integration test api call with xml body

I have implemented an API to be used like

curl -X POST -H 'Content-type: application/xml' -d '<user><login>john</

<password>123456</password></user>' http://0.0.0.0:3000/users/register

and the above call works like charm. However, I can't figure out how
to test this. The best I could come up with is using an integration
test like:

def test_user_registration

  assert_difference('User.count') do
    xml = '<user>
              <login>phibo</login>
              <email>phibo@wonderland.org</email>
              <password>somesecret</password>
            </user>'

    post_via_redirect 'users/register', :user => xml, :content_type =>
'application/xml'
  end
end

This test actually calls the correct method on the users_controller,
however, the params[:user] yields unparsed XML instead of the usual
hash. Any idea how to do this?

(Yes, I do plan to use cucumber, rspec and webrat in the future, but
for now I have to do it the hard way..)

ok, solved it myself using an integration test like this:

    assert_difference('User.count') do
      xml = "<user>
              <login>phibo</login>
              <email>ph...@wonderland.org</email>
              <password>somesecret</password>
             </user>"

      post 'api/users/register', xml, :content_type => 'application/
xml'
    end

    assert_response :created