Ordering tests for parallel safety in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to mark a test to run serially using pytest.

PyTest

import pytest

@pytest.mark.[1]
def test_database_connection():
    assert connect_to_db() is True

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

Aorder

Bserial_run

Crun_serial

Dserial

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect marker names like 'serial_run' or 'run_serial'.

Trying to use 'order' which is unrelated.

The correct marker to indicate a test should run serially is '@pytest.mark.serial'.

2fill in blank

medium

Complete the code to ensure tests run in a specific order using pytest-ordering.

PyTest

import pytest

@pytest.mark.order([1])
def test_initialize():
    assert setup_environment() is True

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

A1

B'first'

C'start'

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings instead of integers for order.

Starting order from 0 instead of 1.

The '@pytest.mark.order(1)' decorator sets the test to run first in order.

3fill in blank

hard

Fix the error in the test function to avoid parallel execution conflicts.

PyTest

import pytest

@pytest.mark.[1]
def test_modify_shared_resource():
    resource.lock()
    modify_resource()
    resource.unlock()

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

Aconcurrent

Bparallel

Cserial

Dasync

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'parallel' or 'concurrent' which allow parallel runs.

Using 'async' which is unrelated to test ordering.

Marking the test as 'serial' ensures it does not run in parallel, avoiding conflicts.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that orders tests by priority and skips low priority.

PyTest

test_order = {test: priority for test, priority in tests.items() if priority [1] [2]

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

A>

B1

C<

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' causing wrong tests to be selected.

Using '1' instead of '0' as threshold.

The comprehension keeps tests with priority greater than 0, skipping low priority tests.

5fill in blank

hard

Fill all three blanks to create a test report dictionary filtering passed tests with duration over 1 second.

PyTest

report = {test['name']: test['duration'] for test in test_results if test['status'] == [1] and test['duration'] [2] [3]

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

A'passed'

B>

C1

D'failed'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'failed' instead of 'passed' for status.

Using '<' instead of '>' for duration comparison.

Using 0 or other numbers instead of 1 for duration.

The dictionary includes tests that passed and took longer than 1 second.