Add XML support to RESTful binary sensor (#110062)

* Add XML support to RESTful binary sensor

* Add test for binary sensor with XML input data

* Address mypy validation results by handling None returns

* Use proper incorrect XML instead of blank

* Change failure condition to match the behavior of the library method

* Change error handling for bad XML to expect ExpatError

* Parametrize bad XML test to catch both empty and invalid XML

* Move exception handling out of the shared method

---------

Co-authored-by: Erik Montnemery <erik@montnemery.com>

homeassistant/components/rest/data.py

@@ -4,7 +4,6 @@ from __future__ import annotations
 
 import logging
 import ssl
-from xml.parsers.expat import ExpatError
 
 import httpx
 import xmltodict
@@ -79,14 +78,8 @@ class RestData:
             and (content_type := headers.get("content-type"))
             and content_type.startswith(XML_MIME_TYPES)
         ):
-            try:
-                value = json_dumps(xmltodict.parse(value))
-            except ExpatError:
-                _LOGGER.warning(
-                    "REST xml result could not be parsed and converted to JSON"
-                )
-            else:
-                _LOGGER.debug("JSON converted from XML: %s", value)
+            value = json_dumps(xmltodict.parse(value))
+            _LOGGER.debug("JSON converted from XML: %s", value)
         return value
 
     async def async_update(self, log_errors: bool = True) -> None: