added test and update the lib doc to show the usecase of need_reshape

src/lib.rs

@@ -35,6 +35,19 @@
 //!     println!("{line}");
 //! }
 //! ```
+//! 
+//! You can also check if a text need reshaping or not, this method can be
+//! useful when you dont want a copy of original string in case of no reshape.
+//! ```rust
+//! use ar_reshaper::ArabicReshaper;
+//! 
+//! let reshaper = ArabicReshaper::default();
+//! 
+//! let text = "من به reshape نیاز دارم";
+//! if reshaper.need_reshape(text) {
+//!     println!("{}", reshaper.reshape(text));
+//! }
+//! ```
 //!
 //! A rusty rewrite of [python-arabic-reshaper](https://github.com/mpcabd/python-arabic-reshaper)
 //! You can check the original repository for more information.

tests/basic_reshaping.rs

@@ -1,5 +1,21 @@
 use ar_reshaper::ArabicReshaper;
 
+#[test]
+fn need_reshape() {
+    let reshaper = ArabicReshaper::default();
+
+    let cases = [
+        ("سلام", true),
+        ("خوبی؟", true),
+        ("Yeah, Im good", false),
+        ("How about you?", false),
+    ];
+
+    for (text, neeed_reshape) in cases {
+        assert_eq!(reshaper.need_reshape(text), neeed_reshape);
+    }
+}
+
 #[test]
 fn default_reshaping() {
     let reshaper = ArabicReshaper::default();