1 files changed, 103 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-stream-pipe-unpipe-streams.js b/tests/node_compat/test/parallel/test-stream-pipe-unpipe-streams.js
new file mode 100644
index 000000000..a51dcfbad
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-stream-pipe-unpipe-streams.js
@@ -0,0 +1,103 @@
+// 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');
+const assert = require('assert');
+
+const { Readable, Writable } = require('stream');
+
+const source = Readable({ read: () => {} });
+const dest1 = Writable({ write: () => {} });
+const dest2 = Writable({ write: () => {} });
+
+source.pipe(dest1);
+source.pipe(dest2);
+
+dest1.on('unpipe', common.mustCall());
+dest2.on('unpipe', common.mustCall());
+
+assert.strictEqual(source._readableState.pipes[0], dest1);
+assert.strictEqual(source._readableState.pipes[1], dest2);
+assert.strictEqual(source._readableState.pipes.length, 2);
+
+// Should be able to unpipe them in the reverse order that they were piped.
+
+source.unpipe(dest2);
+
+assert.deepStrictEqual(source._readableState.pipes, [dest1]);
+assert.notStrictEqual(source._readableState.pipes, dest2);
+
+dest2.on('unpipe', common.mustNotCall());
+source.unpipe(dest2);
+
+source.unpipe(dest1);
+
+assert.strictEqual(source._readableState.pipes.length, 0);
+
+{
+  // Test `cleanup()` if we unpipe all streams.
+  const source = Readable({ read: () => {} });
+  const dest1 = Writable({ write: () => {} });
+  const dest2 = Writable({ write: () => {} });
+
+  let destCount = 0;
+  const srcCheckEventNames = ['end', 'data'];
+  const destCheckEventNames = ['close', 'finish', 'drain', 'error', 'unpipe'];
+
+  const checkSrcCleanup = common.mustCall(() => {
+    assert.strictEqual(source._readableState.pipes.length, 0);
+    assert.strictEqual(source._readableState.flowing, false);
+
+    srcCheckEventNames.forEach((eventName) => {
+      assert.strictEqual(
+        source.listenerCount(eventName), 0,
+        `source's '${eventName}' event listeners not removed`
+      );
+    });
+  });
+
+  function checkDestCleanup(dest) {
+    const currentDestId = ++destCount;
+    source.pipe(dest);
+
+    const unpipeChecker = common.mustCall(() => {
+      assert.deepStrictEqual(
+        dest.listeners('unpipe'), [unpipeChecker],
+        `destination{${currentDestId}} should have a 'unpipe' event ` +
+        'listener which is `unpipeChecker`'
+      );
+      dest.removeListener('unpipe', unpipeChecker);
+      destCheckEventNames.forEach((eventName) => {
+        assert.strictEqual(
+          dest.listenerCount(eventName), 0,
+          `destination{${currentDestId}}'s '${eventName}' event ` +
+          'listeners not removed'
+        );
+      });
+
+      if (--destCount === 0)
+        checkSrcCleanup();
+    });
+
+    dest.on('unpipe', unpipeChecker);
+  }
+
+  checkDestCleanup(dest1);
+  checkDestCleanup(dest2);
+  source.unpipe();
+}
+
+{
+  const src = Readable({ read: () => {} });
+  const dst = Writable({ write: () => {} });
+  src.pipe(dst);
+  src.on('resume', common.mustCall(() => {
+    src.on('pause', common.mustCall());
+    src.unpipe(dst);
+  }));
+}