Parallel execution in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is parallel execution in Cypress testing?

Parallel execution means running multiple test files or test cases at the same time on different machines or processes to finish testing faster.

beginner

Why use parallel execution in test automation?

It saves time by running tests simultaneously instead of one after another, helping teams get feedback faster and release software quicker.

intermediate

How does Cypress support parallel execution?

Cypress supports parallel execution by splitting tests across multiple machines or CI agents using its Dashboard Service and a unique --parallel flag.

intermediate

What is the role of the record key in Cypress parallel runs?

The record key in Cypress config enables test results to be sent to the Cypress Dashboard, which helps coordinate parallel test runs and track results.

advanced

Name one challenge when using parallel execution in Cypress.

One challenge is managing shared test data or environment setup because tests run at the same time and might interfere if not isolated properly.

What does parallel execution help achieve in Cypress testing?

A Run tests faster by executing multiple tests at once

B Run tests only on one machine sequentially

C Skip tests that fail

D Run tests without internet connection

Parallel execution runs tests simultaneously on multiple machines or processes to reduce total test time.

Which Cypress feature helps coordinate parallel test runs?

A Cypress local server

B Cypress Test Runner only

C Cypress Dashboard Service

D Cypress CLI without any flags

The Cypress Dashboard Service tracks and coordinates parallel test runs across machines.

What flag is used to enable parallel execution in Cypress CLI?

A --parallel

B --single-run

C --headless

D --record

The --parallel flag tells Cypress to run tests in parallel when used with the Dashboard.

Why is the record option important for parallel runs?

A It runs tests locally only

B It disables test retries

C It skips failed tests automatically

D It sends test results to the Dashboard for coordination

Recording sends results to the Dashboard, which helps manage and report parallel test execution.

What is a common issue when running tests in parallel?

A Tests running slower than sequential

B Tests interfering due to shared data or environment

C Tests cannot run on multiple machines

D Tests always pass without checking

Parallel tests may interfere if they share data or environment without proper isolation.

Explain how Cypress uses the Dashboard Service to enable parallel execution.

Think about how Cypress manages multiple machines running tests at the same time.

Describe one benefit and one challenge of running tests in parallel.

Consider speed and test isolation.