Fix clear_options() for SelectionList

src/textual/widgets/_selection_list.py

@@ -694,3 +694,12 @@ def add_option(
             SelectionError: If the selection option is of the wrong form.
         """
         return self.add_options([item])
+
+    def clear_options(self) -> Self:
+        """Clear the content of the selection list.
+
+        Returns:
+            The `SelectionList` instance.
+        """
+        self._selected.clear()
+        return super().clear_options()

tests/selection_list/test_selection_list_create.py

@@ -10,7 +10,6 @@
 
 import pytest
 from rich.text import Text
-
 from textual.app import App, ComposeResult
 from textual.widgets import SelectionList
 from textual.widgets.option_list import Option
@@ -98,3 +97,9 @@ async def test_add_non_selections() -> None:
             selections.add_option(("Nope",))
         with pytest.raises(SelectionError):
             selections.add_option(("Nope", 0, False, 23))
+
+async def test_clear_options() -> None:
+    async with SelectionListApp().run_test() as pilot:
+        selections = pilot.app.query_one(SelectionList)
+        selections.clear_options()
+        assert selections.selected == []