Retry mechanism for flaky tests in Selenium Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a flaky test in software testing?

A flaky test is a test that sometimes passes and sometimes fails without any changes in the code. It behaves unpredictably, often due to timing or environment issues.

beginner

Why do we use a retry mechanism for flaky tests?

We use retry mechanisms to automatically rerun tests that fail due to temporary issues. This helps reduce false failures and makes test results more reliable.

intermediate

How can you implement a retry mechanism in Selenium with Python?

You can implement retry by using a decorator or a loop that reruns the test function a set number of times until it passes or the retries run out.

intermediate

What is a simple example of a retry decorator in Python for flaky tests?

A retry decorator runs a test function multiple times if it raises an exception, stopping early if the test passes. It helps handle flaky failures automatically.

beginner

Name one common cause of flaky tests in Selenium automation.

Common causes include timing issues like waiting for elements to load, network delays, or asynchronous page behavior.

What does a retry mechanism do in test automation?

A Reruns failed tests automatically to reduce false failures

B Skips tests that fail

C Runs tests only once

D Ignores all test failures

Retry mechanisms rerun tests that fail temporarily to avoid false negatives.

Which of these is a common cause of flaky tests?

A Consistent test data

B Stable network connection

C Proper synchronization

D Timing issues like slow page loads

Timing issues such as slow page loads often cause flaky tests.

In Python, what feature can help implement retries elegantly?

A Decorators

B Global variables

C List comprehensions

D Lambda functions

Decorators can wrap test functions to add retry logic cleanly.

What should a retry mechanism do when a test passes on a retry?

A Continue retrying until max retries

B Stop retrying and mark test as passed

C Mark test as failed anyway

D Skip the test

Once a test passes on retry, the mechanism should stop and mark it passed.

Which Selenium Python tool can help wait for elements to avoid flaky tests?

A Random sleeps

B Print statements

C Explicit waits

D Hardcoded delays

Explicit waits wait for conditions and reduce flaky failures.

Explain what a flaky test is and why retry mechanisms help in Selenium testing.

Think about tests that fail sometimes without code changes and how retrying helps.

Describe how you would implement a simple retry mechanism in Python for Selenium tests.

Consider wrapping the test function to catch failures and retry.