diff options
Diffstat (limited to 'tests/node_compat/test/parallel/test-stream-pipe-same-destination-twice.js')
-rw-r--r-- | tests/node_compat/test/parallel/test-stream-pipe-same-destination-twice.js | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-stream-pipe-same-destination-twice.js b/tests/node_compat/test/parallel/test-stream-pipe-same-destination-twice.js new file mode 100644 index 000000000..7e1215733 --- /dev/null +++ b/tests/node_compat/test/parallel/test-stream-pipe-same-destination-twice.js @@ -0,0 +1,85 @@ +// deno-fmt-ignore-file +// deno-lint-ignore-file + +// Copyright Joyent and Node contributors. All rights reserved. MIT license. +// Taken from Node 18.12.1 +// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually. + +'use strict'; +const common = require('../common'); + +// Regression test for https://github.com/nodejs/node/issues/12718. +// Tests that piping a source stream twice to the same destination stream +// works, and that a subsequent unpipe() call only removes the pipe *once*. +const assert = require('assert'); +const { PassThrough, Writable } = require('stream'); + +{ + const passThrough = new PassThrough(); + const dest = new Writable({ + write: common.mustCall((chunk, encoding, cb) => { + assert.strictEqual(`${chunk}`, 'foobar'); + cb(); + }) + }); + + passThrough.pipe(dest); + passThrough.pipe(dest); + + assert.strictEqual(passThrough._events.data.length, 2); + assert.strictEqual(passThrough._readableState.pipes.length, 2); + assert.strictEqual(passThrough._readableState.pipes[0], dest); + assert.strictEqual(passThrough._readableState.pipes[1], dest); + + passThrough.unpipe(dest); + + assert.strictEqual(passThrough._events.data.length, 1); + assert.strictEqual(passThrough._readableState.pipes.length, 1); + assert.deepStrictEqual(passThrough._readableState.pipes, [dest]); + + passThrough.write('foobar'); + passThrough.pipe(dest); +} + +{ + const passThrough = new PassThrough(); + const dest = new Writable({ + write: common.mustCall((chunk, encoding, cb) => { + assert.strictEqual(`${chunk}`, 'foobar'); + cb(); + }, 2) + }); + + passThrough.pipe(dest); + passThrough.pipe(dest); + + assert.strictEqual(passThrough._events.data.length, 2); + assert.strictEqual(passThrough._readableState.pipes.length, 2); + assert.strictEqual(passThrough._readableState.pipes[0], dest); + assert.strictEqual(passThrough._readableState.pipes[1], dest); + + passThrough.write('foobar'); +} + +{ + const passThrough = new PassThrough(); + const dest = new Writable({ + write: common.mustNotCall() + }); + + passThrough.pipe(dest); + passThrough.pipe(dest); + + assert.strictEqual(passThrough._events.data.length, 2); + assert.strictEqual(passThrough._readableState.pipes.length, 2); + assert.strictEqual(passThrough._readableState.pipes[0], dest); + assert.strictEqual(passThrough._readableState.pipes[1], dest); + + passThrough.unpipe(dest); + passThrough.unpipe(dest); + + assert.strictEqual(passThrough._events.data, undefined); + assert.strictEqual(passThrough._readableState.pipes.length, 0); + + passThrough.write('foobar'); +} |