What is the best way to simulate "open an web browser application and login" without having to open 400 browsers to get 400 users online?

• Playwright

  387 62,881 9.9 TypeScript

  Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.

  

You want to use an web automation framework for that. Look at https://playwright.dev/ or selenium to do this and after creating your test, run those using headless browsers.

• SurveyJS

  surveyjs.io featured

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• artillery

  30 7,596 9.7 JavaScript

  The complete load testing platform. Everything you need for production-grade load tests. Serverless & distributed. Load test with Playwright. Load test HTTP APIs, GraphQL, WebSocket, and more. Use any Node.js module.

  

https://www.artillery.io/ and https://k6.io/ works great for load testing. If needed you can run from multiple cloud instances.

• NBomber

  3 2,047 7.4 CSS

  Modern and flexible load testing framework for Pull and Push scenarios, designed to test any system regardless a protocol (HTTP/WebSockets/AMQP etc) or a semantic model (Pull/Push).

  

You can also use NBomber where you can write the loadtests in c#

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