fix: Correct error check for expected errors

This commit addresses an issue with the error checking
mechanism. Currently, the `ExpectError` function only verifies
the occurrence of an error during the connection, without considering
the specific error message expected.

The upcoming changes in [1] will simplify lnprototest, but until then,
this fix provides a straightforward and effective solution for
checking error messages.

[1] #95

Signed-off-by: Vincenzo Palazzo <[email protected]>

lnprototest/event.py

@@ -542,6 +542,16 @@ def action(self, runner: "Runner") -> bool:
         error = runner.check_error(self, self.find_conn(runner))
         if error is None:
             raise EventError(self, "No error found")
+        if runner._is_dummy():
+            return True
+        error = bytes.fromhex(error)
+        msg = Message.read(namespace(), io.BytesIO(error))
+        logging.info(f"message received {msg.messagetype.name}, hex {error.hex()}")
+        if msg.messagetype.name not in "error":
+            raise EventError(
+                self,
+                f"not error found but received `{msg.messagetype.name}` with hex: `{error.hex()}`",
+            )
         return True