Handling shared resources in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a fixture that sets up a shared resource.

PyTest

import pytest

@pytest.fixture
 def shared_resource():
     resource = {'count': 0}
     yield resource
     resource.clear()

def test_increment(shared_resource):
     shared_resource['count'] [1] 1
     assert shared_resource['count'] == 1

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

A+=

B-=

C*=

D/=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-=' decreases the count, causing the test to fail.

Using '*=' or '/=' changes the count incorrectly.

The '+=' operator increments the count by 1, which matches the assertion.

2fill in blank

medium

Complete the code to ensure the shared resource is reset before each test.

PyTest

import pytest

@pytest.fixture(autouse=True)
 def reset_resource(shared_resource):
     shared_resource['count'] = [1]

def test_reset(shared_resource):
     assert shared_resource['count'] == 0

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

A1

B-1

C0

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Setting count to 1 causes the test to fail because the assertion expects 0.

Setting count to None or negative values is not appropriate here.

Resetting the count to 0 ensures the shared resource starts fresh for each test.

3fill in blank

hard

Fix the error in the test that modifies the shared resource incorrectly.

PyTest

def test_decrement(shared_resource):
     shared_resource['count'] [1] 1
     assert shared_resource['count'] == -1

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

A+=

B-=

C*=

D/=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+=' increases the count, causing the assertion to fail.

Using '*=' or '/=' changes the value incorrectly.

Using '-=' decreases the count by 1, matching the expected assertion of -1.

4fill in blank

hard

Fill both blanks to create a fixture that yields a resource and cleans it after use.

PyTest

import pytest

@pytest.fixture
 def resource():
     data = []
     yield [1]
     [2].clear()

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

Adata

Bresource

Attempts:

3 left

💡 Hint

Common Mistakes

Yielding or clearing a variable not defined causes errors.

Using different variable names for yield and clear breaks the cleanup.

The fixture yields 'data' and then clears 'data' after the test finishes.

5fill in blank

hard

Fill all three blanks to create a test that uses a shared resource and asserts its state.

PyTest

def test_shared_state([1]):
     [2]['count'] += 2
     assert [3]['count'] == 2

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

Ashared_resource

Dresource

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names causes NameError or test failures.

Referencing undefined variables breaks the test.

The test function parameter and all references use 'shared_resource' to access the shared data.