Fixed nested hashtag, cashtag and email entnties parsing (#1263)

* Fixed nested hashtag, cashtag and email message entities not being parsed correctly when these entities are inside another entity.

* Tests coverage

CHANGES/1259.bugfix.rst

@@ -0,0 +1 @@
+Fixed nested hashtag, cashtag and email message entities not being parsed correctly when these entities are inside another entity.

aiogram/utils/text_decorations.py

@@ -43,8 +43,11 @@ class TextDecoration(ABC):
             MessageEntityType.URL,
             MessageEntityType.MENTION,
             MessageEntityType.PHONE_NUMBER,
+            MessageEntityType.HASHTAG,
+            MessageEntityType.CASHTAG,
+            MessageEntityType.EMAIL,
         }:
-            # This entities should not be changed
+            # These entities should not be changed
             return text
         if entity.type in {
             MessageEntityType.BOLD,
@@ -71,6 +74,8 @@ class TextDecoration(ABC):
         if entity.type == MessageEntityType.CUSTOM_EMOJI:
             return self.custom_emoji(value=text, custom_emoji_id=cast(str, entity.custom_emoji_id))
 
+        # This case is not possible because of `if` above, but if any new entity is added to
+        # API it will be here too
         return self.quote(text)
 
     def unparse(self, text: str, entities: Optional[List[MessageEntity]] = None) -> str:

tests/test_utils/test_text_decorations.py

@@ -113,6 +113,14 @@ class TestTextDecoration:
     ):
         assert decorator.apply_entity(entity, "test") == result
 
+    def test_unknown_apply_entity(self):
+        assert (
+            html_decoration.apply_entity(
+                MessageEntity(type="unknown", offset=0, length=5), "<test>"
+            )
+            == "&lt;test&gt;"
+        )
+
     @pytest.mark.parametrize(
         "decorator,before,after",
         [
@@ -243,6 +251,33 @@ class TestTextDecoration:
                 [MessageEntity(type="bold", offset=0, length=8, url=None, user=None)],
                 "<b>👋🏾 Hi!</b>",
             ],
+            [
+                html_decoration,
+                "#test",
+                [
+                    MessageEntity(type="hashtag", offset=0, length=5),
+                    MessageEntity(type="bold", offset=0, length=5),
+                ],
+                "<b>#test</b>",
+            ],
+            [
+                html_decoration,
+                "$TEST",
+                [
+                    MessageEntity(type="cashtag", offset=0, length=5),
+                    MessageEntity(type="bold", offset=0, length=5),
+                ],
+                "<b>$TEST</b>",
+            ],
+            [
+                html_decoration,
+                "test@example.com",
+                [
+                    MessageEntity(type="email", offset=0, length=16),
+                    MessageEntity(type="bold", offset=0, length=16),
+                ],
+                "<b>test@example.com</b>",
+            ],
         ],
     )
     def test_unparse(