Function fillBytes

io/buffer_test.ts:41–56

(
  buf: Buffer,
  s: string,
  n: number,
  fub: Uint8Array,
)

// The initial contents of buf corresponds to the string s;
// the result is the final contents of buf returned as a string.
async function fillBytes(
  buf: Buffer,
  s: string,
  n: number,
  fub: Uint8Array,
): Promise<string> {
  check(buf, s);
  for (; n > 0; n--) {
    const m = await buf.write(fub);
    assertEquals(m, fub.byteLength);
    const decoder = new TextDecoder();
    s += decoder.decode(fub);
    check(buf, s);
  }
  return s;
}

// Empty buf through repeated reads into fub.
// The initial contents of buf corresponds to the string s.