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// Copyright Node.js contributors. All rights reserved. MIT License.import { Buffer } from "../buffer.ts";import Transform from "./transform.ts";import finished from "./end_of_stream.ts";import { deferred } from "../../async/mod.ts";import { assert, assertEquals } from "../../testing/asserts.ts";
Deno.test("Transform stream finishes correctly", async () => {  let finishedExecuted = 0;  const finishedExecutedExpected = 1;  const finishedExecution = deferred();
  const tr = new Transform({    transform(_data, _enc, cb) {      cb();    },  });
  let finish = false;  let ended = false;
  tr.on("end", () => {    ended = true;  });
  tr.on("finish", () => {    finish = true;  });
  finished(tr, (err) => {    finishedExecuted++;    if (finishedExecuted === finishedExecutedExpected) {      finishedExecution.resolve();    }    assert(!err, "no error");    assert(finish);    assert(ended);  });
  tr.end();  tr.resume();
  const finishedTimeout = setTimeout(    () => finishedExecution.reject(),    1000,  );  await finishedExecution;  clearTimeout(finishedTimeout);  assertEquals(finishedExecuted, finishedExecutedExpected);});
Deno.test("Transform stream flushes data correctly", () => {  const expected = "asdf";
  const t = new Transform({    transform: (_d, _e, n) => {      n();    },    flush: (n) => {      n(null, expected);    },  });
  t.end(Buffer.from("blerg"));  t.on("data", (data) => {    assertEquals(data.toString(), expected);  });});