worker: no throw on property access/postMessage after termination

PR-URL: https://github.com/nodejs/node/pull/25871
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/test/parallel/test-worker-safe-getters.js b/test/parallel/test-worker-safe-getters.js
new file mode 100644
index 0000000000..23c8de7c7b
--- /dev/null
+++ b/test/parallel/test-worker-safe-getters.js
@@ -0,0 +1,38 @@
+'use strict';
+
+const common = require('../common');
+
+const assert = require('assert');
+const { Worker, isMainThread } = require('worker_threads');
+
+if (isMainThread) {
+  const w = new Worker(__filename, {
+    stdin: true,
+    stdout: true,
+    stderr: true
+  });
+
+  w.on('exit', common.mustCall((code) => {
+    assert.strictEqual(code, 0);
+
+    // `postMessage` should not throw after termination
+    // (this mimics the browser behavior).
+    w.postMessage('foobar');
+    w.ref();
+    w.unref();
+
+    // Although not browser specific, probably wise to
+    // make sure the stream getters don't throw either.
+    w.stdin;
+    w.stdout;
+    w.stderr;
+
+    // Sanity check.
+    assert.strictEqual(w.threadId, -1);
+    assert.strictEqual(w.stdin, null);
+    assert.strictEqual(w.stdout, null);
+    assert.strictEqual(w.stderr, null);
+  }));
+} else {
+  process.exit(0);
+}