Support on automating SignalR/Websocket APIs

General Discussions
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Hi Everyone,

I recently received a requirement to automate testing for SignalR/WebSocket APIs. Since the data is real-time and changes every second, I’m finding it a bit challenging to determine the best approach for automation.

Has anyone worked on automating SignalR or WebSocket APIs before? I’d really appreciate any guidance, best practices, or tools you’ve used that could help me get started.

2

Hey @vishnuprakash9845 I’ve looked into this before as well.

LambdaTest is fantastic when it comes to cross-browser testing and running UI automation with Selenium, Cypress, or Playwright. But when it comes to directly automating SignalR or WebSocket APIs, it doesn’t currently offer built-in support for that level of real-time, event-driven API testing.

For SignalR/WebSocket automation, I’d recommend using tools that are more protocol-focused. For example:

  • In Node.js, libraries like ws or socket.io-client let you connect to a WebSocket endpoint and interact with the server.
  • In Python, the websockets or websocket-client libraries can help you build custom scripts to send/receive real-time data and validate responses.

That said, if your WebSocket events trigger changes on the frontend (like dynamic UI updates), you can use LambdaTest to validate those end-to-end, especially in combination with your real-time test scripts.

So while LambdaTest can be part of the flow, for actual API-level validation of WebSocket/SignalR data, you’d need to complement it with custom test scripts or API testing tools.

Happy to share sample setups or tools I’ve seen work well!