**Cypress** is a #key# end-to-end testing: tests if an application's flow from start to finish is behaving as expected. #key# JavaScript framework.

Cypress is an all-in-one testing framework with its own assertion library, mocking, and stubbing ability. It doesn't use [Selenium](https://www.educative.io/answers/what-is-the-selenium-webdriver), which makes testing modern web applications with Cypress quick and effortless.

> Cypress consists of a free, open-source, locally installed Test Runner and an optional, web-based Dashboard Service for recording your tests.

# Features

A list of features available with Cypress:

- **Time Travel**: Cypress takes snapshots while your tests are running. By hovering over commands in the Command Log, you can see exactly what happened at each step.
- **Debuggability**: Debug directly from familiar tools (like Developer Tools). Debugging is quick and easy with readable errors and stack traces.
- **Automatic Waiting**: Cypress handles synchronization by automatically waiting for commands and assertions.
- **Spies, Stubs, and Clocks**: Enjoy the functionality of unit testing and easily check and test the functions, server responses, or timers. 
- **Network Traffic Control**: Efficiently check, stub, and test edge cases (does not require a server) and customize stubbing network traffic.
- **Consistent Results**: Cypress does not rely on Selenium or WebDriver, making tests fast, consistent, and reliable.
- **Screenshots and Videos**: View screenshots that were taken automatically upon failure or videos of your entire test suite when run from the CLI.
- **Cross-browser Testing**: Run tests within Firefox and #key# Chrome-family: includes Edge and Electron #key# browsers locally and optimally in a CI pipeline.

What is Cypress?

End-to-end JavaScript testing framework with built-in assertions, mocking, stubbing, and unique features like time travel, debugging, screenshots, and cross-browser testing.