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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);
});
});
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