AIOG-T-48. User method get_mention() added

* method added
 * unit tests added
 * markdown utils typing fixed
 * ParseMode types class added

fixup! AIOG-T-48. User method get_mention() added

tests/test_api/test_types/test_user.py

@@ -1,5 +1,9 @@
+from unittest import mock
+from unittest.mock import PropertyMock, _patch
+
 import pytest
 
+from aiogram import Bot
 from aiogram.api.types import User
 
 
@@ -36,3 +40,28 @@ class TestUser:
     def test_url(self, user_id: int, expected_url: str):
         user = User(id=user_id, is_bot=False, first_name="User", last_name="Name")
         assert user.url == expected_url
+
+    @pytest.mark.parametrize(
+        "name, as_html, bot_parse_mode, expected_mention",
+        [
+            ["Markdown User", False, None, "[Markdown User](tg://user?id=42)"],
+            ["HTML User", True, None, '<a href="tg://user?id=42">HTML User</a>'],
+            ["HTML Bot", None, "HTML", '<a href="tg://user?id=42">HTML Bot</a>'],
+            ["Lowercase html", None, "html", '<a href="tg://user?id=42">Lowercase html</a>'],
+            ["MarkdownV2 Bot", None, "MarkdownV2", "[MarkdownV2 Bot](tg://user?id=42)"],
+            [None, True, "Markdown", '<a href="tg://user?id=42">User Name</a>'],
+            [None, False, "Markdown", "[User Name](tg://user?id=42)"],
+        ],
+    )
+    @mock.patch("aiogram.api.types.User.bot", new_callable=PropertyMock)
+    def test_get_mention(
+        self,
+        mock_bot_property: _patch,
+        name: str,
+        as_html: bool,
+        bot_parse_mode: str,
+        expected_mention: str,
+    ):
+        user = User(id=42, is_bot=False, first_name="User", last_name="Name")
+        mock_bot_property.return_value = Bot(token="42:TEST", parse_mode=bot_parse_mode)
+        assert user.get_mention(name, as_html) == expected_mention