get fake camera feed working w arguments: `--use-fake-device-for-media-stream` and `--use-fake-ui-for-media-stream` for testing video throughput in Cypress

[jywarren]

Hi @jywarren, I'm not able to get the fake camera feed work 😕 by passing in the arguments: --use-fake-device-for-media-stream and --use-fake-ui-for-media-stream in the Selenium Chrome driver. Other than that I've created tests for /upload, /capture and /capture/v2 routes which capture the spectrum and delete it after logging in with a random username using the faker gem.

More on this at -

• https://webrtc.github.io/webrtc-org/testing/
• https://elh.mx/generales/testing-webrtc-fake-camera-with-cucumbercapybara-in-chrome/

Originally posted by @waridrox in #702 (comment)

[jywarren]

Just moving here so we can keep working on this issue!

[waridrox]

Here's the fake-media-stream that should show up for reference -

This is with cypress though...

[jywarren]

For reference linking to publiclab/spectral-workbench.js#245

And, i think the format for using a local test video is:

webrtc/samples#616 (comment)

--use-fake-device-for-media-stream --use-file-for-fake-video-capture="D:\Test\Video\y4m.y4m"

?

[jywarren]

https://docs.cypress.io/api/plugins/browser-launch-api#Use-fake-video-for-webcam-testing

Should this help?

Thanks for this - it's exciting!!!

[waridrox]

Yes this would do, it's just that currently I don't have that much experience with cypress testing, so I'll circle back here to write some more tests later...

[jywarren]

OK, great. If you could try creating a PR with the cypress test, and even if it doesn't work, just open and point me at where it's going wrong, I can help debug!

Great!!!

[jywarren]

So just btw, is this solved in https://github.com/publiclab/spectral-workbench.js/ (or esp. in publiclab/spectral-workbench.js#245)? and will solving it there solve it here too, or is there a distinct issue with this argument in Rails system tests?

[jywarren]

I believe we were able to resolve #245 without actually faking the camera input - we just checked for a large enough file size in the downloaded image. Later if we add a video or still image of a spectrum, we could refine our tests to look for more, and pursue this!