Basic support for evaluating XPath wildcards.

lib/oga/xpath/evaluator.rb

@@ -71,7 +71,19 @@ module Oga
         @context.each do |xml_node|
           next unless xml_node.is_a?(XML::Element)
 
-          if xml_node.name == name and xml_node.namespace == ns
+          name_matches = xml_node.name == name || name == '*'
+          ns_matches   = false
+
+          if ns and (xml_node.namespace == ns or ns == '*')
+            ns_matches = true
+
+          # If there's no namespace given but the name matches we'll also mark
+          # the namespace as matching.
+          elsif name_matches
+            ns_matches = true
+          end
+
+          if name_matches and ns_matches
             @stack << xml_node
           end
         end

spec/oga/xpath/evaluator/paths_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe Oga::XPath::Evaluator do
   before do
-    @document  = parse('<a><b></b><b></b></a>')
+    @document  = parse('<a><b></b><b></b><ns1:c></ns1:c></a>')
     @evaluator = described_class.new(@document)
   end
 
@@ -62,4 +62,24 @@ describe Oga::XPath::Evaluator do
       @set[1].should == a.children[1]
     end
   end
+
+  context 'namespaced paths' do
+    before do
+      @set = @evaluator.evaluate('a/ns1:c')
+    end
+
+    example 'return a NodeSet instance' do
+      @set.is_a?(Oga::XML::NodeSet).should == true
+    end
+
+    example 'return the right amount of rows' do
+      @set.length.should == 1
+    end
+
+    example 'return the correct row' do
+      a = @document.children[0]
+
+      @set[0].should == a.children[-1]
+    end
+  end
 end

spec/oga/xpath/evaluator/wildcard_spec.rb

@@ -0,0 +1,31 @@
+require 'spec_helper'
+
+describe Oga::XPath::Evaluator do
+  before do
+    @document  = parse('<a><b></b><b></b><ns1:c></ns1:c></a>')
+    @evaluator = described_class.new(@document)
+  end
+
+  context 'full wildcards' do
+    before do
+      @set = @evaluator.evaluate('a/*')
+    end
+
+    example 'retunr the right amount of rows' do
+      @set.length.should == 3
+    end
+
+    example 'include the first <b> node' do
+      @set[0].name.should == 'b'
+    end
+
+    example 'include the second <b> node' do
+      @set[1].name.should == 'b'
+    end
+
+    example 'include the <ns1:c> node' do
+      @set[2].name.should      == 'c'
+      @set[2].namespace.should == 'ns1'
+    end
+  end
+end