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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import { assertEquals } from "../testing/asserts.ts";import { LimitedReader } from "./limited_reader.ts";import { StringWriter } from "./string_writer.ts";import { copy } from "../streams/copy.ts";import { readAll } from "../streams/read_all.ts";import { StringReader } from "./string_reader.ts";
Deno.test("ioLimitedReader", async function () {  const decoder = new TextDecoder();  let sr = new StringReader("abc");  let r = new LimitedReader(sr, 2);  let buffer = await readAll(r);  assertEquals(decoder.decode(buffer), "ab");  assertEquals(decoder.decode(await readAll(sr)), "c");  sr = new StringReader("abc");  r = new LimitedReader(sr, 3);  buffer = await readAll(r);  assertEquals(decoder.decode(buffer), "abc");  assertEquals((await readAll(r)).length, 0);  sr = new StringReader("abc");  r = new LimitedReader(sr, 4);  buffer = await readAll(r);  assertEquals(decoder.decode(buffer), "abc");  assertEquals((await readAll(r)).length, 0);});
Deno.test("ioLimitedReader", async function () {  const rb = new StringReader("abc");  const wb = new StringWriter();  await copy(new LimitedReader(rb, -1), wb);  assertEquals(wb.toString(), "");});