felhom-agent/internal/privapplytest/check.go

// Package privapplytest runs configs/felhom-priv-apply in CHECK-ONLY mode from Go tests (R-861): each renderer's
// real output must be accepted by the root checker, so the two can never drift apart unnoticed. Test-only helper.
package privapplytest

import (
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
	"strings"
	"testing"
)

// Check writes content to a temp file and runs `felhom-priv-apply --check <verb> [name] <file>`. It returns the
// checker's verdict line ("OK" or "REFUSED [rule] …"). Skips when python3 is absent.
func Check(t *testing.T, verb, name, content string) string {
	t.Helper()
	py, err := exec.LookPath("python3")
	if err != nil {
		t.Skip("python3 not available")
	}
	_, here, _, _ := runtime.Caller(0)
	wrapper := filepath.Join(filepath.Dir(here), "..", "..", "configs", "felhom-priv-apply")
	f := filepath.Join(t.TempDir(), "staged")
	if err := os.WriteFile(f, []byte(content), 0o600); err != nil {
		t.Fatal(err)
	}
	args := []string{"-B", wrapper, "--check", verb}
	if name != "" {
		args = append(args, name)
	}
	out, _ := exec.Command(py, append(args, f)...).CombinedOutput()
	return strings.TrimSpace(string(out))
}