Rails 3.1, RSpec: testing model validations

Question

I have started my journey with TDD in Rails and have run into a small issue regarding tests for model validations that I can\'t seem to find a solution to. Let\'s say I have a U

Answer 1

Try this:

it "should require a username" do
  user = User.create(:username => "")
  user.valid?
  user.errors.should have_key(:username)
end