Fixture finalization (request.addfinalizer) in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a finalizer function that prints 'Cleanup done' after the test.

PyTest

def test_example(request):
    def cleanup():
        print('Cleanup done')
    request.[1](cleanup)
    assert True

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

Aadd_cleanup

Bfinalize

Caddfinalizer

Dregister_finalizer

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'finalize' instead of 'addfinalizer'.

Trying to call 'register_finalizer' which does not exist.

The correct method to add a finalizer in pytest fixtures is 'addfinalizer'.

2fill in blank

medium

Complete the fixture code to add a finalizer that closes the resource after the test.

PyTest

import pytest

@pytest.fixture
def resource(request):
    res = open('file.txt')
    request.[1](res.close)
    return res

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

Aaddfinalizer

Badd_cleanup

Cregister_cleanup

Dfinalize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'finalize' which is not a pytest method.

Trying to use 'add_cleanup' which does not exist in pytest.

Use 'addfinalizer' to register the resource's close method for cleanup after the test.

3fill in blank

hard

Fix the error in the fixture by correctly adding a finalizer that prints 'Done' after the test.

PyTest

import pytest

@pytest.fixture
def sample(request):
    def fin():
        print('Done')
    request.[1](fin)
    return 42

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

Afinalize

Baddfinalizer

Cadd_cleanup

Dregister_finalizer

Attempts:

3 left

💡 Hint

Common Mistakes

Calling the finalizer function inside 'addfinalizer' instead of passing it.

Using a non-existent method like 'finalize'.

The finalizer function should be passed without calling it. Use 'addfinalizer(fin)' not 'addfinalizer(fin())'.

4fill in blank

hard

Fill both blanks to create a fixture that opens a file and adds a finalizer to close it after the test.

PyTest

import pytest

@pytest.fixture
def file_resource(request):
    f = open('data.txt')
    request.[1](f.[2])
    return f

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

Aaddfinalizer

Bclose

Cflush

Dfinalize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'flush' instead of 'close' to clean up the file.

Using 'finalize' which is not a pytest method.

Use 'addfinalizer' to register the 'close' method of the file for cleanup.

5fill in blank

hard

Fill all three blanks to create a fixture that sets up a database connection, adds a finalizer to disconnect, and returns the connection.

PyTest

import pytest

class DBConnection:
    def connect(self):
        print('Connected')
    def disconnect(self):
        print('Disconnected')

@pytest.fixture
def db(request):
    conn = DBConnection()
    conn.[1]()
    request.[2](conn.[3])
    return conn

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

Aconnect

Baddfinalizer

Cdisconnect

Dfinalize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'finalize' instead of 'addfinalizer'.

Calling 'disconnect' immediately instead of passing it to 'addfinalizer'.

Call 'connect' to set up, use 'addfinalizer' to register 'disconnect' for cleanup.