new private test file and ref #2330

Job	Run time
build-test-downstream (ubuntu-24.04, ubuntu-24.04-clang-18, ubuntu-24.04-clang-18)	21m 55s
build (windows-2022, windows-2022-msvc-1940, windows-2022-msvc-1940)	3m 14s
build (ubuntu-24.04, ubuntu-24.04-gcc-14, ubuntu-24.04-gcc-14)	17m 25s
build (ubuntu-24.04, ubuntu-24.04-clang-18, android-35-x86_64, 28.1.13356709)	26m 59s
build (macos-15, macos-15-armv8-clang-14, macos-15-armv8-clang-14)	21m 56s
build (ubuntu-24.04, ubuntu-24.04-clang-18, ubuntu-24.04-clang-18)	15m 24s
build (macos-26, macos-26-armv8-clang-14, macos-26-armv8-clang-14)	22m 57s
test	0s
docker	0s
	2h 9m 50s

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