feat(layout): ensure first window can be opened even if a split is re…

…quested

src/qtile_bonsai/layout.py

@@ -451,11 +451,11 @@ def spawn_split(
             - `layout.spawn_split(my_terminal, "y", ratio=0.2, normalize=False)`
             - `layout.spawn_split(my_terminal, "x", position="previous")`
         """
-        if self._tree.is_empty:
-            logger.warn("There are no windows yet to split")
-            return
 
         def _handle_next_window():
+            if self._tree.is_empty:
+                return self._tree.tab()
+
             target = self.focused_pane or self._tree.find_mru_pane()
             return self._tree.split(
                 target, axis, ratio=ratio, normalize=normalize, position=position
@@ -1144,9 +1144,6 @@ def _handle_add_client__restoration_in_progress(self, window: Window) -> BonsaiP
         return pane
 
     def _handle_add_client__normal(self, window: Window) -> BonsaiPane:
-        if self._tree.is_empty:
-            self._next_window_handler = self._handle_default_next_window
-
         pane = self._next_window_handler()
 
         if self._tree.get_config("window.default_add_mode") == "tab":

tests/integration/test_layout.py

@@ -68,6 +68,42 @@ def test_when_floating_window_is_unfloated_then_it_is_added_back_to_layout(
     )
 
 
+class TestSpawnSplit:
+    def test_when_tree_is_empty_then_split_still_adds_first_window_as_tab(
+        self, manager, spawn_test_window_cmd
+    ):
+        assert manager.layout.info()["tree"] == "<empty>"
+
+        manager.layout.spawn_split(spawn_test_window_cmd, "x")
+        time.sleep(0.5)
+
+        assert tree_repr_matches_repr(
+            manager.layout.info()["tree"],
+            """
+            - tc:1
+                - t:2
+                    - sc.x:3
+                        - p:4 | {x: 0, y: 0, w: 800, h: 600}
+            """,
+        )
+
+
+class TestConfigOptions:
+    class TestWindowDefaultAddMode:
+        @pytest.mark.skip(
+            reason="""
+            Need to figure out some things around parametrizing config to pass to chain
+            of fixtures so it reaches the qtile_x11 and qtile_wayland fixtures.
+            """
+        )
+        def test_when_tree_is_empty_and_first_window_was_added_as_a_tab_but_from_a_split_request_then_match_previous_still_respects_that_previous_request_was_for_a_split(
+            self,
+            manager,
+            spawn_test_window_cmd,
+        ):
+            raise
+
+
 class TestStateRestoration:
     def test_when_qtile_config_is_reloaded_then_state_is_restored(
         self, manager, spawn_test_window_cmd