95 lines
2.5 KiB
TypeScript
95 lines
2.5 KiB
TypeScript
// Copyright 2024 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { assert } from 'chai';
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import { Readable } from 'node:stream';
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import { once } from 'node:events';
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import { toWebStream } from '../../util/toWebStream';
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describe('toWebStream', () => {
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it('only reads what it needs', async () => {
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const CHUNK_SIZE = 16 * 1024;
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let pushed = 0;
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const readable = new Readable({
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read() {
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pushed += 1;
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this.push(Buffer.alloc(CHUNK_SIZE));
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},
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});
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const reader = toWebStream(readable).getReader();
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const { value, done } = await reader.read();
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// One to be read, one buffered
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assert.strictEqual(pushed, 2);
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assert.isFalse(done);
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assert.strictEqual(value?.byteLength, 2 * CHUNK_SIZE);
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});
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it('closes controller on end', async () => {
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const readable = Readable.from([
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Buffer.from('hello '),
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Buffer.from('world'),
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]);
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const reader = toWebStream(readable).getReader();
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{
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const { value, done } = await reader.read();
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assert.strictEqual(value?.toString(), 'hello ');
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assert.isFalse(done);
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}
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{
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const { value, done } = await reader.read();
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assert.strictEqual(value?.toString(), 'world');
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assert.isFalse(done);
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}
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{
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const { value, done } = await reader.read();
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assert.isUndefined(value);
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assert.isTrue(done);
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}
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});
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it('handles premature close', async () => {
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const readable = new Readable({
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read() {
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// no-op
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},
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});
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const reader = toWebStream(readable).getReader();
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readable.destroy();
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await assert.isRejected(reader.read(), 'Premature close');
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});
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it('handles error close', async () => {
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const readable = new Readable({
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read() {
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// no-op
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},
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});
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const reader = toWebStream(readable).getReader();
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readable.destroy(new Error('error msg'));
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await assert.isRejected(reader.read(), 'error msg');
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});
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it('can be wrapped and destroyed during data read', async () => {
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const readable = new Readable({
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read() {
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this.push(Buffer.from('hello'));
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},
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});
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const web = toWebStream(readable);
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// Some sort of mismatch between Node's expectation for ReadStream and
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// what TS says ReadStream is in WebAPIs.
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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const node = Readable.fromWeb(web as any);
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node.on('data', () => {
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node.destroy();
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});
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await once(node, 'close');
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});
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});
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