如何在Rspec中指定validates_uniqueness_of？

Question

怎么做到这一点？无法在线找到任何示例...(使用rspec 2.5.0&rails 3.0.5)

Answer 1

发现于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