Async fixtures (pytest-asyncio) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an async fixture using pytest-asyncio.

PyTest

import pytest

@pytest.fixture
async def sample_fixture():
    await [1]()
    return 42

Drag options to blanks, or click blank then click option'

Atime.sleep(1)

Basyncio.sleep(0)

Cprint('hello')

Dopen('file.txt')

Attempts:

3 left

💡 Hint

Common Mistakes

Using a synchronous function like time.sleep inside an async fixture causes errors.

Not using await before the async call.

The async fixture must await an async function. asyncio.sleep(0) is an async call that pauses briefly.

2fill in blank

medium

Complete the code to mark the test function as async to use the async fixture.

PyTest

import pytest

@pytest.mark.asyncio
async def test_example([1]):
    result = await sample_fixture
    assert result == 42

Drag options to blanks, or click blank then click option'

Asample

Bfixture_sample

Csample_fixture

Dfixture

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong parameter name that does not match the fixture.

Forgetting to mark the test as async with async def.

The test function must accept the fixture name as a parameter to use it. The fixture is named sample_fixture.

3fill in blank

hard

Fix the error in the async fixture by adding the missing decorator.

PyTest

import pytest

async def [1]():
    await asyncio.sleep(0.1)
    return 'done'

Drag options to blanks, or click blank then click option'

Apytest.fixture

Bfixture

Casync_fixture

Dpytest.mark.asyncio

Attempts:

3 left

💡 Hint

Common Mistakes

Using @pytest.mark.asyncio instead of @pytest.fixture for fixtures.

Not adding any decorator causes pytest to ignore the fixture.

Async fixtures require the @pytest.fixture decorator to be recognized by pytest.

4fill in blank

hard

Fill both blanks to create an async fixture that yields a resource and cleans up after the test.

PyTest

import pytest

@pytest.fixture
async def resource():
    res = await setup_resource()
    yield [1]
    await [2](res)

Drag options to blanks, or click blank then click option'

Ares

Bcleanup_resource

Cres.cleanup

Dclose_resource

Attempts:

3 left

💡 Hint

Common Mistakes

Yielding the wrong variable name.

Calling a cleanup method that does not exist or forgetting to await it.

The fixture yields the resource res and then calls cleanup_resource(res) to clean up.

5fill in blank

hard

Fill all three blanks to write a test using an async fixture and assert the awaited result.

PyTest

import pytest

@pytest.mark.asyncio
async def test_resource([1]):
    result = await [2]
    assert result == [3]

Drag options to blanks, or click blank then click option'

Aresource

C'ready'

D'done'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong fixture name in the test parameter.

Asserting the wrong expected value.

The test receives the fixture resource, awaits it, and asserts the result equals 'done'.