How to spec validates_uniqueness_of in Rspec?

Question

How does one do this? Couldn't find any examples online... (using rspec 2.5.0 & rails 3.0.5)

Answer 1

Found it in shoulda-matchers: http://rubydoc.info/github/thoughtbot/shoulda-matchers/master/frames

Answer 2

before(:each) do
  @attr = { :bar => "foobar" }
end

it "should reject duplicate bar" do
  Foo.create!(@attr)
  duplicate_bar = Foo.new(@attr)
  duplicate_bar.should_not be_valid
end