gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.iterator/deref.nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.iterator/eq.nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.iterator/iter_move.nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.overview/adaptor.nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.sentinel/eq.nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.view/base.nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.view/begin.nodiscard.verify.cpp",
    "//libcxx/test/libcxx/ranges/range.adaptors/range.join.with/range.join.with.view/end.nodiscard.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": []
}