fix(ext/node): allow automatic worker_thread termination (#22647)

Co-authored-by: Matt Mastracci <matthew@mastracci.com>

3 files changed, 18 insertions, 0 deletions

diff --git a/tests/integration/worker_tests.rs b/tests/integration/worker_tests.rs
index 7b1bddead..492a06e36 100644
--- a/tests/integration/worker_tests.rs
+++ b/tests/integration/worker_tests.rs
@@ -111,3 +111,10 @@ itest!(worker_doest_stall_event_loop {
   output: "workers/worker_doest_stall_event_loop.ts.out",
   exit_code: 0,
 });
+
+// Test for https://github.com/denoland/deno/issues/22629
+itest!(node_worker_auto_exits {
+  args: "run --quiet --allow-read workers/node_worker_auto_exits.mjs",
+  output: "workers/node_worker_auto_exits.mjs.out",
+  exit_code: 0,
+});
diff --git a/tests/testdata/workers/node_worker_auto_exits.mjs b/tests/testdata/workers/node_worker_auto_exits.mjs
new file mode 100644
index 000000000..abfb084c3
--- /dev/null
+++ b/tests/testdata/workers/node_worker_auto_exits.mjs
@@ -0,0 +1,9 @@
+import { isMainThread, Worker } from "node:worker_threads";
+
+if (isMainThread) {
+  // This re-loads the current file inside a Worker instance.
+  const w = new Worker(import.meta.filename);
+} else {
+  console.log("Inside Worker!");
+  console.log(isMainThread); // Prints 'false'.
+}
diff --git a/tests/testdata/workers/node_worker_auto_exits.mjs.out b/tests/testdata/workers/node_worker_auto_exits.mjs.out
new file mode 100644
index 000000000..18934d3ed
--- /dev/null
+++ b/tests/testdata/workers/node_worker_auto_exits.mjs.out
@@ -0,0 +1,2 @@
+Inside Worker!
+false