new problem and deleted the obsolete problem loader

src/problems/regex-phone/test.py

@@ -0,0 +1,33 @@
+import re
+import unittest
+
+## def is_valid_phone_number(phone_number : str):
+    ## return bool(re.search(r"^(\d{3}-){2}\d{4}$", phone_number))
+
+import unittest
+
+class TestPhoneNumberRegex(unittest.TestCase):
+    def test_if_valid(self):
+        test_cases = [
+            ("123-456-7890", True),   # Valid format
+            ("111-222-3333", True),   # Another valid format
+            ("abc-def-ghij", False),  # Letters instead of digits
+            ("1234567890", False),    # Missing dashes
+            ("123-45-67890", False),  # Wrong grouping
+            ("12-3456-7890", False),  # Wrong grouping again
+            ("", False),              # Empty string
+        ]
+        print("\nPHONE NUMBER VALIDATION TEST RESULTS")
+
+        for phone, expected in test_cases:
+            try:
+                actual = is_valid_phone_number(phone)  # pyright: ignore[reportUndefinedVariable]
+                status = "✓ PASS" if actual == expected else "✗ FAIL"
+                print(f"{status} | Input: '{phone}' -> Got: {actual} | Expected: {expected}")
+                self.assertEqual(actual, expected)
+            except Exception as e:
+                print(f"✗ ERROR | Input: '{phone}' -> Exception: {e}")
+                raise
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)