Parallel execution in CI in Selenium Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is parallel execution in Continuous Integration (CI)?

Parallel execution means running multiple tests at the same time during the CI process. This helps finish testing faster and find problems quickly.

beginner

Why use parallel execution in Selenium tests within CI?

Using parallel execution in Selenium tests saves time by running tests on different browsers or parts of the app at once. It makes feedback faster and improves productivity.

intermediate

Name a common tool or framework to enable parallel test execution in Python Selenium tests.

Pytest with the pytest-xdist plugin is commonly used to run Selenium tests in parallel in Python.

intermediate

What is a key challenge when running Selenium tests in parallel in CI?

A key challenge is managing shared resources like browsers or test data to avoid conflicts. Tests must be independent and isolated to run safely in parallel.

intermediate

How does parallel execution affect test reports in CI?

Parallel execution can make test reports more complex because tests finish at different times. CI tools usually combine results to show a clear summary of all tests.

What is the main benefit of parallel execution in CI?

A Faster test completion

B More detailed test logs

C Simpler test code

D Less hardware usage

Parallel execution runs tests at the same time, reducing total test time.

Which Python tool helps run Selenium tests in parallel?

A requests

B pytest-xdist

C selenium-webdriver

D unittest

pytest-xdist is a plugin for pytest that enables parallel test execution.

What must tests avoid to run safely in parallel?

A Using shared resources without isolation

B Having assertions

C Running on different browsers

D Using explicit waits

Tests must be independent and avoid sharing resources to prevent conflicts.

In CI, how are parallel test results usually shown?

A Only the first test result is shown

B Results are ignored

C Combined into a single report

D Each test result is emailed separately

CI tools combine parallel test results to give a clear summary.

Which is NOT a benefit of parallel execution?

A Faster feedback

B Reduced test time

C Better resource use

D Simpler debugging

Parallel execution can make debugging harder due to simultaneous test runs.

Explain how parallel execution works in a CI pipeline for Selenium tests.

Think about running many tests together instead of one by one.

Describe challenges and solutions when implementing parallel execution in Selenium tests on CI.

Consider what can go wrong when tests share things and how to fix it.