Spacing tests

sandbox/uber.css

@@ -1,7 +1,7 @@
 #uber1 {
   layout: vertical;
   background: dark_green;
-  overflow: hidden auto;
+  overflow-x: x;
   border: heavy white;
 }
 

src/textual/css/_styles_builder.py

@@ -7,11 +7,11 @@ import rich.repr
 from ._error_tools import friendly_list
 from ._help_renderables import HelpText
 from ._help_text import (
+    spacing_invalid_value,
     spacing_wrong_number_of_values,
     scalar_help_text,
-    spacing_invalid_value,
-    string_enum_help_text,
     color_property_help_text,
+    string_enum_help_text,
     border_property_help_text,
     layout_property_help_text,
     docks_property_help_text,

tests/test_geometry.py

@@ -324,6 +324,12 @@ def test_spacing_sub():
         Spacing(1, 2, 3, 4) - "foo"
 
 
+def test_spacing_convenience_constructors():
+    assert Spacing.vertical(2) == Spacing(2, 0, 2, 0)
+    assert Spacing.horizontal(2) == Spacing(0, 2, 0, 2)
+    assert Spacing.all(2) == Spacing(2, 2, 2, 2)
+
+
 def test_split():
     assert Region(10, 5, 22, 15).split(10, 5) == (
         Region(10, 5, 10, 5),