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, 7 insertions, 5 deletions

diff --git a/tests/integration/serve_tests.rs b/tests/integration/serve_tests.rs
index c34b0e286..a1df7825d 100644
--- a/tests/integration/serve_tests.rs
+++ b/tests/integration/serve_tests.rs
@@ -61,11 +61,13 @@ impl ServeClientBuilder {
   fn new() -> Self {
     Self(
       util::deno_cmd()
+        .env("NO_COLOR", "1")
         .current_dir(util::testdata_path())
         .arg("serve")
         .arg("--port")
         .arg("0")
-        .stdout_piped(),
+        .stdout_piped()
+        .stderr_piped(),
       None,
     )
   }
@@ -106,12 +108,12 @@ impl ServeClient {
   fn output(self) -> String {
     let mut child = self.child.borrow_mut();
     child.kill().unwrap();
-    let mut stdout = child.stdout.take().unwrap();
+    let mut stderr = child.stderr.take().unwrap();
     child.wait().unwrap();
 
     let mut output_buf = self.output_buf.borrow_mut();
 
-    stdout.read_to_end(&mut output_buf).unwrap();
+    stderr.read_to_end(&mut output_buf).unwrap();
 
     String::from_utf8(std::mem::take(&mut *output_buf)).unwrap()
   }
@@ -128,7 +130,7 @@ impl ServeClient {
     let mut buffer = self.output_buf.borrow_mut();
     let mut temp_buf = [0u8; 64];
     let mut child = self.child.borrow_mut();
-    let stdout = child.stdout.as_mut().unwrap();
+    let stderr = child.stderr.as_mut().unwrap();
     let port_regex = regex::bytes::Regex::new(r":(\d+)").unwrap();
 
     let start = std::time::Instant::now();
@@ -141,7 +143,7 @@ impl ServeClient {
           String::from_utf8_lossy(&buffer)
         );
       }
-      let read = stdout.read(&mut temp_buf).unwrap();
+      let read = stderr.read(&mut temp_buf).unwrap();
       buffer.extend_from_slice(&temp_buf[..read]);
       if let Some(p) = port_regex
         .captures(&buffer)