Merge branch 'main' of https://github.com/Textualize/Textual into placeholder

tests/snapshot_tests/test_snapshots.py

@@ -13,6 +13,7 @@ SNAPSHOT_APPS_DIR = Path("./snapshot_apps")
 
 # --- Layout related stuff ---
 
+
 def test_grid_layout_basic(snap_compare):
     assert snap_compare(LAYOUT_EXAMPLES_DIR / "grid_layout1.py")
 
@@ -50,6 +51,7 @@ def test_dock_layout_sidebar(snap_compare):
 # When adding a new widget, ideally we should also create a snapshot test
 # from these examples which test rendering and simple interactions with it.
 
+
 def test_checkboxes(snap_compare):
     """Tests checkboxes but also acts a regression test for using
     width: auto in a Horizontal layout context."""
@@ -106,6 +108,10 @@ def test_fr_units(snap_compare):
     assert snap_compare("snapshot_apps/fr_units.py")
 
 
+def test_tree_example(snap_compare):
+    assert snap_compare(WIDGET_EXAMPLES_DIR / "tree.py")
+
+
 # --- CSS properties ---
 # We have a canonical example for each CSS property that is shown in their docs.
 # If any of these change, something has likely broken, so snapshot each of them.
@@ -128,7 +134,18 @@ def test_multiple_css(snap_compare):
     assert snap_compare("snapshot_apps/multiple_css/multiple_css.py")
 
 
+def test_order_independence(snap_compare):
+    # Interaction between multiple CSS files and app-level/classvar CSS
+    assert snap_compare("snapshot_apps/order_independence.py")
+
+
+def test_order_independence_toggle(snap_compare):
+    # Interaction between multiple CSS files and app-level/classvar CSS
+    assert snap_compare("snapshot_apps/order_independence.py", press="t,_")
+
+
 # --- Other ---
 
+
 def test_key_display(snap_compare):
     assert snap_compare(SNAPSHOT_APPS_DIR / "key_display.py")