[Sass] [Less] Support selector sequences.

lib/sass/less.rb

@@ -50,13 +50,18 @@ WARNING
           return root
         end
 
-        sel =
-          case @selector
-          when /[+>~]/; "#{@selector} "
-          else @selector
+        sel = []
+        el = self
+        loop do
+          case el.selector
+          when ":", "::"; sel << "#{el.selector}#{el.name}"
+          else sel << el.selector << el.name
           end
-        rule = Sass::Tree::RuleNode.new([sel, @name])
-        rules.each {|r| rule << r.to_sass_tree}
+          break unless el.rules.size == 1 && el.rules.first.is_a?(Element)
+          el = el.rules.first
+        end
+        rule = Sass::Tree::RuleNode.new(sel.reject {|s| s.empty?}.join(" "))
+        el.rules.each {|r| rule << r.to_sass_tree}
         return rule
       end
 

test/sass/less_conversion_test.rb

@@ -89,6 +89,33 @@ a.foo#bar[attr=val] {a: b}
 LESS
   end
 
+  def test_descendant_selector
+    assert_renders <<SCSS, <<LESS
+.foo .bar {
+  a: b; }
+SCSS
+.foo .bar {a: b}
+LESS
+  end
+
+  def test_child_selector
+    assert_renders <<SCSS, <<LESS
+.foo > .bar {
+  a: b; }
+SCSS
+.foo > .bar {a: b}
+LESS
+  end
+
+  def test_adjacent_selector
+    assert_renders <<SCSS, <<LESS
+.foo + .bar {
+  a: b; }
+SCSS
+.foo + .bar {a: b}
+LESS
+  end
+
   # Properties
 
   def test_space_separated_props