Cypress is a popular end-to-end testing framework for web applications. It is easy to use, fast, and reliable. In this tutorial, we will walk you through the steps required to set up and run your first Cypress test.
Prerequisites
Before you can start using Cypress, you need to have Node.js and npm installed on your machine. You can download them from the official Node.js website.
Step 1: Install Cypress
Once you have Node.js and npm installed, you can install Cypress by running the following command in your terminal:
cssCopy codenpm install cypress --save-dev
This command installs Cypress as a dev dependency in your project.
Step 2: Create a Cypress test
To create a Cypress test, navigate to your project directory in the terminal and run the following command:
pythonCopy codenpx cypress open
This command launches the Cypress Test Runner, which allows you to create and run tests. Click on the “New file” button to create a new test file.
In the test file, you can use Cypress commands to interact with your web application. For example, the following code visits the home page of a web application and checks that the page title is correct:
javascriptCopy codedescribe('My first Cypress test', () => {
it('Visits the home page', () => {
cy.visit('https://www.example.com')
cy.title().should('include', 'Example Domain')
})
})
Save the file as my-first-test.js in the cypress/integration directory.
Step 3: Run the Cypress test
To run the Cypress test, go back to the Cypress Test Runner and click on the my-first-test.js file. This will launch a new browser window and run the test. You can watch the test run in real-time and see any errors that occur.
Conclusion
Cypress is a powerful and easy-to-use testing framework for web applications. With just a few commands, you can set up and run your first test. The Cypress Test Runner provides a user-friendly interface for creating and running tests, and the Cypress commands make it easy to interact with your web application. Whether you are a beginner or an experienced developer, Cypress is a great tool for testing your web applications.