Support for evaluating XPath floats.

lib/oga/xpath/evaluator.rb

@@ -768,6 +768,17 @@ module Oga
         return ast_node.children[0].to_f
       end
 
+      ##
+      # Processes an `(float)` node.
+      #
+      # @param [Oga::XPath::Node] ast_node
+      # @param [Oga::XML::NodeSet] context
+      # @return [Float]
+      #
+      def on_float(ast_node, context)
+        return ast_node.children[0]
+      end
+
       ##
       # Processes a `(string)` node.
       #

spec/oga/xpath/evaluator/types/float_spec.rb

@@ -0,0 +1,19 @@
+require 'spec_helper'
+
+describe Oga::XPath::Evaluator do
+  context 'float types' do
+    before do
+      document  = parse('<a></a>')
+      evaluator = described_class.new(document)
+      @number   = evaluator.evaluate('1.2')
+    end
+
+    example 'return literal integers' do
+      @number.should == 1.2
+    end
+
+    example 'return integers as floats' do
+      @number.is_a?(Float).should == true
+    end
+  end
+end