feat: print `Listening on` messages on stderr instead of stdout (#25491)

Fixes https://github.com/denoland/deno/issues/25114

---------

Signed-off-by: Leo Kettmeir <crowlkats@toaxl.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Nathan Whitaker <17734409+nathanwhit@users.noreply.github.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/integration/watcher_tests.rs b/tests/integration/watcher_tests.rs
index 2590e79d6..27c59a27d 100644
--- a/tests/integration/watcher_tests.rs
+++ b/tests/integration/watcher_tests.rs
@@ -1359,16 +1359,16 @@ async fn test_watch_serve() {
     .piped_output()
     .spawn()
     .unwrap();
-  let (mut stdout_lines, mut stderr_lines) = child_lines(&mut child);
+  let (mut _stdout_lines, mut stderr_lines) = child_lines(&mut child);
 
-  wait_contains("Listening on", &mut stdout_lines).await;
+  wait_contains("Listening on", &mut stderr_lines).await;
   // Note that we start serving very quickly, so we specifically want to wait for this message
   wait_contains(r#"Watching paths: [""#, &mut stderr_lines).await;
 
   file_to_watch.write(file_content);
 
   wait_contains("serving", &mut stderr_lines).await;
-  wait_contains("Listening on", &mut stdout_lines).await;
+  wait_contains("Listening on", &mut stderr_lines).await;
 
   check_alive_then_kill(child);
 }