added hex methods

tests/test_bytes.py

@@ -91,6 +91,18 @@ class TestBytes(TestCase):
         with self.assertRaises(TypeError, msg="Bytes(\"1234\")"):
             Bytes("1234")
 
+    def test_hex(self):
+        """
+        Test conversion to hex string
+        """
+        with self.subTest("Test hex() function"):
+            self.assertEqual(Bytes(1234).hex(), "04d2",
+                             f"Bytes(1234).hex() == '04d2'")
+            self.assertEqual(Bytes(1234).hex(":"), "04:d2",
+                             f"Bytes(1234).hex(':') == '04:d2'")
+            self.assertEqual(Bytes(1234).hex(":", 1), "04:d2",
+                             f"Bytes(1234).hex(':', 1) == '04:d2'")
+
     def test_comparison_operators(self):
         """
         Test the comparison operators with Bytes objects