gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/.clang-format",
    "//libcxx/include/__config",
    "//libcxx/include/__memory/construct_at.h",
    "//libcxx/include/print",
    "//libcxx/include/string",
    "//libcxx/include/string_view",
    "//libcxx/test/libcxx/algorithms/specialized.algorithms/nonnull.verify.cpp",
    "//libcxx/test/libcxx/input.output/iostream.format/print.fun/nonnull.verify.cpp",
    "//libcxx/test/libcxx/strings/basic.string/nonnull.verify.cpp",
    "//libcxx/test/libcxx/strings/string.view/assert.ctor.pointer.pass.cpp",
    "//libcxx/test/libcxx/strings/string.view/nonnull.verify.cpp"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}
running all tests due to change to blacklisted file