[tests] <StrictMode /> nested in tree is broken

[rickhanlonii]

Adds a test that shows using anywhere outside of the root node will not fire strict effects.

This works:

root.render(
  <StrictMode>
    <App>
      <Children />
    </App>
  </StrictMode>
);

This does not fire strict effects on mount:

root.render(
  <App>
    <StrictMode>
      <Children />
    </StrictMode>
  </App>
);

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
react-compiler-playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 17, 2024 9:14pm

[react-sizebot]

Comparing: 34ee391...bbc0f14

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	=	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	510.66 kB	510.66 kB	=	91.30 kB	91.30 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	+0.05%	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	515.44 kB	515.44 kB	=	92.15 kB	92.15 kB
facebook-www/ReactDOM-prod.classic.js	=	592.36 kB	592.36 kB	=	104.36 kB	104.36 kB
facebook-www/ReactDOM-prod.modern.js	=	582.63 kB	582.63 kB	=	102.81 kB	102.81 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 3338ac8