convert events.InformationalResponseReceived into a dataclass

Author: mhils

src/h2/events.py

@@ -235,7 +235,7 @@ class _PushedRequestSent(_HeadersSent):
     """
 
 
-
+@dataclass(**kw_only)
 class InformationalResponseReceived(Event):
     """
     The InformationalResponseReceived event is fired when an informational
@@ -259,20 +259,20 @@ class InformationalResponseReceived(Event):
        Added ``priority_updated`` property.
     """
 
-    def __init__(self) -> None:
-        #: The Stream ID for the stream this informational response was made
-        #: on.
-        self.stream_id: int | None = None
+    stream_id: int
+    """The Stream ID for the stream this informational response was made on."""
 
-        #: The headers for this informational response.
-        self.headers: list[Header] | None = None
+    headers: list[Header] = _LAZY_INIT
+    """The headers for this informational response."""
 
-        #: If this response also had associated priority information, the
-        #: associated :class:`PriorityUpdated <h2.events.PriorityUpdated>`
-        #: event will be available here.
-        #:
-        #: .. versionadded:: 2.4.0
-        self.priority_updated: PriorityUpdated | None = None
+    priority_updated: PriorityUpdated | None = None
+    """
+    If this response also had associated priority information, the
+    associated :class:`PriorityUpdated <h2.events.PriorityUpdated>`
+    event will be available here.
+
+    .. versionadded:: 2.4.0
+    """
 
     def __repr__(self) -> str:
         return f"<InformationalResponseReceived stream_id:{self.stream_id}, headers:{self.headers}>"

src/h2/stream.py

@@ -424,9 +424,7 @@ def recv_informational_response(self, previous_state: StreamState) -> list[Event
             msg = "Informational response after final response"
             raise ProtocolError(msg)
 
-        event = InformationalResponseReceived()
-        event.stream_id = self.stream_id
-        return [event]
+        return [InformationalResponseReceived(stream_id=self.stream_id)]
 
     def recv_alt_svc(self, previous_state: StreamState) -> list[Event]:
         """

tests/test_events.py

@@ -159,9 +159,10 @@ def test_informationalresponsereceived_repr(self) -> None:
         """
         InformationalResponseReceived has a useful debug representation.
         """
-        e = h2.events.InformationalResponseReceived()
-        e.stream_id = 62
-        e.headers = self.example_informational_headers
+        e = h2.events.InformationalResponseReceived(
+            stream_id=62,
+            headers=self.example_informational_headers,
+        )
 
         assert repr(e) == (
             "<InformationalResponseReceived stream_id:62, headers:["