Implement css filter

lib/hamlit/filter_compiler.rb

@@ -1,5 +1,6 @@
 require 'temple/html/filter'
 require 'hamlit/concerns/registerable'
+require 'hamlit/filters/css'
 require 'hamlit/filters/javascript'
 
 module Hamlit
@@ -7,6 +8,7 @@ module Hamlit
     extend Concerns::Registerable
 
     register :javascript, Filters::Javascript
+    register :css,        Filters::Css
 
     def on_haml_filter(name, exp)
       compiler = FilterCompiler.find(name)

lib/hamlit/filters/css.rb

@@ -0,0 +1,9 @@
+module Hamlit
+  module Filters
+    class Css
+      def compile(exp)
+        [:html, :tag, 'style', [:html, :attrs], exp]
+      end
+    end
+  end
+end

spec/hamlit/filters/css_spec.rb

@@ -0,0 +1,18 @@
+describe Hamlit::Filters::Css do
+  describe '#compile' do
+    it 'renders css' do
+      assert_render(<<-HAML, <<-HTML)
+        :css
+          .foo {
+            width: 100px;
+          }
+      HAML
+        <style>
+          .foo {
+            width: 100px;
+          }
+        </style>
+      HTML
+    end
+  end
+end