# Cypress js ### Introduction * Used for **End to End testing** * Run our tests in browser in a real world environment * We can add it in our `package.json` script with `cypress open` which will open the test runner window in our browser * Similar to jest, we have to describe test suits with our it test cases inside, in addition to normal tests, we can interact with a button or simulate clicks via jquery like syntax *** --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://notes.nomanaziz.me/development/testing/cypress-js.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.