Function concat

packages/plugins/apps/src/source/app-source.test.ts:23–31

(parts: readonly Uint8Array[])

const textEncoder = new TextEncoder();

const concat = (parts: readonly Uint8Array[]): Uint8Array => {
  const out = new Uint8Array(parts.reduce((sum, part) => sum + part.length, 0));
  let offset = 0;
  for (const part of parts) {
    out.set(part, offset);
    offset += part.length;
  }
  return out;
};

const sideBand = (bytes: Uint8Array): Uint8Array => {
  const chunks: Uint8Array[] = [pktLine("NAK\n")];