Update tests per maintaing "key" in vdom attrs

Author: shawncrawley

src/reactpy/_html.py

@@ -104,7 +104,7 @@ def _fragment(
     event_handlers: EventHandlerDict,
 ) -> VdomDict:
     """An HTML fragment - this element will not appear in the DOM"""
-    if attributes or event_handlers:
+    if (attributes and any(a != "key" for a in attributes)) or event_handlers:
         msg = "Fragments cannot have attributes besides 'key'"
         raise TypeError(msg)
     model = VdomDict(tagName="")

src/reactpy/transforms.py

@@ -103,7 +103,7 @@ def infer_key_from_attributes(vdom: VdomDict) -> None:
             return
 
         # Infer 'key' from 'attributes.key'
-        key = attributes.pop("key", None)
+        key = attributes.get("key", None)
 
         # Infer 'key' from 'attributes.id'
         if key is None:

tests/test_utils.py

@@ -188,7 +188,7 @@ def test_string_to_reactpy(case):
         # 8: Infer ReactJS `key` from the `key` attribute
         {
             "source": '<div key="my-key"></div>',
-            "model": {"tagName": "div", "key": "my-key"},
+            "model": {"tagName": "div", "attributes": {"key": "my-key"}, "key": "my-key"},
         },
     ],
 )
@@ -253,7 +253,7 @@ def test_non_html_tag_behavior():
         "tagName": "my-tag",
         "attributes": {"data-x": "something"},
         "children": [
-            {"tagName": "my-other-tag", "key": "a-key"},
+            {"tagName": "my-other-tag", "attributes": {"key": "a-key"}, "key": "a-key"},
         ],
     }