adding wrapper for twitter's profile image api method

lib/twitter.rb

@@ -10,7 +10,7 @@ module Twitter
 
   def self.client; Twitter::Unauthenticated.new end
 
-  def_delegators :client, :firehose, :user, :suggestions, :retweeted_to_user, :retweeted_by_user, :status, :friend_ids, :follower_ids, :timeline, :lists_subscribed, :list_timeline
+  def_delegators :client, :firehose, :user, :suggestions, :retweeted_to_user, :retweeted_by_user, :status, :friend_ids, :follower_ids, :timeline, :lists_subscribed, :list_timeline, :profile_image
 
   def self.adapter
     @adapter ||= Faraday.default_adapter

lib/twitter/unauthenticated.rb

@@ -92,16 +92,18 @@ def list_timeline(list_owner_screen_name, slug, options = {})
       end.body
     end
 
+    def profile_image(screen_name)
+      connection_with_unparsed_response.get do |request|
+        request.url "users/profile_image/#{screen_name}.json"
+      end.headers["location"]
+    end
+
     def connection
-      headers = {
-        :user_agent => Twitter.user_agent
-      }
-      @connection ||= Faraday::Connection.new(:url => @api_endpoint, :headers => headers) do |builder|
-        builder.adapter(@adapter || Faraday.default_adapter)
-        builder.use Faraday::Response::RaiseErrors
-        builder.use Faraday::Response::ParseJson
-        builder.use Faraday::Response::Mashify
-      end
+      connection_with_builders(Faraday::Response::RaiseErrors, Faraday::Response::ParseJson, Faraday::Response::Mashify)
+    end
+
+    def connection_with_unparsed_response
+      connection_with_builders(Faraday::Response::RaiseErrors, Faraday::Response::Mashify)
     end
 
     private
@@ -115,6 +117,16 @@ def merge_user_into_options!(user_id_or_screen_name, options={})
       end
       options
     end
+
+    def connection_with_builders(*builders)
+      headers = {
+        :user_agent => Twitter.user_agent
+      }
+      Faraday::Connection.new(:url => @api_endpoint, :headers => headers) do |builder|
+        builder.adapter(@adapter || Faraday.default_adapter)
+        builders.each do |b| builder.use b end
+      end
+    end
 
   end
 end

test/test_helper.rb

@@ -26,9 +26,10 @@ def twitter_url(url)
   url =~ /^http/ ? url : "http://api.twitter.com#{url}"
 end
 
-def stub_get(url, filename, status=nil)
+def stub_get(url, filename, status=nil, location=nil)
   options = {:body => fixture_file(filename)}
   options.merge!({:status => status}) unless status.nil?
+  options.merge!({:location => location}) unless location.nil?
   FakeWeb.register_uri(:get, twitter_url(url), options)
 end
 

test/twitter/unauthenticated_test.rb

@@ -134,5 +134,10 @@ class UnauthenticatedTest < Test::Unit::TestCase
       assert Twitter.list_timeline('pengwynn', 'rubyists', {:page => 2, :per_page => 1})
     end
   end
+
+  should "get a user's profile image" do
+    stub_get('/1/users/profile_image/ratherchad.json', 'array.json', nil, 'http://a3.twimg.com/profile_images/1107413683/n605431196_2079896_558_normal.jpg')
+    assert_equal 'http://a3.twimg.com/profile_images/1107413683/n605431196_2079896_558_normal.jpg',  Twitter.profile_image( 'ratherchad' )
+  end
 
 end