From 903d4ff7d01362da3afc32475dc3a049d8059e42 Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <etryzelaar@google.com>
Date: Wed, 8 Dec 2021 13:39:17 -0500
Subject: [PATCH] Make sure we don't warn when fields are used

https://github.com/rust-lang/rust/pull/85200 changed rust to emit more
unused warnings if fields in a struct are ultimately never read. This
adds a test to make sure that we don't experience these warnings.
---
 argh/tests/lib.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/argh/tests/lib.rs b/argh/tests/lib.rs
index 5c4ace6..fe8c858 100644
--- a/argh/tests/lib.rs
+++ b/argh/tests/lib.rs
@@ -1288,3 +1288,21 @@ fn redact_arg_values_produces_errors_with_bad_arguments() {
         }),
     );
 }
+
+#[test]
+fn redact_arg_values_does_not_warn_if_used() {
+    #[forbid(unused)]
+    #[derive(FromArgs, Debug)]
+    /// Short description
+    struct Cmd {
+        #[argh(positional)]
+        /// speed of cmd
+        speed: u8,
+    }
+
+    let cmd = Cmd::from_args(&["program-name"], &["5"]).unwrap();
+    assert_eq!(cmd.speed, 5);
+
+    let actual = Cmd::redact_arg_values(&["program-name"], &["5"]).unwrap();
+    assert_eq!(actual, &["program-name", "speed"]);
+}