fix(ext/node): support process.stdin.unref() (#22865)

This PR adds private `[REF]()` and `[UNREF]()` methods to Stdin class,
and call them from Node.js polyfill layer (`TTY` class). This enables
`process.stdin.unref()` and `process.stdin.ref()` for the case when
stdin is terminal.

closes #21796

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/integration/run_tests.rs b/tests/integration/run_tests.rs
index 6419f6ff0..eec10f64f 100644
--- a/tests/integration/run_tests.rs
+++ b/tests/integration/run_tests.rs
@@ -5359,3 +5359,32 @@ fn code_cache_npm_with_require_test() {
     assert!(!output.stderr().contains("Updating V8 code cache"));
   }
 }
+
+#[test]
+fn node_process_stdin_unref_with_pty() {
+  TestContext::default()
+    .new_command()
+    .args_vec(["run", "--quiet", "run/node_process_stdin_unref_with_pty.js"])
+    .with_pty(|mut console| {
+      console.expect("START\r\n");
+      console.write_line("foo");
+      console.expect("foo\r\n");
+      console.write_line("bar");
+      console.expect("bar\r\n");
+      console.write_line("baz");
+      console.expect("baz\r\n");
+    });
+
+  TestContext::default()
+    .new_command()
+    .args_vec([
+      "run",
+      "--quiet",
+      "run/node_process_stdin_unref_with_pty.js",
+      "--unref",
+    ])
+    .with_pty(|mut console| {
+      // if process.stdin.unref is called, the program immediately ends by skipping reading from stdin.
+      console.expect("START\r\nEND\r\n");
+    });
+}