Add spec for not overwriting the image_url on profile update

spec/controllers/users_controller_spec.rb

+#   Copyright (c) 2010, Diaspora Inc.  This file is
+#   licensed under the Affero General Public License version 3.  See
+#   the COPYRIGHT file.
+
+require 'spec_helper'
+
+describe UsersController do
+  before do
+    @user = Factory.create(:user)
+    sign_in :user, @user
+    @user.aspect(:name => "lame-os")
+  end
+
+  describe '#update' do
+    context 'with a profile photo set' do
+      before do
+        @user.person.profile.image_url = "http://tom.joindiaspora.com/images/user/tom.jpg"
+        @user.person.profile.save
+      end
+
+      it "doesn't overwrite the profile photo when an empty string is passed in" do
+        image_url = @user.person.profile.image_url
+        put("update", :id => @user.id, "user"=> {"profile"=> 
+          {"image_url"   => "",
+            "last_name"  => @user.person.profile.last_name,
+            "first_name" => @user.person.profile.first_name}})
+        
+        @user.person.profile.image_url.should == image_url
+      end
+
+    end
+  end
+end