Update reverse.rs

1. macro_rules! test_cases:
This macro is designed to reduce repetition by defining multiple test cases at once.
It takes a list of test names and test case tuples ((input, expected)).
2. $name:ident:
The test function name. For example, test_simple_palindrome is generated as the test function name.
3. $test_case:expr:
This represents a tuple of (input, expected) for each test.
4. Generated Test Functions:
Each entry inside test_cases! expands into a separate test function.
For example, the test_simple_palindrome macro expands into a function that tests if reversing "racecar" returns "racecar"

Author: dev-priyanshu15

src/string/reverse.rs

@@ -6,18 +6,28 @@ pub fn reverse(text: &str) -> String {
 mod tests {
     use super::*;
 
-    #[test]
-    fn test_simple() {
-        assert_eq!(reverse("racecar"), "racecar");
+    // Macro for generating test cases
+    macro_rules! test_cases {
+        ($($name:ident: $test_case:expr,)*) => {
+            $(
+                #[test]
+                fn $name() {
+                    let (input, expected) = $test_case;
+                    assert_eq!(reverse(input), expected);
+                }
+            )*
+        };
     }
 
-    #[test]
-    fn test_assymetric() {
-        assert_eq!(reverse("abcdef"), "fedcba")
-    }
-
-    #[test]
-    fn test_sentence() {
-        assert_eq!(reverse("step on no pets"), "step on no pets");
+    // Using the macro to define various test cases
+    test_cases! {
+        test_simple_palindrome: ("racecar", "racecar"),
+        test_non_palindrome: ("abcdef", "fedcba"),
+        test_sentence_with_spaces: ("step on no pets", "step on no pets"),
+        test_empty_string: ("", ""),
+        test_single_character: ("a", "a"),
+        test_leading_trailing_spaces: ("  hello  ", "  olleh  "),
+        test_unicode_characters: ("你好", "好你"),
+        test_mixed_content: ("a1b2c3!", "!3c2b1a"),
     }
 }