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-rw-r--r--tests/node_compat/test/parallel/test-stream-pipe-same-destination-twice.js85
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');
+}