From 8f9d8d201ed81de53eb54f8457e58254784664a3 Mon Sep 17 00:00:00 2001
From: 魏曹先生 <1992414357@qq.com>
Date: Wed, 17 Jun 2026 13:53:37 +0800
Subject: Add Display and From impls for Languages enum

---
 shakehand-test/src/lib.rs | 68 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

(limited to 'shakehand-test/src')

diff --git a/shakehand-test/src/lib.rs b/shakehand-test/src/lib.rs
index 8c60441..a59d993 100644
--- a/shakehand-test/src/lib.rs
+++ b/shakehand-test/src/lib.rs
@@ -176,6 +176,74 @@ mod test {
         let greeting = Global::greeting(Global::world());
         assert_eq!(greeting, "Hello, world!");
     }
+
+    #[test]
+    fn test_set_lang_from_str() {
+        let _lock = lock_lang();
+        set_lang("en");
+        assert_eq!(Global::world(), "world");
+
+        set_lang("zh_CN");
+        assert_eq!(Global::world(), "世界");
+
+        set_lang("zh-CN");
+        assert_eq!(Global::world(), "世界");
+
+        set_lang("  en  ");
+        assert_eq!(Global::world(), "world");
+    }
+
+    #[test]
+    fn test_set_lang_from_string() {
+        let _lock = lock_lang();
+        set_lang(String::from("fr"));
+        assert_eq!(Global::world(), "monde");
+
+        set_lang(String::from("zh_TW"));
+        assert_eq!(Global::world(), "世界");
+    }
+
+    #[test]
+    fn test_languages_display() {
+        let _lock = lock_lang();
+
+        assert_eq!(Languages::en.to_string(), "en");
+        assert_eq!(Languages::zh_CN.to_string(), "zh_CN");
+        assert_eq!(Languages::fr.to_string(), "fr");
+        assert_eq!(format!("{}", Languages::ja), "ja");
+    }
+
+    #[test]
+    fn test_from_str_cases() {
+        use std::convert::From;
+
+        assert_eq!(
+            <Languages as From<&str>>::from("en") as u8,
+            Languages::en as u8
+        );
+        assert_eq!(
+            <Languages as From<&str>>::from("zh_CN") as u8,
+            Languages::zh_CN as u8
+        );
+        assert_eq!(
+            <Languages as From<&str>>::from("zh-CN") as u8,
+            Languages::zh_CN as u8
+        );
+        assert_eq!(
+            <Languages as From<&str>>::from("ZH_CN") as u8,
+            Languages::zh_CN as u8
+        );
+        assert_eq!(
+            <Languages as From<&str>>::from("zh-cn") as u8,
+            Languages::zh_CN as u8
+        );
+    }
+
+    #[test]
+    #[should_panic(expected = "unknown language")]
+    fn test_from_str_unknown() {
+        let _ = Languages::from("klingon");
+    }
 }
 
 mod locale {
-- 
cgit