Cypress is a free, open-source, locally installed Test Runner and Dashboard Service for recording your tests. It is a front-end and back-end automation consulting firms built for the next generation of modern web applications.
It is useful for developers as well as QA engineers to test real-life applications developed in React.js, Angular.js, Node.js, Vue.js, and other front-end technologies.
How does Cypress Work Functionally?
Cypress automation services are executed in the same run loop as your application. Behind Cypress is a Node.js server process.
Most testing tools operate by running outside of the browser and executing remote commands across the network. Cypress does the opposite, while at the same time working outside of the browser for tasks that require higher privileges.
Cypress takes snapshots of your application and enables you to time travel back to the state it was in when commands ran.
Key Features of Cypress:
Mocking – By mocking the server response, it has the ability to test edge cases.
Time Travel – It takes snapshots as your tests run, allowing users to go back and forth in time during test scenarios.
Flake Resistant – It automatically waits for commands and assertions before moving on.
Spies, Stubs, and Clocks – It can verify and control the behavior of functions, server responses, or timers.
Real Time Reloads – It automatically reloads whenever you make changes to your tests.
Consistent Results – It gives consistent and reliable tests that aren’t flaky.
Network Traffic Control – Easily control, stub, and test edge cases without involving your server.
Automatic Waiting – It automatically waits for commands and assertions without ever adding waits or sleeps to your tests. No more async hell.
Screenshots and Videos – View screenshots were taken automatically on failure, or videos of your entire test suite when it has run smoothly.
Debuggability – Readable error messages help you to debug quickly.