From 9b0a9e95d52c580c1a2c2259f8651b476d79bc83 Mon Sep 17 00:00:00 2001
From: Satyam Shukla <61821492+satyamnoob@users.noreply.github.com>
Date: Fri, 7 Oct 2022 18:42:49 +0530
Subject: [PATCH 1/2] Create palindrome.dart

---
 strings/palindrome.dart | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 strings/palindrome.dart

diff --git a/strings/palindrome.dart b/strings/palindrome.dart
new file mode 100644
index 00000000..837046f5
--- /dev/null
+++ b/strings/palindrome.dart
@@ -0,0 +1,16 @@
+void main(){
+print('Enter Words or number');
+    // User enter a string or a number
+    String? original =  'hannah';
+  
+   // then we will reverse the input
+   String? reverse = original.split('').reversed.join('');
+  // then we will compare
+  if(original == reverse)
+  {
+    print('Its A Palindrome');
+  }else{
+    print('Its A Not Palindrome');
+  }
+ 
+}

From 22ae678f8a1319ab51d065473be3c65070d99734 Mon Sep 17 00:00:00 2001
From: Satyam Shukla <61821492+satyamnoob@users.noreply.github.com>
Date: Sat, 8 Oct 2022 11:08:41 +0530
Subject: [PATCH 2/2] Added tests

---
 strings/palindrome.dart | 97 +++++++++++++++++++++++++++++++++++------
 1 file changed, 83 insertions(+), 14 deletions(-)

diff --git a/strings/palindrome.dart b/strings/palindrome.dart
index 837046f5..642ed81b 100644
--- a/strings/palindrome.dart
+++ b/strings/palindrome.dart
@@ -1,16 +1,85 @@
-void main(){
-print('Enter Words or number');
-    // User enter a string or a number
-    String? original =  'hannah';
-  
-   // then we will reverse the input
-   String? reverse = original.split('').reversed.join('');
-  // then we will compare
-  if(original == reverse)
-  {
-    print('Its A Palindrome');
-  }else{
-    print('Its A Not Palindrome');
+import 'package:test/test.dart';
+
+void main() {
+  palindrome();
+}
+
+void palindrome() {
+  print('Enter Words or number');
+  // User enter a string or a number
+  String original = 'hannah';
+
+  // then we will reverse the input
+  String reverseUsingLoop = reverseStringUsingLoop(original);
+  String reverseUsingSplit = reverseStringUsingSplit(original);
+  String reverseUsingRunes = reverseStringUsingRunes(original);
+  String reverseUsingCodeUnits = reverseStringUsingCodeUnits(original);
+
+  // then we will compare (Use any one of the four)
+  if (original == reverseUsingLoop) {
+    // print('Its A Palindrome');
+  } else {
+    // print('Its A Not Palindrome');
+  }
+
+  if (original == reverseUsingSplit) {
+    // print('Its A Palindrome');
+  } else {
+    // print('Its A Not Palindrome');
+  }
+
+  if (original == reverseUsingRunes) {
+    // print('Its A Palindrome');
+  } else {
+    // print('Its A Not Palindrome');
   }
- 
+
+  if (original == reverseUsingCodeUnits) {
+    // print('Its A Palindrome');
+  } else {
+    // print('Its A Not Palindrome');
+  }
+
+  // test
+  group('Palindrome Check', () {
+    test('Using loop to reverse a string.', () {
+      var string = 'hannah';
+      expect(string, equals(reverseStringUsingLoop(string)));
+    });
+    test('Using split to reverse a string.', () {
+      var string = 'hannah';
+      expect(string, equals(reverseStringUsingSplit(string)));
+    });
+    test('Using runes to reverse a string.', () {
+      var string = 'hannah';
+      expect(string, equals(reverseStringUsingRunes(string)));
+    });
+    test('Using code units to reverse a string.', () {
+      var string = 'hannah';
+      expect(string, equals(reverseStringUsingCodeUnits(string)));
+    });
+  });
+}
+
+String reverseStringUsingLoop(String input) {
+  String reversed = "";
+  for (int index = input.length - 1; index >= 0; index--) {
+    reversed += input[index];
+  }
+  return reversed;
+}
+
+String reverseStringUsingSplit(String input) {
+  var chars = input.split('');
+  return chars.reversed.join();
+}
+
+String reverseStringUsingRunes(String input) {
+  var chars = input.runes.toList();
+
+  return String.fromCharCodes(chars.reversed);
+}
+
+String reverseStringUsingCodeUnits(String input) {
+  return String.fromCharCodes(input.codeUnits.reversed);
 }