FB13800080: Recording/microphone does not work as expected when running automated tests

[alminveh]

• Date: 2024-05-16
• Resolution: Open
• Area: Safari
• OS: macOS 14.4
• Type: Incorrect/Unexpected Behavior
• Keywords: Safari, Microphone, Tests

Details

What does the Safari issue you are seeing involve?
Audio & Video

Description

When using microphone in Safari in automated tests only noise is getting recorded. This only happens when Safari is started from automated tests, not reproducible when running manually.

I tried with WDIO and Playwright, issue is reproducible in both. Also tried with different applications and all of them capture the same audio (just noise).

Tested with different audio input/output devices, it is reproducible with all of them.

Can be reproduced with a simple WDIO or Playwright test with the following steps:
- open https://translate.google.com/?sl=en&tl=es&op=translate
- start recording by clicking on the button to “Translate by voice”
- observe text in the field (“TestTestTestTestTestTest……..” appears in the field although there is no audio input)

Or:
- from WDIO or Playwright test open any page that can record audio
- start recording
- record for some time
- save recording

If you check the audio that is captured it is only “beep - pause - beep - pause…” noise (I attached one small audio sample).

Files

SafariSample.mp4

[alminveh]

This is probably related to WebKitPreferences.mockCaptureDevicesEnabled. If I set it to true then I can reproduce this in manual runs as well, but changing the value to false does not make any difference in automated tests.