1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/io-checks/stdout-stderr-separation.rs b/tests/ui/io-checks/stdout-stderr-separation.rs
new file mode 100644
index 00000000000..4b356e2fe61
--- /dev/null
+++ b/tests/ui/io-checks/stdout-stderr-separation.rs
@@ -0,0 +1,31 @@
+//@ run-pass
+//@ needs-subprocess
+
+use std::{env, process};
+
+fn child() {
+    print!("[stdout 0]");
+    print!("[stdout {}]", 1);
+    println!("[stdout {}]", 2);
+    println!();
+    eprint!("[stderr 0]");
+    eprint!("[stderr {}]", 1);
+    eprintln!("[stderr {}]", 2);
+    eprintln!();
+}
+
+fn parent() {
+    let this = env::args().next().unwrap();
+    let output = process::Command::new(this).arg("-").output().unwrap();
+    assert!(output.status.success());
+
+    let stdout = String::from_utf8(output.stdout).unwrap();
+    let stderr = String::from_utf8(output.stderr).unwrap();
+
+    assert_eq!(stdout, "[stdout 0][stdout 1][stdout 2]\n\n");
+    assert_eq!(stderr, "[stderr 0][stderr 1][stderr 2]\n\n");
+}
+
+fn main() {
+    if env::args().count() == 2 { child() } else { parent() }
+}