denoland-deno/tests/unit/resources_test.ts

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.

// deno-lint-ignore-file no-deprecated-deno-api

import {
  assert,
  assertEquals,
  assertThrows,
  DENO_FUTURE,
} from "./test_util.ts";

const listenPort = 4505;

Deno.test(function resourcesCloseBadArgs() {
  assertThrows(() => {
    Deno.close((null as unknown) as number);
  }, TypeError);
});

Deno.test({ ignore: DENO_FUTURE }, function resourcesStdio() {
  const res = Deno.resources();

  assertEquals(res[0], "stdin");
  assertEquals(res[1], "stdout");
  assertEquals(res[2], "stderr");
});

Deno.test(
  { ignore: DENO_FUTURE, permissions: { net: true } },
  async function resourcesNet() {
    const listener = Deno.listen({ port: listenPort });
    const dialerConn = await Deno.connect({ port: listenPort });
    const listenerConn = await listener.accept();

    const res = Deno.resources();
    assertEquals(
      Object.values(res).filter((r): boolean => r === "tcpListener").length,
      1,
    );
    const tcpStreams = Object.values(res).filter(
      (r): boolean => r === "tcpStream",
    );
    assert(tcpStreams.length >= 2);

    listenerConn.close();
    dialerConn.close();
    listener.close();
  },
);

Deno.test(
  { ignore: DENO_FUTURE, permissions: { read: true } },
  async function resourcesFile() {
    const resourcesBefore = Deno.resources();
    const f = await Deno.open("tests/testdata/assets/hello.txt");
    const resourcesAfter = Deno.resources();
    f.close();

    // check that exactly one new resource (file) was added
    assertEquals(
      Object.keys(resourcesAfter).length,
      Object.keys(resourcesBefore).length + 1,
    );
    const newRid = +Object.keys(resourcesAfter).find((rid): boolean => {
      return !Object.prototype.hasOwnProperty.call(resourcesBefore, rid);
    })!;
    assertEquals(resourcesAfter[newRid], "fsFile");
  },
);