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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import {  assertEquals,  assertNotEquals,  assertStrictEquals,} from "../testing/asserts.ts";import { BufReader, ReadLineResult } from "../io/buf_reader.ts";import { dirname, fromFileUrl } from "../path/mod.ts";import { TextLineStream } from "../streams/text_line_stream.ts";
const moduleDir = dirname(fromFileUrl(import.meta.url));
Deno.test({  name: "[examples/echo_server]",  sanitizeResources: false, // TODO(@crowlKats): re-enable once https://github.com/denoland/deno/pull/14686 lands}, async () => {  const encoder = new TextEncoder();  const decoder = new TextDecoder();  const process = new Deno.Command(Deno.execPath(), {    args: ["run", "--quiet", "--allow-net", "echo_server.ts"],    stdout: "piped",    stderr: "null",    cwd: moduleDir,  });  const child = process.spawn();  let conn: Deno.Conn | undefined;  try {    const r = child.stdout.pipeThrough(new TextDecoderStream()).pipeThrough(      new TextLineStream(),    );    const reader = r.getReader();    const res = await reader.read();    await reader.cancel();
    assertEquals(res.done, false);    assertStrictEquals(res.value!.trim(), "Listening on http://localhost:8080");
    conn = await Deno.connect({ hostname: "127.0.0.1", port: 8080 });    const connReader = new BufReader(conn);
    await conn.write(encoder.encode("Hello echo_server\n"));    const result = await connReader.readLine();
    assertNotEquals(result, null);
    const actualResponse = decoder      .decode((result as ReadLineResult).line)      .trim();    const expectedResponse = "Hello echo_server";
    assertStrictEquals(actualResponse, expectedResponse);  } finally {    child.kill("SIGTERM");    await child.status;    conn?.close();  }});