package hash

import (
	"os"
	"path/filepath"
	"testing"
)

func TestFileSHA256(t *testing.T) {
	dir := t.TempDir()
	p := filepath.Join(dir, "a.pdf")
	if err := os.WriteFile(p, []byte("%PDF-1.4 test"), 0o600); err != nil {
		t.Fatal(err)
	}
	got, err := FileSHA256(p)
	if err != nil {
		t.Fatal(err)
	}
	if len(got) != 64 {
		t.Fatalf("len=%d", len(got))
	}
	again, err := FileSHA256(p)
	if err != nil || again != got {
		t.Fatalf("not deterministic: %v %s vs %s", err, got, again)
	}
}

func TestNormalizeDigest(t *testing.T) {
	const hex64 = "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
	got, err := NormalizeDigest("SHA256:" + hex64)
	if err != nil || got != hex64 {
		t.Fatalf("got %q err %v", got, err)
	}
	if _, err := NormalizeDigest("short"); err == nil {
		t.Fatal("expected error")
	}
}