Explore bridgeless constructViewTest with WindowManager + CONTENT_APPEARED#104
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Explore bridgeless constructViewTest with WindowManager + CONTENT_APPEARED#104EmilioBejasa wants to merge 2 commits intomainfrom
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…EARED Two key findings: - reactHost.onHostResume(null) must be called before surface.start() or Fabric won't commit mutations even though JS renders successfully - TYPE_APPLICATION_OVERLAY gives Fabric a real Window so the Choreographer fires and commits the shadow tree; ViewHelpers.setupView is not enough Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
tdrhq
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Apr 3, 2026
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ViewHelpers.setupView does not attach the view to a real Window, so Fabric's Choreographer never fires and mutations never apply (blank screenshot)
I linked to how to fix this in your previous PR without using a real window
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Summary
Exploratory branch investigating the correct approach to render a React Native surface in bridgeless mode during instrumentation tests and capture a non-blank screenshot.
Key findings:
ViewHelpers.setupViewdoes not attach the view to a real Window, so Fabric's Choreographer never fires and mutations never apply (blank screenshot)WindowManager.TYPE_APPLICATION_OVERLAYwithalpha=0fprovides a real Window without needing an ActivityreactHost.onHostResume(null)is required beforesurface.start()— without RESUMED lifecycle state, Fabric silently drops all render tree mutationsReactMarkerConstants.CONTENT_APPEAREDis the correct signal for knowing Fabric's first render is completeLAYER_TYPE_SOFTWARE) is required forScreenshot.snap()to capture viadraw(canvas)This branch is exploratory — the actual fix was applied to PR #103.
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