Fetch a node's tag name

lib/capybara/driver/webkit/node.rb

@@ -33,7 +33,7 @@ class Capybara::Driver::Webkit
     end
 
     def tag_name
-      raise NotImplementedError
+      invoke "tagName"
     end
 
     def visible?

spec/driver_spec.rb

@@ -125,5 +125,8 @@ describe Capybara::Driver::Webkit do
     expect { subject.execute_script(%<invalid salad>) }.
       to raise_error(Capybara::Driver::Webkit::WebkitError)
   end
-end
 
+  it "returns a node's tag name" do
+    subject.find("//p").first.tag_name.should == "P"
+  end
+end

src/capybara.js

@@ -24,6 +24,10 @@ Capybara = {
 
   attribute: function (index, name) {
     return this.nodes[index].getAttribute(name);
+  },
+
+  tagName: function(index) {
+    return this.nodes[index].tagName;
   }
 };