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4 changes: 3 additions & 1 deletion chatkit/server.py
Original file line number Diff line number Diff line change
Expand Up @@ -143,7 +143,9 @@ def full_replace_value(before_value: Any, after_value: Any) -> bool:
):
# Appends to the value prop of Markdown or Text do not trigger a full replace
continue
if full_replace_value(getattr(before, field), getattr(after, field)):
if full_replace_value(
getattr(before, field, None), getattr(after, field, None)
):
return True

return False
Expand Down
32 changes: 31 additions & 1 deletion tests/test_widgets.py
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
import pytest

from chatkit.server import diff_widget
from chatkit.types import WidgetItem
from chatkit.types import WidgetItem, WidgetRootUpdated
from chatkit.widgets import (
BasicRoot,
Card,
Expand Down Expand Up @@ -131,6 +131,36 @@ def test_diff(
assert diff[i].type == expected[i]


@pytest.mark.parametrize("reverse", [False, True])
@pytest.mark.parametrize(
"before, after",
[
(
{"type": "Card", "children": []},
{"type": "Card", "children": [], "size": "sm"},
),
(
{"type": "Card", "children": [{"type": "Text", "value": "Hello"}]},
{
"type": "Card",
"children": [{"type": "Text", "value": "Hello", "color": "secondary"}],
},
),
],
)
def test_diff_replaces_dynamic_widgets_when_properties_are_added_or_removed(
before: dict[str, Any], after: dict[str, Any], reverse: bool
):
before_widget = DynamicWidgetRoot.model_validate(before)
after_widget = DynamicWidgetRoot.model_validate(after)
if reverse:
before_widget, after_widget = after_widget, before_widget

assert diff_widget(before_widget, after_widget) == [
WidgetRootUpdated(widget=after_widget)
]


def test_json_dump_excludes_none_fields():
widget = Card(children=[Text(value="Hello")])

Expand Down