Set initial background state to foreground if initial app state is 'inactive'

[yousif-bugsnag]

Goal

In React Native 0.74+, when an iOS app launches the initial AppStateStatus changed from unknown to inactive. This wasn't being accounted for in the backgrounding listener, so the initial background state was incorrectly being set to in-background.

This PR updates the React Native backgrounding listener so that the app is considered in foreground on launch unless the initial app state is background.

Design

When the backgrounding listener is created the initial app state is now only set to in-background if the initial app state status is explicitly background - any other initial state (active, inactive, or unknown) is considered in-foreground until an app state change event occurs.

Testing

Covered by unit tests and manual testing.

The current structure of the end-to-end test fixture means that we can't test this effectively since the app state status is always 'active' when the scenario runs. This will be addressed in a later PR.

[github-actions[bot]]

Browser bundle size

NPM build

	Package
Before	193.47 kB
After	193.47 kB
±	No change

CDN build

	Unminified	Minfied	Minified + gzipped
Before	96.91 kB	36.36 kB	10.97 kB
After	96.91 kB	36.36 kB	10.97 kB
±	No change	No change	No change

Code coverage

Ok	File (✨=New File)	Lines	Branches	Functions	Statements
🔴	/home/runner/work/bugsnag-js-performance/bugsnag-js-performance/packages/platforms/react-native/lib/backgrounding-listener.ts	100% (+0%)	85.71% (-14.29%)	100% (+0%)	100% (+0%)

Total:

Lines	Branches	Functions	Statements
86.74%(+0%)	77.18%(-0.21%)	87.84%(+0%)	83.54%(+0%)

Generated against 4cd5ca7d97fee59ddd07e4fa206e9af3cdc7fa67 on 20 August 2024 at 08:27:13 UTC