added :default_colorizer documentation and test case

Author: denisdefreyne

lib/nanoc3/filters/colorize_syntax.rb

@@ -58,10 +58,13 @@ class ColorizeSyntax < Nanoc3::Filter
     #
     # @param [String] content The content to filter
     #
-    # @option params [symbol] :default_colorizer (DEFAULT_COLORIZER) The
+    # @option params [Symbol] :default_colorizer (DEFAULT_COLORIZER) The
     #   default colorizer, i.e. the colorizer that will be used when the
     #   colorizer is not overriden for a specific language.
     #
+    # @option params [Symbol] :syntax (:html) The syntax to use, which can be
+    #   `:html`, `:xml` or `:xhtml`, the latter two being the same.
+    #
     # @option params [Hash] :colorizers ({}) A hash containing
     #   a mapping of programming languages (symbols, not strings) onto
     #   colorizers (symbols).

test/filters/test_colorize_syntax.rb

@@ -144,4 +144,24 @@ def test_colorize_syntax_with_xhtml
     end
   end
 
+  def test_colorize_syntax_with_default_colorizer
+    if `which pygmentize`.strip.empty?
+      skip 'no pygmentize found, which is required for this test'
+      return
+    end
+
+    if_have 'nokogiri' do
+      # Create filter
+      filter = ::Nanoc3::Filters::ColorizeSyntax.new
+
+      # Get input and expected output
+      input = '<pre><code class="language-ruby">puts "foo"</code></pre>'
+      expected_output = '<pre><code class="language-ruby"><span class="nb">puts</span> <span class="s2">"foo"</span></code></pre>'
+
+      # Run filter
+      actual_output = filter.run(input, :default_colorizer => :pygmentize)
+      assert_equal(expected_output, actual_output)
+    end
+  end
+
 end