Added XML::Node#html? and XML::Node#xml?

The former has been moved over from XML::Text, the latter just inverts
html?.

lib/oga/xml/node.rb

@@ -163,6 +163,22 @@ module Oga
 
         node_set.insert(index, other)
       end
+
+      ##
+      # @return [TrueClass|FalseClass]
+      #
+      def html?
+        root = root_node
+
+        return root.is_a?(Document) && root.html?
+      end
+
+      ##
+      # @return [TrueClass|FalseClass]
+      #
+      def xml?
+        return !html?
+      end
     end # Element
   end # XML
 end # Oga

lib/oga/xml/text.rb

@@ -48,17 +48,6 @@ module Oga
 
         return Entities.encode(super)
       end
-
-      private
-
-      ##
-      # @return [TrueClass|FalseClass]
-      #
-      def html?
-        root = root_node
-
-        return root.is_a?(Document) && root.html?
-      end
     end # Text
   end # XML
 end # Oga

spec/oga/xml/node_spec.rb

@@ -204,4 +204,36 @@ describe Oga::XML::Node do
       @container.children[1].should == other
     end
   end
+
+  describe '#html?' do
+    it 'returns true if the node resides within an HTML document' do
+      node     = described_class.new
+      document = Oga::XML::Document.new(:children => [node], :type => :html)
+
+      node.html?.should == true
+    end
+
+    it 'returns false if the node resides within an XML document' do
+      node     = described_class.new
+      document = Oga::XML::Document.new(:children => [node], :type => :xml)
+
+      node.html?.should == false
+    end
+  end
+
+  describe '#xml?' do
+    it 'returns true if the node resides within an XML document' do
+      node     = described_class.new
+      document = Oga::XML::Document.new(:children => [node], :type => :xml)
+
+      node.xml?.should == true
+    end
+
+    it 'returns false if the node resides within an HTML document' do
+      node     = described_class.new
+      document = Oga::XML::Document.new(:children => [node], :type => :html)
+
+      node.xml?.should == false
+    end
+  end
 end