1 files changed, 25 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-next-tick-fixed-queue-regression.js b/tests/node_compat/test/parallel/test-next-tick-fixed-queue-regression.js
new file mode 100644
index 000000000..fff40f754
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-next-tick-fixed-queue-regression.js
@@ -0,0 +1,25 @@
+// 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');
+
+// This tests a highly specific regression tied to the FixedQueue size, which
+// was introduced in Node.js 9.7.0: https://github.com/nodejs/node/pull/18617
+// More specifically, a nextTick list could potentially end up not fully
+// clearing in one run through if exactly 2048 ticks were added after
+// microtasks were executed within the nextTick loop.
+
+process.nextTick(() => {
+  Promise.resolve(1).then(() => {
+    for (let i = 0; i < 2047; i++)
+      process.nextTick(common.mustCall());
+    const immediate = setImmediate(common.mustNotCall());
+    process.nextTick(common.mustCall(() => clearImmediate(immediate)));
+  });
+});