yield gacha bo'lgan qism testdan oldin (setup), keyingi qism testdan so'ng (teardown/tozalash) ishlaydi.

# non-runnable: requires pytest
import pytest

@pytest.fixture
def database_connection():
    db = connect_to_database()
    yield db  # Test shu yerda bajariladi
    db.close()

def test_insert_user(database_connection):
    database_connection.insert("dummy user")
    assert database_connection.count() == 1

Tayyor funksiyalarni har doim qulay joyda foydalanishingiz mumkin.