1 files changed, 70 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-stream-inheritance.js b/tests/node_compat/test/parallel/test-stream-inheritance.js
new file mode 100644
index 000000000..296e12996
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-stream-inheritance.js
@@ -0,0 +1,70 @@
+// 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';
+require('../common');
+const assert = require('assert');
+const { Readable, Writable, Duplex, Transform } = require('stream');
+
+const readable = new Readable({ read() {} });
+const writable = new Writable({ write() {} });
+const duplex = new Duplex({ read() {}, write() {} });
+const transform = new Transform({ transform() {} });
+
+assert.ok(readable instanceof Readable);
+assert.ok(!(writable instanceof Readable));
+assert.ok(duplex instanceof Readable);
+assert.ok(transform instanceof Readable);
+
+assert.ok(!(readable instanceof Writable));
+assert.ok(writable instanceof Writable);
+assert.ok(duplex instanceof Writable);
+assert.ok(transform instanceof Writable);
+
+assert.ok(!(readable instanceof Duplex));
+assert.ok(!(writable instanceof Duplex));
+assert.ok(duplex instanceof Duplex);
+assert.ok(transform instanceof Duplex);
+
+assert.ok(!(readable instanceof Transform));
+assert.ok(!(writable instanceof Transform));
+assert.ok(!(duplex instanceof Transform));
+assert.ok(transform instanceof Transform);
+
+assert.ok(!(null instanceof Writable));
+assert.ok(!(undefined instanceof Writable));
+
+// Simple inheritance check for `Writable` works fine in a subclass constructor.
+function CustomWritable() {
+  assert.ok(
+    this instanceof CustomWritable,
+    `${this} does not inherit from CustomWritable`
+  );
+  assert.ok(
+    this instanceof Writable,
+    `${this} does not inherit from Writable`
+  );
+}
+
+Object.setPrototypeOf(CustomWritable, Writable);
+Object.setPrototypeOf(CustomWritable.prototype, Writable.prototype);
+
+new CustomWritable();
+
+assert.throws(
+  CustomWritable,
+  {
+    code: 'ERR_ASSERTION',
+    constructor: assert.AssertionError,
+    message: 'undefined does not inherit from CustomWritable'
+  }
+);
+
+class OtherCustomWritable extends Writable {}
+
+assert(!(new OtherCustomWritable() instanceof CustomWritable));
+assert(!(new CustomWritable() instanceof OtherCustomWritable));