using other than TERM/KILL signal to see if --preserve-status works

tests/by-util/test_timeout.rs

@@ -93,6 +93,18 @@ fn test_preserve_status() {
         .no_stdout();
 }
 
+#[test]
+fn test_preserve_status_even_when_send_signal() {
+    // When sending CONT signal, process doesn't get killed or stopped.
+    // So, expected result is success and code 0.
+    new_ucmd!()
+        .args(&["-s", "CONT", "--preserve-status", ".1", "sleep", "5"])
+        .succeeds()
+        .code_is(0)
+        .no_stderr()
+        .no_stdout();
+}
+
 #[test]
 fn test_dont_overflow() {
     new_ucmd!()