removing useless Generic T on selective, adding tests

crates/teloxide-core/src/types/reply_keyboard_markup.rs

@@ -125,7 +125,7 @@ impl KeyboardMarkup {
     /// Sets [`selective`] to `true`.
     ///
     /// [`selective`]: KeyboardMarkup::selective
-    pub fn selective<T>(self) -> Self {
+    pub fn selective(self) -> Self {
         Self { selective: true, ..self }
     }
 }
@@ -146,6 +146,26 @@ mod tests {
             "selective": false
         }
         "#;
-        serde_json::from_str::<KeyboardMarkup>(data).unwrap();
+        assert!(serde_json::from_str::<KeyboardMarkup>(data).is_ok())
+    }
+    #[test]
+    fn serialize() {
+        let keyboard = vec![
+            vec![
+                KeyboardButton::new("a"),
+                KeyboardButton::new("b"),
+                KeyboardButton::new("c"),
+                KeyboardButton::new("d"),
+            ]
+        ];
+        let keyboard_markup = KeyboardMarkup::new(keyboard)
+            .persistent()
+            .resize_keyboard()
+            .selective()
+            .one_time_keyboard();
+        let expected = r#"{"keyboard":[[{"text":"a"},{"text":"b"},{"text":"c"},{"text":"d"}]],"is_persistent":true,"resize_keyboard":true,"one_time_keyboard":true,"selective":true}"#;
+
+        assert!(serde_json::ser::to_string(&keyboard_markup).is_ok_and(|s|s.eq(expected)));
+
     }
 }