import { assertEquals } from "@std/assert";
import {
  TAR_BLOCK_SIZE,
  TAR_TYPEFLAG,
  USTAR_MAGIC,
  USTAR_VERSION,
  ustarHeader,
} from "@binstruct/tar";

const coder = ustarHeader();
const header = {
  name: "hello.txt",
  mode: 0o644,
  uid: 1000,
  gid: 1000,
  size: 5,
  mtime: 1_700_000_000,
  checksum: 0,
  typeflag: TAR_TYPEFLAG.regularFile,
  linkname: "",
  magic: USTAR_MAGIC,
  version: USTAR_VERSION,
  uname: "user",
  gname: "user",
  devmajor: "",
  devminor: "",
  prefix: "",
  padding: new Uint8Array(12),
};

const buffer = new Uint8Array(TAR_BLOCK_SIZE);
const written = coder.encode(header, buffer);
const [decoded, read] = coder.decode(buffer);

assertEquals(written, TAR_BLOCK_SIZE);
assertEquals(read, TAR_BLOCK_SIZE);
assertEquals(decoded, header);