import { OneByteReader } from "https://deno.land/std@0.78.0/io/_iotest.ts";
OneByteReader returns a Reader that implements each non-empty Read by reading one byte from r.
import { OneByteReader } from "https://deno.land/std@0.78.0/io/_iotest.ts";
OneByteReader returns a Reader that implements each non-empty Read by reading one byte from r.