Initial Const Implementation

tests/parser/test_const_type_parser.py

@@ -0,0 +1,23 @@
+from typing_extensions import Annotated, get_args, get_origin
+from webbrowser import get
+from jambo.parser import ConstTypeParser
+
+from unittest import TestCase
+
+
+class TestConstTypeParser(TestCase):
+    def test_parse_const_type(self):
+        parser = ConstTypeParser()
+
+        expected_const_value = "United States of America"
+        properties = {
+            "const": expected_const_value
+        }
+
+        parsed_type, parsed_properties = parser.from_properties(
+            "country", properties
+        )
+
+        self.assertEqual(get_origin(parsed_type), Annotated)
+
+        self.assertIn(str, get_args(parsed_type))