import unittest

class TestSolution(unittest.TestCase):
    def test_simple(self):
        test_cases = [
            ("Hello World", "dlroW olleH"),
            ("", ""),
            ("a", "a"),
            ("racecar", "racecar"),
            ("12345", "54321"),
            ("!@# $%", "%$ #@!")
        ]
        
        print("\n=== Function Output Test Results ===")
        for input_val, expected in test_cases:
            try:
                actual = revstring(input_val) # pyright: ignore[reportUndefinedVariable]
                status = "✓ PASS" if actual == expected else "✗ FAIL"
                print(f"{status} | Input: '{input_val}' -> Got: '{actual}' | Expected: '{expected}'")
                self.assertEqual(actual, expected)
            except Exception as e:
                print(f"✗ ERROR | Input: '{input_val}' -> Exception: {e}")
                raise

if __name__ == "__main__":
    unittest.main(verbosity=2)