gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//clang/unittests/AST/ByteCode/CMakeLists.txt",
    "//clang/unittests/AST/CMakeLists.txt",
    "//clang/unittests/ASTMatchers/CMakeLists.txt",
    "//clang/unittests/ASTMatchers/Dynamic/CMakeLists.txt",
    "//clang/unittests/Analysis/CMakeLists.txt",
    "//clang/unittests/Analysis/FlowSensitive/CMakeLists.txt",
    "//clang/unittests/Basic/CMakeLists.txt",
    "//clang/unittests/CMakeLists.txt",
    "//clang/unittests/CodeGen/CMakeLists.txt",
    "//clang/unittests/CrossTU/CMakeLists.txt",
    "//clang/unittests/DirectoryWatcher/CMakeLists.txt",
    "//clang/unittests/Driver/CMakeLists.txt",
    "//clang/unittests/Format/CMakeLists.txt",
    "//clang/unittests/Frontend/CMakeLists.txt",
    "//clang/unittests/Index/CMakeLists.txt",
    "//clang/unittests/InstallAPI/CMakeLists.txt",
    "//clang/unittests/Interpreter/CMakeLists.txt",
    "//clang/unittests/Interpreter/ExceptionTests/CMakeLists.txt",
    "//clang/unittests/Lex/CMakeLists.txt",
    "//clang/unittests/Rewrite/CMakeLists.txt",
    "//clang/unittests/Sema/CMakeLists.txt",
    "//clang/unittests/Serialization/CMakeLists.txt",
    "//clang/unittests/StaticAnalyzer/CMakeLists.txt",
    "//clang/unittests/Support/CMakeLists.txt",
    "//clang/unittests/Tooling/CMakeLists.txt",
    "//clang/unittests/Tooling/Syntax/CMakeLists.txt",
    "//clang/unittests/libclang/CMakeLists.txt",
    "//clang/unittests/libclang/CrashTests/CMakeLists.txt"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}