From 7de6df878238ca8e3d9723bb9650f7fe9470d8bd Mon Sep 17 00:00:00 2001
From: Ed Page <eopage@gmail.com>
Date: Fri, 16 Feb 2024 06:41:45 -0600
Subject: [PATCH] test(error): Show existing last behavior

---
 tests/builder/error.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tests/builder/error.rs b/tests/builder/error.rs
index 833a614d265..e1f7baacbb9 100644
--- a/tests/builder/error.rs
+++ b/tests/builder/error.rs
@@ -150,6 +150,29 @@ For more information, try '--help'.
     assert_error(err, expected_kind, MESSAGE, true);
 }
 
+#[test]
+#[cfg(feature = "error-context")]
+fn suggest_trailing_last() {
+    let cmd = Command::new("cargo")
+        .arg(arg!([TESTNAME]).last(true))
+        .arg(arg!(--"ignore-rust-version"));
+
+    let res = cmd.try_get_matches_from(["cargo", "--ignored"]);
+    assert!(res.is_err());
+    let err = res.unwrap_err();
+    let expected_kind = ErrorKind::UnknownArgument;
+    static MESSAGE: &str = "\
+error: unexpected argument '--ignored' found
+
+  tip: a similar argument exists: '--ignore-rust-version'
+
+Usage: cargo --ignore-rust-version [-- <TESTNAME>]
+
+For more information, try '--help'.
+";
+    assert_error(err, expected_kind, MESSAGE, true);
+}
+
 #[test]
 #[cfg(feature = "error-context")]
 fn trailing_already_in_use() {