wix-incubator / DetoxSync

Synchronization framework for Detox and other testing frameworks
MIT License
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fix(DTXReactNativeSupport): JS and Content can load in any order #74

Open TimotheeIsnard opened 6 months ago

TimotheeIsnard commented 6 months ago

Hello, submitting a fix for a DetoxSync issue I'm running into with React Native.

This is my first PR to DetoxSync, so please let me know if I got anything wrong =)


Previously waitForReactNativeLoadWithCompletionHandler would add an observer for "RCTJavaScriptDidLoadNotification", then when notified would add a second observer for "RCTContentDidAppearNotification", and after getting a notification for both it would call the completion handler.

However, with the React Native new architecture the loading of the JS and Content can happen in a different order (content first). This would cause DetoxSync to get stuck when enabling synchronization.

Instead, we register all observers (JS, content, failure) one after the other, and we use a race-free C11 atomic to count when we receive a successful JS or Content notification. After we receive both (or fail), we call the handler as before.