Adjust assertions testing React implementation details #6983

Job	Run time
build-wasm (web)	23s
build	2m 1s
build-wasm (nodejs)	21s
deploy-target	8s
stable - x86_64-apple-darwin - node@16	1m 32s
stable - aarch64-apple-darwin - node@16	49s
stable - x86_64-pc-windows-msvc - node@16	2m 3s
stable - x86_64-unknown-linux-gnu - node@16	53s
stable - aarch64-unknown-linux-gnu - node@16	1m 4s
Deploy examples	0s
Deploy preview tarball	2m 4s
Potentially publish release	0s
Upload Turbopack Bytesize metrics to Datadog	0s
Release Stats	0s
	11m 18s

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