Lazy fixtures in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a lazy fixture using pytest.

PyTest

import pytest

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

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

Adata_fixture

Blazy_fixture

Csetup_data

Dmy_fixture

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid Python identifiers as fixture names.

Forgetting the @pytest.fixture decorator.

The fixture name can be any valid identifier. Here, 'my_fixture' is a valid fixture name.

2fill in blank

medium

Complete the code to use a lazy fixture inside a test function.

PyTest

def test_example([1]):
    assert [1] == 42

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

Asetup_data

Blazy_fixture

Cmy_fixture

Ddata_fixture

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different name than the fixture name in the test function parameter.

Forgetting to include the fixture as a parameter.

The test function parameter must match the fixture name to use it.

3fill in blank

hard

Fix the error in the fixture definition to make it lazy.

PyTest

import pytest

@pytest.fixture(scope='[1]')
def my_fixture():
    return 42

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

Afunction

Bsession

Cmodule

Dlazy

Attempts:

3 left

💡 Hint

Common Mistakes

Using an invalid scope like 'lazy'.

Confusing fixture scope with other pytest parameters.

The default and correct scope for lazy fixtures is 'function', which means the fixture is called lazily for each test function.

4fill in blank

hard

Fill both blanks to use a lazy fixture with indirect parametrization.

PyTest

@pytest.mark.parametrize('input', [1, 2], indirect=[1])
def test_lazy([2]):
    assert input > 0

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

ATrue

BFalse

Cinput

Dmy_fixture

Attempts:

3 left

💡 Hint

Common Mistakes

Setting indirect to False or a wrong value.

Using a test function parameter name different from the parametrize argument.

The 'indirect' parameter must be True to enable lazy fixture usage, and the test function parameter must match the fixture name 'input'.

5fill in blank

hard

Fill all three blanks to correctly use lazy_fixture in a parametrized test.

PyTest

import pytest
from pytest_lazyfixture import lazy_fixture

@pytest.mark.parametrize('data', [[1], [2], [3]])
def test_data(data):
    assert data in [10, 20]

@pytest.fixture
def fixture_a():
    return 10

@pytest.fixture
def fixture_b():
    return 20

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

Alazy_fixture('fixture_a')

Blazy_fixture('fixture_b')

Cfixture_a

Dfixture_b

Attempts:

3 left

💡 Hint

Common Mistakes

Using fixture names directly instead of lazy_fixture calls in parametrize.

Not importing lazy_fixture from pytest_lazyfixture.

Use lazy_fixture('fixture_a') and lazy_fixture('fixture_b') in parametrize to refer to fixtures lazily. The test function parameter 'data' receives the fixture value.