Fix fatal error handling in V3 API (#126)

Author: simolus3

.github/workflows/dart.yml

@@ -14,6 +14,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    timeout-minutes: 10
 
     steps:
       - uses: actions/checkout@v3

lib/src/message_window.dart

@@ -29,6 +29,7 @@ Map<int, _ServerMessageFn> _messageTypeMap = {
   110: (d) => NoDataMessage(),
   116: ParameterDescriptionMessage.new,
   $3: (d) => CloseCompleteMessage(),
+  $N: NoticeMessage.new,
 };
 
 class MessageFramer {

lib/src/server_messages.dart

@@ -11,10 +11,10 @@ import 'types.dart';
 
 abstract class ServerMessage extends BaseMessage {}
 
-class ErrorResponseMessage implements ServerMessage {
+sealed class ErrorOrNoticeMessage implements ServerMessage {
   final fields = <ErrorField>[];
 
-  ErrorResponseMessage(Uint8List bytes) {
+  ErrorOrNoticeMessage(Uint8List bytes) {
     final reader = ByteDataReader()..add(bytes);
 
     int? identificationToken;
@@ -39,6 +39,10 @@ class ErrorResponseMessage implements ServerMessage {
   }
 }
 
+class ErrorResponseMessage extends ErrorOrNoticeMessage {
+  ErrorResponseMessage(super.bytes);
+}
+
 class AuthenticationMessage implements ServerMessage {
   static const int KindOK = 0;
   static const int KindKerberosV5 = 2;
@@ -244,6 +248,10 @@ class NoDataMessage extends ServerMessage {
   String toString() => 'No Data Message';
 }
 
+class NoticeMessage extends ErrorOrNoticeMessage {
+  NoticeMessage(super.bytes);
+}
+
 /// Identifies the message as a Start Copy Both response.
 /// This message is used only for Streaming Replication.
 class CopyBothResponseMessage implements ServerMessage {