Mock_model not working in rspec2?

undefined method `model_name’ for Message:Class

spec/views/messages/new.html.erb_spec.rb

class Message; end

describe “messages/new.html.erb” do
it “renders a form to create a message” do
assign(:message, mock_model(Message).as_new_record)
render

app/views/messages/new.html.erb

<%= form_for @message do |f| %>
<%= f.submit “Save” %>
<% end %>

  1. messages/new.html.erb renders a form to create a message
    Failure/Error: Unable to find matching line from backtrace
    undefined method `model_name’ for Message:Class

    On line #1 of /users/kristianconsult/development/languages/ruby/

apps/web-apps/rails/rails-3/experimental/views_example/app/views/
messages/new.html.erb

1: <%= form_for @message do |f| %>
2:   <%= f.submit "Save" %>
3: <% end %>

Please report this to http://github.com/rspec/rspec-rails/issues